Two Stroke Motocross
Two Stroke Motocross Forum => Technical => Topic started by: SachsGS on November 01, 2010, 06:12:34 PM
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Return your carb to stock specs and go from there. Bing carbs are more tolerant of elevation changes then the Japanese carbs and it has been my experience that the jetting specs are very close stock from the factory. I have ridden my 500 from sea level to 8000ft and my 380 to 10,000ft without issue.
It sounds like you purchased the 700 used and it has been my experience that with preowned machines you can't trust anything. For example, if the ignition timing is variable has that been monkeyed with and if the 700 has a powervalve is the unit broken or is the diaghram leaking? Once I found a rag in the exhaust of a machine, perhaps the previous owner should have called it a night sooner. Let us know how you make out and post a picture of the brute. :D
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What Maico 700?
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Return your carb to stock specs and go from there. Bing carbs are more tolerant of elevation changes then the Japanese carbs and it has been my experience that the jetting specs are very close stock from the factory. I have ridden my 500 from sea level to 8000ft and my 380 to 10,000ft without issue.
It sounds like you purchased the 700 used and it has been my experience that with preowned machines you can't trust anything. For example, if the ignition timing is variable has that been monkeyed with and if the 700 has a powervalve is the unit broken or is the diaghram leaking? Once I found a rag in the exhaust of a machine, perhaps the previous owner should have called it a night sooner. Let us know how you make out and post a picture of the brute. :D
Thanks for the help SachsGS, for the word of advice, you spot on, the bike was found on the web for sale and imported into South Africa, the previous owner had said that she had only done 10 hours, to be honest i cannot believe this, I have now pretty much rebuilt the bike from scratch, she looks great now but doesnt run as well as i expected. Any ideas how to set the timing on one of these???
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What Maico 700?
The bike is a 2009 maico 700cc with bing carb #55 on her
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I think I read something from Maico International saying the 700 didn't have a powervalve? But if I remember correctly that was in a description of the special 2011 factory motor, so I don't know of that carries over to the 2009 version of The Monster.
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Was this bought from the guy in UAE (United Arab Emirates)?
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Was this bought from the guy in UAE (United Arab Emirates)?
Yes this is the bike, although when i put the photo's up you would not recognise her... and the previous poster is right i believe no power valve.... any idea on the timing for these?
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You think they changed the timing? Since they used the bike in the desert they may have changed the carb specs. I'd return it to stock as mentioned.
The timing is 2.1mm for the Maico 490 with a motoplat or PVL, but not sure if it would be the same for the 700.
Did you get a manual with the bike? If you did, scan it in :) and send to me for my collection.
http://www.maicowerk.com/Maico/Manuals/ (http://www.maicowerk.com/Maico/Manuals/)
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Main Jet: 210 to 235
Pilot Jet: 85 to 95
Needle Jet: 282 to 286
Air Screw: 1.5
Slide: 170 to 180
Pre-Ignition: 2.4mm and/or 1.8mm
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Hold on just a second. This is the same bike as the UAE one? How is it possible that there is only ONE Maico 700 that anyone has actually ever decide to mention on the internet? I can only conclude that the Maico 700 is either fantastically rare, as in only about ten in existence, or we we have simply stumbled upon a great coincidence!
Okay, there's my second. You may now cease holding on.
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I should also mention that it would be wise to check the compression on that big 700. I'm not sure what the specs are for your machine but you will want to see at least 150psi.Also you might want to pull off the exhaust pipe and look up the exhaust port at the piston rings and piston. I've worked on many a newer machine that has shown evidence of a minor piston seizure.
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Hold on just a second. This is the same bike as the UAE one? How is it possible that there is only ONE Maico 700 that anyone has actually ever decide to mention on the internet? I can only conclude that the Maico 700 is either fantastically rare, as in only about ten in existence, or we we have simply stumbled upon a great coincidence!
Okay, there's my second. You may now cease holding on.
Just like the unicorn... Im on holiday currently, when i get back next week i promise to post pictures. This is the same bike and i have all the customs docs to show, i will post the photos of the wreck i was shipped in the crate but i'll also post the photo's of what the bike looks like now. all i can say is shes a fantastic bike that just needed a little tlc, and thanks to Vincent from Maico UK for all the help, if you ever buy one of these bikes and need help contact the company in the UK, the only problem has as he mentioned to me been, that there hasnt been a jetting chart for a maico with a bing carb for a long while... Now even though she looks good! she runs bad!
So i still need help...
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You think they changed the timing? Since they used the bike in the desert they may have changed the carb specs. I'd return it to stock as mentioned.
The timing is 2.1mm for the Maico 490 with a motoplat or PVL, but not sure if it would be the same for the 700.
Did you get a manual with the bike? If you did, scan it in :) and send to me for my collection.
http://www.maicowerk.com/Maico/Manuals/ (http://www.maicowerk.com/Maico/Manuals/)
Hi i did get a manual for her and i can forward it when im back home, But before i do i must ask for permission from the guys at Maico UK , im sure you understand... ;D
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Ya, no problem, used to getting manuals and putting them up from the older bikes so forgot about that they may not want it listed :)
Why not try the Air Striker carb?
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Ya, no problem, used to getting manuals and putting them up from the older bikes so forgot about that they may not want it listed :)
Why not try the Air Striker carb?
Air striker carb??!!!??? never heard of these, there's a lot of things we dont get here in africa....
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38mm Keihin Air Striker, the new maicos come with them so you might be able to get jetting settings.
(http://www.motocrossactionmag.com/Uploads/Public/Images/AAA/MAKehin.jpg)
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Are there actually Maicos being built?
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Are there actually Maicos being built?
So the rumor goes. :-X
I did see a yeti once.........
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There are actually 3 companies building various categories of Maicos in the U.K., Maico International - modern Maicos, Wulfsport - 1981 Maicos (Evolution class), MaicoOnly - 1983 Maicos converted to twinshock (Evolution class) and Koestler in Germany - modern Maicos.
Your 700 is a Koestler Maico.
There are also Maico badged Chinese pitbikes for entry level riders (TMKIWI take note). ;D
Here in western Canada we have the odd Sasquatch running around. ::)
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There are also Maico badged Chinese pitbikes for entry level riders (TMKIWI take note). ;D
Here in western Canada we have the odd Sasquatch running around. ::)
Just taking the piss SachsGS.
I for one would like to see a video of the new one's going round a track.
Getting a bit tired of all the hype and not getting any info except pictures & press releases.
Surely a euro mag can do a test on an actual bike ?
Like foreplay, a man can only be stand so much before he wants the real thing.
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Hi, looks like bing in Germany may actually send me a jetting chart, we'll wait and see...
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Nice to see all of this Maico knowledge being put to use.
Good job helping a brother out!
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Nice to see all of this Maico knowledge being put to use.
Good job helping a brother out!
And this brother is grateful, all i can say is thanks to SacksGs, managed to find a couple specs from a chap in germany based on his info, this chap had a jetting chart. i put the new jetts in and my g*d this bike is strong, i could not believe the difference. Also thanks to Vincent from Maico intl, even though im new to the brand and just got my first 700cc, again even though i bought it second hand from someone else and not his place. Ive had nothing but help help help, which to me would mean great after sales service if you got a new one from Maico Intl. relax all i dont get paid to say this sh*t... LOL :P :P
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Now, the next step for you is to find some turkey with a CRF450, a friend with a video camera, and then show the world what a roll-on drag-race with The Beast looks like!
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Now, the next step for you is to find some turkey with a CRF450, a friend with a video camera, and then show the world what a roll-on drag-race with The Beast looks like!
you gonna love this!!!
my back up bike is a 2010 crf450x, but no one keen on a race, although i can say, when stuck on a hill the X has the magic button, i wish i didnt always have to really boot the 700cc. >:D
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So you're your own turkey :P
You use the compression release?
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I imagine all the compression release would do is make the bike less like kick-starting a Porsche, and more like kick-starting a Volkswagen. It's still not something you want to do on the side of a cliff. Just the size of the hardware involved demands big power to get things in motion!
Bullshit aside, though, the compression release is a great tool. I was really impressed with how easy it was to kick over a 490 Maico with that little lever pulled in. They say that with the old 760, if you didn't use the compression release, a full-grown man could stand on the starter and it just wouldn't stroke. Go ahead, hop around up there, it's just not going to happen. Now that's balls. :)
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When you're on a hill you just point the front end down hill, pull in the compression release and roll on down the hill.
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Glad you got that 700 running well.
Riffraff is right, the bigbore Maicos bumpstart quite easily when you use the compression release.
Now some video footage of that beast on singletrack (with audio) would be nice. :D
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Singletrack, hell! Then we'll just see a bike cruising through a singletrack trail like every other, except the sound will just the the sound of an idle. No throttle needed. While that would be quite entertaining, I think it'd be best if we got to hear all those horses pushing their muscles to the limit on some open country. Of course, a bit of everything is best. 8)
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I say You wheelie through town, and run from the cops :D
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My dad tried that on a 750 Kawasaki, and it didn't work. But, the Maico has more power, less weight, and should handle a lot better so your chances wouldn't be too bad. Depends on what the pigs use for squad cars in your part of the world. Against a Crown Vic in a tight environment, you might be okay. Against a Hemi Charger on the open freeway, it's probably not in the cards.
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My dad tried that on a 750 Kawasaki, and it didn't work. But, the Maico has more power, less weight, and should handle a lot better so your chances wouldn't be too bad. Depends on what the pigs use for squad cars in your part of the world. Against a Crown Vic in a tight environment, you might be okay. Against a Hemi Charger on the open freeway, it's probably not in the cards.
jeez sorry guys been away i tried running from the cops but they got me so i been in a cell a few days...LOL just shitting you all, i ran from the cops here before on a 450x and they had no chance, you gotta remember that this is africa, we can just climb off the highway and we in the bush, good luck pigs... :P
Again i need help, dont get me wrong she's running very well barring a slight hiccup just off idle, i tried going from the original 85 pilot jet to a 70 but same problem just not as bad, i then tried going to a 60 and all i can say is no stutter but also no real power on the bottom end. Ive been advised to go back to the 70 pilot and try fine tuning the air/fuel screw considering im at about 6500ft. Anybody on here know the correct jet sizes for a bing 55 at this altitude? surely someone has a bing manuel... cheers all
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Here are a few pic's
(http://i1226.photobucket.com/albums/ee408/bigbore1/IMG_1670.jpg)
(http://i1226.photobucket.com/albums/ee408/bigbore1/IMG_1679.jpg)
(http://i1226.photobucket.com/albums/ee408/bigbore1/IMG_1671.jpg)
Sorry about the shitty bike stand...
video soon
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PS if you notice the kick starter missing on the left hand side i broke it, she kicked back and snapped, lucky i had boots on!!!
Im having a decent on machined... We have had to tow start her using a quad...
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Nice bike Big Bore, Good to see someone posting up!
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Looks completely changed from when that guy was posting videos. i.e. it was red with the MAICO logo across the rads to the seat. Now it's all black.
When it kicked back and broke the kicker, were you using the compression release?
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Speaking of broken kickers, I had that happen once.
1984 KTM 495 Rebuild Part 10 (http://www.youtube.com/watch?v=Ivv2eoGUsEg#ws)
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Jetz I was thinking of another kind of single track, hard on the throttle, third gear and put the front wheel down for the corner.Maicos steer so well they are a pleasure to ride single track.
I've never had any of my Maico bigbores kickback hard enough to hurt my foot let alone damage anything. Something "aint" right there.By the way, nice looking motorcycle.
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I've heard tales that the old 501 was the grand master champion of kicking back. They said that on occasion, a rider would bend his knee to kick the bike in this < shape and then the bike would kick back and his knee would be bending in this > direction. Makes my bones ache just thinking about it.
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Looks completely changed from when that guy was posting videos. i.e. it was red with the MAICO logo across the rads to the seat. Now it's all black.
When it kicked back and broke the kicker, were you using the compression release?
This is what came outta the crate, when the bike arrived it looked terrible,
the last owner even tried to convince me it had only done 10 hours which i dont believe for a second.
I was holding the decomp lever in but i think i let go to soon. i also spoke to the guys at maico intl and they said that
this has happened before on these 700's.
IMG]http://i1226.photobucket.com/albums/ee408/bigbore1/MarkMaico01.jpg[/IMG]
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(http://i1226.photobucket.com/albums/ee408/bigbore1/MarkMaico01.jpg)
The photo's aren't going up i hope this one does, I have ordered a set of the original plastics with the original graphics and seat cover.
The ones that came outta the crate were in bad shape. Also the front mudguard was damaged and the only thing we could find to fit the forks was the new KTM
guard and number plate. the rest excluding the shrouds are old YZ plastics, apparently thats what they use on these bikes. She will look the way shes suppose to when everything arrives. But for now i dont mind the black.
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I agree, I have heard TONS of stories of ppl being thrown off on kick back from Maico, but my Maicos never kick back unless the timing is wrong or if you flood them. Otherwise, they never kick back at random.
That guy also rode that bike in the desert, Sand is very hard on bikes.
These are the jetting ranges for the bike:
Main Jet: 210 to 235
Pilot Jet: 85 to 95
Needle Jet: 282 to 286
Air Screw: 1.5
Slide: 170 to 180
And yes I do have a Bing Jetting Manual it's here:
http://www.maicowerk.com/Maico/Manuals/displaymanual.php?id=9 (http://www.maicowerk.com/Maico/Manuals/displaymanual.php?id=9)
Ya, if you got no power then it's too lean.
Try these references:
http://www.all-offroad.com/DirtBikes/Beginners/BGNov98.html (http://www.all-offroad.com/DirtBikes/Beginners/BGNov98.html)
http://articles.superhunky.com/4/55 (http://articles.superhunky.com/4/55)
I had strange problems too when jetting a flat slide on the 82 Maico. One way it was too lean at certain RPM and other ways it was too rich at a certain RPM. And the jets overlap, so is it the needle jet or the jet neeld or the pilot or ht emain. Funny was that top RPM was good, but middle wasn't. usually, that means needle jet or jet needle. However, turned out to be main.
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Bigbore,
The decomp lever doesn't need to be let out until after the bike starts, they'll run with the decomp open.
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I agree, I have heard TONS of stories of ppl being thrown off on kick back from Maico, but my Maicos never kick back unless the timing is wrong or if you flood them. Otherwise, they never kick back at random.
That guy also rode that bike in the desert, Sand is very hard on bikes.
These are the jetting ranges for the bike:
Main Jet: 210 to 235
Pilot Jet: 85 to 95
Needle Jet: 282 to 286
Air Screw: 1.5
Slide: 170 to 180
And yes I do have a Bing Jetting Manual it's here:
http://www.maicowerk.com/Maico/Manuals/displaymanual.php?id=9 (http://www.maicowerk.com/Maico/Manuals/displaymanual.php?id=9)
Ya, if you got no power then it's too lean.
Try these references:
http://www.all-offroad.com/DirtBikes/Beginners/BGNov98.html (http://www.all-offroad.com/DirtBikes/Beginners/BGNov98.html)
http://articles.superhunky.com/4/55 (http://articles.superhunky.com/4/55)
I had strange problems too when jetting a flat slide on the 82 Maico. One way it was too lean at certain RPM and other ways it was too rich at a certain RPM. And the jets overlap, so is it the needle jet or the jet neeld or the pilot or ht emain. Funny was that top RPM was good, but middle wasn't. usually, that means needle jet or jet needle. However, turned out to be main.
hi thanks for that, i sent you a PM i hope you got it, still learning how this site works...
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I had a 74 Honda CR250M, yes the hearalded Honda Elsinore... She had a lot of kick back... Never broke a kick starter, but bruised the bottom of my foot more than once trying to start it without the proper boots.
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Given the low hours on your machine the following bits probably don't apply:
1.Bing carb slides are prone to wear,and when they wear people will compensate by bumping up the pilot jet size - it doesn't work.
2.When the needle and seat assy. start to wear (or your float height is too high) you'll feel it first off the bottom.
3.Over oiled air filter.My 380 tells me it wants the air filter cleaned when it starts to get a little rich off the bottom.
When you initially crack that throttle (when the slide starts to move) you have three circuits at play,you are transitioning from the idle air circuit, you are in the "meat of the pilot circuit and you are transitioning to the slide/needle circuit.
I recently resurrected an old Sachs that had been ported and had an aftermarket pipe.I installed a Mikuni round slide and proceeded to get the jetting sorted out. After numerous pilot/air screw combinations and after going to a more slender needle(more gradual taper) and shimming the needle I still had a "hitch" right off the bottom when I first cracked the throttle.At this point I remembered an old trick taught to me and I "cheated".I took .020" off the intake/bevelled side of the slide.
After that the Sachs ran "electric" most of the time,the hitch only reappearing slightly when the motor got hot.At that point the bike was a first kick starter so I didn't worry about it.
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How much gas does your tank hold and how many MPG do you get?
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How much gas does your tank hold and how many MPG do you get?
Tank holds 9.5litres, and to be honest i have no idea how far that goes. I try keep her juiced up always. I think in your speak the tank holds about 2gal.
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bear in mind im still trying to tame this beast...
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I got a 3.5 gallon tank and an aux 1.08 gallon tank on my Maico 490 :)
This is my kitchen BTW :)
(http://img843.imageshack.us/img843/6017/dsc05839c.jpg)
(http://img715.imageshack.us/img715/9601/dsc05845x.jpg)
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Fantastic kitchen, but i can tell you now that if my wife came home and found half my bike in the kitchen, i would be a dead man. :'(
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Haha
I put together part of the frame for a KTM 495 in my kitchen:
(http://img403.imageshack.us/img403/21/62423852.png)
My daughter likes my 86 Maico 500, says she wants it to ride when she gets big.
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All I can say is, with an ambition like that, tell her to drink lots of milk!
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Years ago I new a guy who raced a TZ250 and his kitchen was his workshop.
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Jeez my boy is only 2 and a half and the wife is worried because his getting a bike for xmas> what do you guys think? PW50 or oset electric trials bike...???
A pity Maico or huskie dont do a kiddies bike. Imagine them hill climbing by age 3. ;D
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Jeez my boy is only 2 and a half and the wife is worried because his getting a bike for xmas> what do you guys think? PW50 or oset electric trials bike...???
A pity Maico or huskie dont do a kiddies bike. Imagine them hill climbing by age 3. ;D
(http://www.maicomfg.com/images/what_kids_kid_best_mini_dirt_bike_bikes_learn_maico_mx_dirt_bike_004_n7u3.jpg)
Two problems with it, it's a 4 stroke and it's orange :P
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And then there's this one, Husqvarna WR 50, but not too sure about it being a beginners bike ::)
(http://www.bikez.com/pictures/husqvarna/2002/19879_0_1_4_wr%2050_Image%20by%20Husqvarna.%20Published%20with%20permission..jpg)
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(http://xa.yimg.com/kq/groups/4919487/sn/1132223671/name/810380387-0.jpg)
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Found the beginner bike, Husqvarna Husky Boy J
(http://www.bikez.com/pictures/husqvarna/2002/19869_0_1_2_husky%20boy%20j_Image%20credits%20-%20cool%20bike.jpg)
Opferman, what year and Model is that Maico?
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Most likely a Maico MD 50 transplated into a 1970s Maico Frame.
(http://www.maicowerk.com/Images/Maico/Brochures/74md50yellow.jpg)
(http://www.maicowerk.com/Images/Maico/Brochures/67-68md50orangefront.jpg)
Maico used to build engines for Go-Karts, like the Spit Fire:
(http://www.maicowerk.com/Images/Maico/Ads/engrayad2.jpg)
(http://www.maicowerk.com/Images/Maico/Ads/spitfiread.jpg)
This one the engine looks like a transplant (i.e., not maico or maybe some older maico Kart motor) made to look like a 70s maico (or transplated into a 70s maico):
(http://www.maicomadness.com/minmai.jpg)
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little transplant or not it still looks like a very nice bike but maybe a little strong for 2.5 years old
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But seriously, oset or PW50 what do you all think???
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PW50 all the way, It wont break, If it does Parts are in stock 8)
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PW50 all the way, It wont break, If it does Parts are in stock 8)
x2
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I had a go cart and my first bike was a Kawasaki KE 100. I had a minibike before the KE 100 but my dad smashed it with a sledge hammer.
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Did he not like Kawasaki???
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He smashed my minibike not the Kawasaki. The mini bike had no power, you basically had to walk the thing to get it going.
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Ya, no problem, used to getting manuals and putting them up from the older bikes so forgot about that they may not want it listed :)
Why not try the Air Striker carb?
Hi chap you got me thinking? Which air striker and what jetting, remember im at 6000ft, i want the best outta the bike...
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You would have to ask Maico International. They put Air Striker carbs on the new Maicos, so they should be able to tell the carb and have the jetting specs they used.