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Messages - Paul P

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General Two Stroke Talk / engine differences between 2001 and 2005 yz250
« on: January 08, 2014, 12:19:51 AM »
The crank wheels were different on the YZ's I worked on. Maybe the owner has 2000 and 2001 models and doesn't know it.
      It could be as easy as getting the correct bushings for the swingarm pivot like on the Honda CR's to swap motors into a later chassis..
That's good to know then, that it is the casting internals of the motor that are slightly different. You could probably find a 99 motor or bike cheap, and have a spare motor ready to go for different types of riding/racing.

General Two Stroke Talk / engine differences between 2001 and 2005 yz250
« on: January 06, 2014, 03:44:27 AM »
I recently rebuilt a crank for a friend with an 01 and 02 YZ 250. I compared the two cranks side by side. The crankshaft wheels are 1mm larger in diameter on the 02, so you won't be able to swap out cranks or cases, unless you machine the cases about 1/2 mm larger to accept the slightly bigger crank. Not much else looked different between the two motors internally. I would not use the 01 crank in the 02 case, as you would loose too much base compression, and turn it into a slug.
   I wasn't able to see if the motors would swap into either frame.

Vintage Two Strokes / 1982 PE175
« on: January 02, 2014, 04:18:19 AM »
I have a cylinder and piston from that exact same year bike I am selling on eBay. It is pretty much a fresh bore, 040 oversize (1mm). Actually, I have the bottom end for sale, as well as some of the chassis parts. I could take it off the auction if you want it.

Vintage Two Strokes / Maico Spider with type 55??
« on: July 18, 2013, 03:38:34 AM »
I have a 93 320 with the Mueller USD air forks, yellow/blue seat, ect. The forks are the plushest USD forks I have ever tried. I can't believe these forks were not copied until recently.

Vintage Two Strokes / Maico Spider with type 55??
« on: July 04, 2013, 03:28:20 PM »
The type 55 Bing has a Magnesium body, and flow even better than the 54. I have seen only 38 40 and 44mm sizes. I used a type 55 44mm Bing on my Honda CR500 ( the Bing was also a hop up for CR's) to many hillclimb wins, including the 87 AMA amatuer top time, and the Muskegon Mi AMA Pro hillclimb in 1988.
  Contrary to all the articles from way back about Bing's, the Bing's are way easier to jet right, easier starting, more consistent running, and more power can be had than the Mikuni replacements. I have a flat slide Mikuni on my 320 Maico, and it is a bear to start, and it runs different (too lean to too rich) from morning to afternnon, so the Bing is going back on.
   The only issue with a Magnesium carb is they wear out faster than an aluminum carb in the slide area, also,  don't try to use ethanol or methanol fuels, it will destroy the magnesium.

General Two Stroke Talk / Honda CR125 2007 tips and mods
« on: August 04, 2012, 10:05:33 PM »
I would not use the longer rod unless you want to tame (slow) the motor down. The longer rod and a spacer will give you less base compression, ( to push the fuel charge up the transfer ports into the combustion area) which makes a big difference coming out of sharp corners, and snap for big bumps or jumps. If the rod kit is 5mm longer, I would pass, if it's only 1 or 2mm longer, you may not notice it as much.
     The last CR 125 I modded was a 2001 model for a local expert. The intake track of the rubber carb intake was a lot smaller than the carb. I shaved it out to get a constant size, matched the boost ports to the cases, and roughened all the intake, transfer area's for better atomizing. Cometic used to make special gasket kits with different thickness base gaskets for more or less compression. The bike was able to run with all the other modded cr's, and walk away from the stock CR's.

General Two Stroke Talk / Breaking Maico News........
« on: July 27, 2012, 04:21:01 PM »
Never heard of him. Since the 4 strokes took over I haven't kept in touch with pro racing.
He's riding an enduro model.
Those are the same comments I made about the 2008 YZF450 I tried back in 08. Seems like you have to rev it to 10 grand for it to go. Heavy feeling, too.
   Ford needs to contact Brad Lackey, Marty Smith Chuck sun and Bob Hannah about their thoughts of the 490 Maico.

General Two Stroke Talk / Breaking Maico News........
« on: July 26, 2012, 03:02:11 PM »
If you,ve never ridden one, and blindly say they were ticking time bombs, then you are writing just to build up your posting count.
   The dilusional are the ones that think the big four had the best bikes back in the 70's and 80's.
   I know of several local 490 Yamaha owners, all are bitching that parts are no longer available, and are ticking time bombs. ( they have far more colourful statements to describe them that cannot be printed on this board) The complete opposite of your comments.
 You really need to try an 81 Maico 250 or 490 before any further statements against them. If you were only 13 in 1981, then you really have no clue what you are even saying, and it shows.

Vintage Two Strokes / 84 Maico 250
« on: May 17, 2012, 03:55:31 AM »
If you have a water cooled 250, it is an 85 or newer. The 84 250's were air-cooled. The 86 250 is the first Maico with a power valve. I had an 86 back in the day.
     I believe Wossner makes pistons for the 83 and up Maico's. Contact my brother Rich at Pinsonnault moto-X at 413 547 6500. He may have clutch plates in stock.
  The 90's models started using sintered friction plates, and steel drive plates, which is the hot set-up to get if you want a good working clutch, but they are expensive. I have a 93 320 and it came with the sintered plates.
  The original friction plates in the 83-90 Maico's are the same as the friction plates in the late 70's early 80's Husqvarna's, 250 390 430, and those are cheap and easy to find on ebay.
   Email me if you are having trouble finding new plates, I have lots of great condition used.

General Two Stroke Talk / Re: I'm looking at a 1995 CR500
« on: July 14, 2011, 06:59:49 AM »
87 to 01 CR500 engines are very close to the same. 89 and up used an extra plate in the clutch stack, and routed the water spigot mount a little different.
    Most of the CR500's in my area were trail ridden or made into hillclimbers. Very few made it to the tracks because the tracks were too tight to get them out of third gear.
    If it has a truely rebuilt motor, you will get quite a few years of riding out of it with little maintainence.

For that money, just get a Maico/Zabel 680 motor and slip it into the CR or CRF frame. The mounts are really close to the CR500. I know of a few CR frames with the Maico/Zabel motors.

General Two Stroke Talk / Adolph Weil R.I.P.
« on: May 19, 2011, 05:39:57 PM »
Got word today that Motocross Legend Adolph Weil died last week. Most people on this site may not know who he is, but he was definitely one of the great Gran Prix racers in the late 60's early 70's. He was German National Champion 14 times, and US Trans Am Champion, along with many GP wins and top three GP year end point finishes.
   He also had MX models of the Maico brand named after him as a replica of the machine he modified for the GP's, the AW Maico's in 1976 77. That is something you may never see again with the current state of motocross.

General Two Stroke Talk / Re: more 2 stroke winners
« on: March 09, 2011, 07:23:00 AM »
Actually, yes, the big four have had more development in off-road than the press will lead you to believe, more than any of the Euro's, all the way back to the 60's.
   The first PE's were out in mid 70's, IT's, MR's and Honda had lots of development in their XL 250's in the early 70's, but they had to compete cc for cc, unlike modern day.
   The European bike's were just more suited for off-road. They handled better, power was correct for dirt riding, and they were dependable. All the riders with KDX, PE's, IT's that were around my neighborhood back then were always coming into my shop for frame repairs, suspension mods, good tires, Euro bend handlebars, and engine mods to be able to chug around in tight trails rather than hauling on smooth fireroads. These riders bought these because they were cheap out the door, but what they spent on tires, bars, suspension, ect. to make the bike right brought the cost well over a Euro bike's out the door cost.

Vintage Two Strokes / Re: Maico gearbox oil
« on: February 24, 2011, 06:35:32 AM »
I have been using Motul two stroke transmission oil, and BelRay EXP 20-50 as per recomendations from Selveraj N. from talking to him in the 70's. He claimed the entire Maico team used BelRay EXP exclusively in the trannys.
   Both oils have been excellent for me in all 30 of the Maico's I own, all models up to 1982, the later models, 83 and newer I would recomend the Motul.

General Two Stroke Talk / Re: Rampant Stupidity!!
« on: February 07, 2011, 05:26:21 PM »
Hey MXLORD327,
    I live a half hour away from Southwick. I raced NESC in the 70's and early 80's. I know what you are talking about first-hand, also. There were a lot of 'Special riders', you know, the ones that if they get a bad start, the black flag goes out so they can have a second chance to get a better one. And I'm talking the Expert classes.
   I rode my butt off in one moto in 81 on my 1978 Maico 440, getting about a 5th place start and was only passed by two heavily sponsered riders after 20 minutes and two laps. When I went to check results, they listed me as the 23rd finisher! I went to the president of NESC at the time, no help there, talked to the scorers, track officials. I got nowhere. I was told that I could protest, so I went to find the people to talk to there, and they were gone.
   Another open Expert race at Pepperell, my favorite track at the time, I am in third place at the start, behind the two point leaders and feeling like they were going slower than I was. But, two of the Hotshoes went down in the first corner. My pit-board guy said they were up and running right away. But their buddy was the finish line flagger with and waved the black flag as soon as he seen they were on the ground. On the restart, I was between the two that went down the first time, and I was slammed by both of them right out of the gate. I went down, but there was no black flag that time and I ended up one position out of the money.
  I also went on to better things, winning 5 consecutive AMA pro hillclimb championships on a 84CR500. A bike that I was told would not even make the hills on the circuit.

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