Two Stroke Motocross

Two Stroke Motocross Forum => General Two Stroke Talk => Topic started by: rbigair40 on September 19, 2011, 07:16:36 PM

Title: 2 vs 4 results are in
Post by: rbigair40 on September 19, 2011, 07:16:36 PM
i have a 06 250sxf i have been racing in the woods , i am going to pickup a 08 xc250 thursday for my new woods bike ??  will it be the better bike ? i know it will be better off the start , also any tips on a good set up ?
Title: Re: 2 vs 4
Post by: streaks383 on September 19, 2011, 07:38:18 PM
KTM does a pretty good job with its XC's.  Just ride it and see where you feel it is lacking, go from there.
Title: Re: 2 vs 4
Post by: Mountain Goat on September 19, 2011, 07:40:13 PM
Good choice:

Quote
http://www.dirtrider.com/reviews/motocross/141_1102_2011_ktm_250_xc_first_test/viewall.html

Of course I don't have a problem, I'm merely a professional. And in that capacity I can tell you why the KTM 250 XC is quite possibly the single best dirt bike being produced. This middle-displacement, lightweight, high-performance, multi-tasking ride is simplistic and utopian beyond what I could write here or explain to anyone with a closed mind-for them there must be a test ride. But if you're considering just one motorcycle to accomplish whatever you desire in your riding requirements, this is the best way to get started and the best motorcycle to recommend if you want your advice to be credible. Sure, if you have a more specific purpose for your bike, there may be a better machine to recommend, but as a blanket suggestion, you can't go wrong with the multi-tasking two-stroke KTM XC.
Title: Re: 2 vs 4
Post by: rbigair40 on September 23, 2011, 12:57:28 PM
 :D just picked it up last night i have heard about a sx head and jet specs ? does it work?? havent rode it yet will sunday
Title: Re: 2 vs 4
Post by: eprovenzano on September 23, 2011, 02:54:50 PM
I'd ride it 1st, and see how it suits your style.  KTM's can be tuned to suit your riding style.  The power valve can be adjusted with the different springs supplied in the kit.  I like the red spring which opens the valve sooner, boosting the lower power.  Jetting also makes a big difference in how the bike reacts.  Then there is all the differnt suspension adjustments that can be made
Title: Re: 2 vs 4
Post by: overthebars on September 24, 2011, 11:39:58 AM
2 stoke is easyer and cheaper to adjust to your comfort and wishes. You can switch PV springs, play around with exhausts, adjust the squish, add some flywheel weight, etc.
Allot of options to suit the bike to your needs without spending thousands of dollars.

http://www.ktmtalk.com/ (http://www.ktmtalk.com/) (if you did not already knew the website) Loads of woodriders over there that have experience with finetuning a smoker to their needs.
Title: Re: 2 vs 4
Post by: rbigair40 on September 26, 2011, 07:00:58 PM
I was wondering if anyone had one and had already did the testing to there liking .I have rode it around what I call the bean in my back yard its about 45 foot peanut shaped up hill track I have a rut about 8 inches  around it ,my wife haven't seen it yet she is going to be mad!!! ha ha so far I like it it turns better then my sxf around the trees 
Title: Re: 2 vs 4
Post by: miedosoracing on September 27, 2011, 01:21:19 PM
Bigair, I find this post quite interesting...   Guess we wore you down, or maybe the 250F did? Anyways, my 07 250XCW was pretty grunty.  As far as turning, uh, duh, LOL. I think we've told you the 2 strokes will turn circles around the 4 stroke. Ha ha.  I don't think you need the head done quite yet. Ride it, and see how you like it. You also need to get the handlebar switch for the ignition. It is very feelable. So you will notice a change if you really know bikes, one is great for comparison to a 4 stroke, and the other lets you do more of a 2 stroke style.  All while on the fly.  The guy I sold mine too, just happened to come in my office on Monday and praise how much he loves it. Has sold off his 4 strokes now.  If you are gonna do work on the motor, I'd say wait and just go to the 300 cylinder and MikeS head when you are ready. 
Title: Re: 2 vs 4
Post by: rbigair40 on September 27, 2011, 06:25:19 PM
I will be taking both bikes SxF and xc to my local riding club and will do a comparison ,after I get the xc set  up the way I like ,I have the sxf  set up ,one will be sold .I will not be selling my 505 sxf I know what it does to 2 strokes LoL
Title: Re: 2 vs 4
Post by: maicoman009 on September 28, 2011, 07:26:38 PM
I will be taking both bikes SxF and xc to my local riding club and will do a comparison ,after I get the xc set  up the way I like ,I have the sxf  set up ,one will be sold .I will not be selling my 505 sxf I know what it does to 2 strokes LoL
You know what it does to 2 strokes but I sure would like to know? I know for a fact that my KTM-300xc will smoke the crap out of these modern 450f 4-strokes!....... 8) ;) 8)
Title: Re: 2 vs 4
Post by: rbigair40 on September 29, 2011, 12:15:29 PM
maby it will smoke the 450s but so does my 505  lol
Title: Re: 2 vs 4
Post by: miedosoracing on September 29, 2011, 12:32:53 PM
maby it will smoke the 450s but so does my 505  lol

A little more pounds though. Gotta admit it.  I'd bet you might reconsider if you rode a well built 2012 300 vs that 505. Then you wouldn't need two bikes at all. Just one would be the best of all worlds.
Title: Re: 2 vs 4
Post by: TMKIWI on September 29, 2011, 12:34:57 PM
You know what it does to 2 strokes but I sure would like to know? I know for a fact that my KTM-300xc will smoke the crap out of these modern 450f 4-strokes!....... 8) ;) 8)

You must have the fastest 300 on the planet. :o
My 300 is only AS quick as a 450.
Maybe I need it tuned. :-X
Title: Re: 2 vs 4
Post by: miedosoracing on September 29, 2011, 12:50:38 PM
You know what it does to 2 strokes but I sure would like to know? I know for a fact that my KTM-300xc will smoke the crap out of these modern 450f 4-strokes!....... 8) ;) 8)

You must have the fastest 300 on the planet. :o
My 300 is only AS quick as a 450.
Maybe I need it tuned. :-X
I'd be willing to bet on a plane drag, the 2 stroke woud beat the 450F.  I believe (I could be wrong) the 300 has more hp and less weight. That is all that matters in quarter mile time. 
Title: Re: 2 vs 4
Post by: TMKIWI on September 29, 2011, 01:06:24 PM
I have found in a straight up drag race there is not much between the 2 bikes.
The TM is slightly quicker but I wouldn't say it "smokes" the 450.
Just keeping it real. :)
Title: Re: 2 vs 4
Post by: miedosoracing on September 29, 2011, 01:11:39 PM
I have found in a straight up drag race there is not much between the 2 bikes.
The TM is slightly quicker but I wouldn't say it "smokes" the 450.
Just keeping it real. :)

Vin D in Fast and F...  LOL
"Ask any racer, and real racer.  It doesn't matter if you win by an inch or a mile, winnings, winning."  Cheers/yelling in background
Title: Re: 2 vs 4
Post by: rbigair40 on September 29, 2011, 05:49:10 PM
woods bikes and moto bikes arnt the same beast  >:-D
Title: Re: 2 vs 4
Post by: Bioflex on October 02, 2011, 02:09:52 AM
I'd be willing to bet on a plane drag, the 2 stroke woud beat the 450F.  I believe (I could be wrong) the 300 has more hp and less weight. That is all that matters in quarter mile time. 


If drag racing was that simple it would be, but it isn't.
Ability to get the power down, low end and mid range grunt, gearing optomised for peak power then being above peak torque after gear changes, as well as top speed are all major factors.

While I would like to think a 300 2 stroke would beat a 450cc thumper, its certainly more complicated than a basic power vs weight scenario
Title: Re: 2 vs 4
Post by: citabjockey on October 02, 2011, 07:26:23 AM
If you take the emotion out of the equation, there really is only one number that counts for MX. The Torphies Per Dollar ratio.

Depending on the rules in effect two strokes would win on this stat hands down.  For human beings, however, emotion is a big part of deciding which bike to ride. What is more fun? Which one looks cool? What sound do you like? Which has handling characteristics that match your riding style? All those are real and all are personal, no way to quantify or argue about those. But trophies per dollar? hard to argue with that -- even if the bike that wins this stat loses a few drag races.
Title: Re: 2 vs 4
Post by: Premixed on October 02, 2011, 09:57:22 PM
You know what it does to 2 strokes but I sure would like to know? I know for a fact that my KTM-300xc will smoke the crap out of these modern 450f 4-strokes!....... 8) ;) 8)

You must have the fastest 300 on the planet. :o
My 300 is only AS quick as a 450.
Maybe I need it tuned. :-X

yea, you need to have one of those "ear" tuners in the EFI thread "listen" to it.  That should be worth a couple HP on the "butt" dyno.
Title: Re: 2 vs 4
Post by: TMKIWI on October 03, 2011, 12:25:14 PM
yea, you need to have one of those "ear" tuners in the EFI thread "listen" to it.  That should be worth a couple HP on the "butt" dyno.

Thanks for the advise. ;)
Title: Re: 2 vs 4
Post by: falston1 on October 03, 2011, 08:32:36 PM
My YZ 250 does do pretty well against 450f's.  ;)
Title: Re: 2 vs 4
Post by: maicoman009 on October 08, 2011, 04:19:48 AM
You know what it does to 2 strokes but I sure would like to know? I know for a fact that my KTM-300xc will smoke the crap out of these modern 450f 4-strokes!....... 8) ;) 8)

You must have the fastest 300 on the planet. :o
My 300 is only AS quick as a 450.
Maybe I need it tuned. :-X
Maybe it's just the guys/kids I've been riding with tmkiwi but I've drag raced a "09" rm-z 450 & a "10" cr-f 450 & beat them both by about 2 bike lengths! When I first got my 300xc the jetting was off pretty bad so I had a friend of mine jet my bike & it's been running great ever since & I will admit when I ride with guys that ride 4-chokes I tend to ride like a maniac & a win @ all cost attitude! I'm a 2t junkie like alot of guys are on TSM & I have to do my best to represent & set an example for the younger riders out there on the pig bikes....lol.... :P
Title: Re: 2 vs 4
Post by: Shawn36 on October 08, 2011, 10:28:23 AM
The problem is pure acceleration in a drag race doesn't mean anything on an MX track.  Fast kids on bikes not even half the size and a 1/4 the horsepower can still pass and run away from most vet riders.  That's what makes moto the greatest racing sport on Earth to me, your chances aren't defined by how much money is put into your bike.  It's almost entirely skill based. 
Title: Re: 2 vs 4
Post by: maicoman009 on October 08, 2011, 11:41:14 PM
The problem is pure acceleration in a drag race doesn't mean anything on an MX track.  Fast kids on bikes not even half the size and a 1/4 the horsepower can still pass and run away from most vet riders.  That's what makes moto the greatest racing sport on Earth to me, your chances aren't defined by how much money is put into your bike.  It's almost entirely skill based. 
You're absolutely right about that Shawn36. MX is entirely skill based. I just wish more of the great young MX'ers out there would embrace the 2 strokes & give them a chance....and then I think we would start to see the smokers up on the podium where I believe they belong.... ;)
Title: Re: 2 vs 4
Post by: Premixed on October 09, 2011, 12:06:50 AM
the problem is you average 15 year old motocrosser is a brainwashed youtube addict with A.D.D. who chews on his leatt brace between motos.  seriously. look around in the pits.  most of us probably werent better but back in teh 80s-90s there was no choice of bikes i guess.
Title: Re: 2 vs 4
Post by: ACMX on October 09, 2011, 12:20:48 AM
Hey man my Leatt is fine.
Title: Re: 2 vs 4 results are in
Post by: rbigair40 on October 09, 2011, 03:23:47 PM
I raced a midsouth harescramble today on my xc250 ,first time ridin it in the wood only rode in the back yard. I loved it way better then my 250f , it didnt want to stall as bad ,tons of roll on power and low end chug! the suspension was bad but i can work that out havent did any thing to it . i have a couple big blisters from the new renthal slims i but on, i will be changing them cutting 1'' off each side of the bars and find tuning the suspension . WHAT A AWESOME BIKE also won class 40a and went 11th overall .But i will still take up for thumpers because i ride both :P
Title: Re: 2 vs 4 results are in
Post by: TMKIWI on October 10, 2011, 08:24:27 PM
Maybe it's just the guys/kids I've been riding with tmkiwi but I've drag raced a "09" rm-z 450 & a "10" cr-f 450 & beat them both by about 2 bike lengths! When I first got my 300xc the jetting was off pretty bad so I had a friend of mine jet my bike & it's been running great ever since & I will admit when I ride with guys that ride 4-chokes I tend to ride like a maniac & a win @ all cost attitude! I'm a 2t junkie like alot of guys are on TSM & I have to do my best to represent & set an example for the younger riders out there on the pig bikes....lol.... :P

I was pulling your chain maicoman. I know how quick 300's are. ;D
I think we just have a different interpretation of the word "smoked".
Gearing makes a big difference as well. I do a few flat track meetings and I have to remember to gear my bike down.( I don't).
On the straights I don't get out of 4th gear so I know the bike will excellerate quicker if I gear it down.
Luckerly the TM has good over rev.
If you can get the power down soon enough out of corners it will pull a 450 ok. ;D
I just wouldn't call it "smoked". Maybe beat or embarrass. ;)
Title: Re: 2 vs 4 results are in
Post by: maicoman009 on October 11, 2011, 03:09:32 PM
Maybe it's just the guys/kids I've been riding with tmkiwi but I've drag raced a "09" rm-z 450 & a "10" cr-f 450 & beat them both by about 2 bike lengths! When I first got my 300xc the jetting was off pretty bad so I had a friend of mine jet my bike & it's been running great ever since & I will admit when I ride with guys that ride 4-chokes I tend to ride like a maniac & a win @ all cost attitude! I'm a 2t junkie like alot of guys are on TSM & I have to do my best to represent & set an example for the younger riders out there on the pig bikes....lol.... :P

I was pulling your chain maicoman. I know how quick 300's are. ;D
I think we just have a different interpretation of the word "smoked".
Gearing makes a big difference as well. I do a few flat track meetings and I have to remember to gear my bike down.( I don't).
On the straights I don't get out of 4th gear so I know the bike will excellerate quicker if I gear it down.
Luckerly the TM has good over rev.
If you can get the power down soon enough out of corners it will pull a 450 ok. ;D
I just wouldn't call it "smoked". Maybe beat or embarrass. ;)
Well ok maybe "smoked" is a bit too strong of a word for only a 2 bike length win but it sure felt like I smoked those 450 chokers!...... ;)
Title: Re: 2 vs 4 results are in
Post by: snook620 on October 11, 2011, 03:47:30 PM
the suspension was bad

Well no crap its a KTM  :P

Hows that new '11 RMZ 450 coming??  :-X





haha...just picking on u
Title: Re: 2 vs 4 results are in
Post by: rbigair40 on October 11, 2011, 04:27:07 PM
its on its way, how bout the yz125 snookie  :-*