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Technical / Re: 07 YZ450F Suspension on a YZ250
« on: August 16, 2011, 02:47:31 AM »
They both have the SSS KYB forks. At least 06 and newer, to my knowledge.
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General Two Stroke Talk / Re: Poll of some sorts. Answer honesty please.
« on: August 11, 2011, 02:25:38 AM »
I own both, ride both, and enjoy both.
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General Two Stroke Talk / Re: Reed's Crash
« on: July 19, 2011, 03:02:53 PM »Pretty amazing to get a 5th overall after that!
I guess I am a bit behind on my lingo, what did "roll up the windows" pertain to? Erin Bates said he had a lot of time to "roll up the windows" during his post race interview.
Kids of today and their cars with electric windows. :p refers to chaddles flapping his arms round like, well, he is winding up the windows in a car.
Gracias. It looked more like swimming upstream, but fitting none the less.
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General Two Stroke Talk / Re: Reed's Crash
« on: July 18, 2011, 04:02:29 PM »
Pretty amazing to get a 5th overall after that!
I guess I am a bit behind on my lingo, what did "roll up the windows" pertain to? Erin Bates said he had a lot of time to "roll up the windows" during his post race interview.
I guess I am a bit behind on my lingo, what did "roll up the windows" pertain to? Erin Bates said he had a lot of time to "roll up the windows" during his post race interview.
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Photos & Videos / Re: Barcia on a 250 2t at Red Bud
« on: July 14, 2011, 05:15:11 PM »weird is that he rips on a 2 stroke bike, but not as much on a 4 stroke. he's just and average rider among 250f riders... in my point of view!
If it is average to be the Lites East SC champ, then yes he is average.....
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Photos & Videos / Re: Barcia on a 250 2t at Red Bud
« on: July 13, 2011, 03:13:24 PM »
I wonder why he is riding LaRocco's bike? Maybe the mechanics are still working on getting his bike started.
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Technical / Re: 07 YZ450F Suspension on a YZ250
« on: July 06, 2011, 04:30:42 PM »
I forgot to ask him. I don't see why they can't, the physical dimensions are very close.
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Technical / Re: 07 YZ450F Suspension on a YZ250
« on: July 05, 2011, 02:22:08 PM »Well since you are planning to take the 250 suspension off for servicing, why not just do a little extra wrenching and try the 450 stuff? Best way to find out.
Seriously someone here might know for sure...
Well, it does fit, but I don't know how it will ride. I have read that the valving is different, which was what I was assuming but was hoping someone would know a bit more specifically what is different.
I got lucky and the suspension shop (Pro-Action NC) is giving me a really quick turn around on my 250's kit so I will only be without a bike for a day or so.
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Technical / 07 YZ450F Suspension on a YZ250
« on: July 04, 2011, 07:37:52 AM »
I have an "extra" 2007 YZ450F in the garage. Are the forks/shock the same as my 2006 YZ250? I want to get a set revalved and wanted something to ride in the interim. Since I don't like riding the 450F, I would like to put the forks/shock on my YZ.
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Technical / Re: Do I need race fuel?
« on: May 26, 2011, 08:48:28 AM »
Last night I decided to pull the head off just to have a look at the cylinder. I could see no signs of damage from detonation, and I would suspect the jetting to be a bit rich although the plug likes just about right.
I am going to do a little scouting around to see if I can find a local station with race fuel as it is not a matter of the expense but more of the hassle to always have some on hand. I guess the 4 strokes have babied me and I am used to grabbing fuel on my way to the track.
I am going to do a little scouting around to see if I can find a local station with race fuel as it is not a matter of the expense but more of the hassle to always have some on hand. I guess the 4 strokes have babied me and I am used to grabbing fuel on my way to the track.
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Technical / Re: Do I need race fuel?
« on: May 26, 2011, 08:44:47 AM »My advice is not to use race fuel if you can get away without it. My reasoning is this: As a Vet C rider, the performance gain from the fuel will not be worth the added expense. You would be better off saving the pennies (nickels and quarters!) and putting the money to a riding clinic or school or a new set of tires.
The caveat of course is detonation and piston life. Be sure jetting is correct and you get good fuel. SAMS CLUB or the 7-11 down the street will not have the best quality pump gas. You might pay a little more, but in the long run, it is worth it. Also, at the more expensive gas stations, you stand a better chance of finding non-alcoholic fuel.
Back when I was traveling a lot to the races, I noticed higher gas mileage in my tow vehicle if I spent the little bit extra on good gas. It always worked out in the long run.
Not to sound ignorant, but how do you tell which gas stations sell good fuel? I chose Sunoco because of word of mouth.
And yes, I have no need for the performance gain, the YZ250 is plenty of bike for me and the class(es) I race. I just wanted to treat it properly so it won't fail prematurely.
Thanks
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Technical / Re: Do I need race fuel?
« on: May 25, 2011, 01:04:29 PM »If I remember correctly, the '06 did run right on the edge of detonation with pump gas. I think Yamaha put a different needle in the carb for '07 to cure this. If you don't want to run race gas, check into the new needle.
A needle change seems much simpler, and cheaper, than finding race fuel to ride.
I appreciate the advice.
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Technical / Do I need race fuel?
« on: May 25, 2011, 10:10:04 AM »
I have a 2006 YZ250 and have been riding it for a couple months. It seems to run well, but I am coming from 3 previous 4 stroke bikes so I am not well versed in 2 stroke performance.
Two other riders that I know that have quite a bit more knowledge than me on 2 strokes say that they went through pistons within 5 hours on their YZ250's because they weren't running high enough octane fuel (race fuel). They both said they ran premium but recommended that if I continue to ride/race my YZ that I run race fuel, or at a minimum blend it with premium gasoline.
This seems like a huge distraction for me as race fuel isn't immediately available, not to mention expensive.
Maybe some background is helpful; I ride 2 -3 days a week all MX tracks. I race monthly in C and Vet classes, so nothing too fast, but still competitive. I am mechanically inclined, I rebuilt the top ends' of my 4 strokes in the past and am not afraid of rebuilding my 2 stroke now.
The bike runs well, the spark plug tells me the jetting is reasonable. I currently use Sunoco 93 octane with 32:1 S2 oil. I haven't pulled the head to look at the piston, but plan on doing that in the near future. I do however notice some odd sounds from my YZ but because I am not used to 2 strokes they may be normal. I cannot tell if it is detonation or just "2 stroke rattle".
Any advice?
Two other riders that I know that have quite a bit more knowledge than me on 2 strokes say that they went through pistons within 5 hours on their YZ250's because they weren't running high enough octane fuel (race fuel). They both said they ran premium but recommended that if I continue to ride/race my YZ that I run race fuel, or at a minimum blend it with premium gasoline.
This seems like a huge distraction for me as race fuel isn't immediately available, not to mention expensive.
Maybe some background is helpful; I ride 2 -3 days a week all MX tracks. I race monthly in C and Vet classes, so nothing too fast, but still competitive. I am mechanically inclined, I rebuilt the top ends' of my 4 strokes in the past and am not afraid of rebuilding my 2 stroke now.
The bike runs well, the spark plug tells me the jetting is reasonable. I currently use Sunoco 93 octane with 32:1 S2 oil. I haven't pulled the head to look at the piston, but plan on doing that in the near future. I do however notice some odd sounds from my YZ but because I am not used to 2 strokes they may be normal. I cannot tell if it is detonation or just "2 stroke rattle".
Any advice?
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