Posts
892
Joined
9/27/2006
Location
Humboldt, CA
US
I just had them build me a 300, I supplied the factory 300 kit and they assembled and decked the head for $420. This is an absolute game changer, I’m blown away with how much of an improvement this made for track riding. The only downfall I’ve found with racing two strokes against 450’s is I’m running 2nd-4th while most 450’s can just use third the entire track. Now I can roll all but the slowest corners in 3rd. Throttle response is insane, and it revs so much farther than the stock 250 did. The only downfall is I don’t see how I’ll ever be satisfied riding a 250 again, I’m gonna have to send off my new bikes right for the showroom now.
Is the bike easier to ride now compared to the stock 250? I mean does it wear you out quicker?
Same sort of things deck the head checked the port timing etc.
The Shop
With it being a 300 and naturally having more bottom end I opted for more over rev. To me it’s way easier to ride as you can, if ya want, just roll third the entire track. It also comes to life instantly now, I find that much less tiresome you don’t have to rail a corner in second and bang third down the straight then back to second etc.
When you say stock jetting, what is stock jetting for a 300 sx? Is it the same as the 250 sx? 35 pilot 42-71 needle in third clip position and 450 main?
I did not change the jetting, same as it came off the showroom floor as a 250sx.
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