LA Sleeve 400 kit for YZ450

BTW, wouldn't a 03 YZ450 motor in a 2007 chassis be the perfect bike? (with an auto-clutch, of course) :thumbsup:
I would have agreed with that before I owned and rode an '06. The '03 engine is much more thrilling; the '06 is vastly more useful, and the bike is noticeably faster because of it.

Your "butt dyno" is lying to you.

So how long before we see a 350cc kit when the AMA makes the stupid horrible decision to restrict the "Motocross class" to 350cc? :thumbsup: Looks like we'll all be riding mopeds with 12" of suspension travel before it's over with. Ha!

I keep thinking that someday, racers will get tired of the AMA and start over. I've been thinking that from time to time since 1969.

I keep thinking that someday, racers will get tired of the AMA and start over. I've been thinking that from time to time since 1969.

amen...that would be the single best idea that riders and manufacturers would both flock to....:thumbsup:

amen...that would be the single best idea that riders and manufacturers would both flock to....:thumbsup:

I triple that. It irritates the hell out of me every time I watch the races on on Speed and they keep reminding you to join the AMA because they do oh so much for us... all the while, another riding area gets shut down. Kiss my grits, AMA.

IMO, the stock 450 lacks the punch that the 426's have. I rode a bone stock 07 and was pretty disappointed with the power. The handling and suspension was awesome, but the power delivery was too slow for me.

I couldn't have said it better myself! My brother has an 06' 450 and we have ran them in the hayfields and I can either get him every time or it is dead even in the end. I was expecting him to eat my 426 up... but that's never been the case.

Granted, the 450 seems to have a more "even" power delivery, but it don't seem to have anything on my 426.

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