got an 03 yz450f. what size carb are they using on this bike (36,37 etc)
My 04' uses the 39mm. I'm pretty positive the 03' used the same carb.
if you plan on changing them, i hear it is the wost thing you could ever do ever to a 4-stroke mx engine. i hear its nothing but a hand-full of headaches. thats just what i heard so don't quote me on that.
I've heard the same thing.....Don't switch to another manufacturer; it's nothing but headaches.
I've found my stock carb to be just fine. Although I recommend putting in a j/d jetting kit, it definately helps give crisper response.
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