I'm want more power on my 300ex without spending a fortune. I have a K&N with a precharger, big gun-full system, Wiseco high compression piston, and i'm running 95 octane gas. Will the 400ex carb. fit on my 300ex?
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Registered User
I'm want more power on my 300ex without spending a fortune. I have a K&N with a precharger, big gun-full system, Wiseco high compression piston, and i'm running 95 octane gas. Will the 400ex carb. fit on my 300ex?
'GO CAM'
yes
Senior Member
Yes it will fit. Its a pain getting the stock 300 carb boot over the 400 carb though. You need to find a used 350x carb boot its much easier to get on. Also the 400 carb will mainly only help on top end.
Rissler's Extreme ATV
01 Roll Design Lobo 250R with a few extras
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NJ DEVILS
are you sure about that?only top end,nvm then i was going to get one but not no more,im looking for bottom to middle range of more power
JOHN
New Jersey Devils
2008 YFZ 450...my new money pit
Filthy Revengence Racing
C&D Racing
B&K Performance
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Senior Member
I am going to have to disagree just a little. When I put the 400ex carb on my 250x, I noticed a much stronger midrange pull and a little more on the top end. I do have a few motor mods and was prob. choked with the old 250x carb pretty bad, but the 400ex carb actually impressed me!
Now, if I only had a good pipe to bring it all together.
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