Whats wrong with my 400

[greco400]

Today i had a buddie come over w/ 400ex all stock with rear klaws on and baffel out and its jetted a lil rich and he gets me in the long wrong like 400 feet I got a hetrick full pipe Jetted correct piston stockbore bald 22 tires and soon as i hit 4th gear ge passes me If i would go down a rear sproket or front wheel it help me get me threw the gears faster?

thanks!!

[Pappy]

id say the tires are what seems to be the issue on a short drag race like that.

or could it be the pipe just doesnt do that much to the stock engine? lol:scary: or maybe the bald tires are breakin loose and he just rolls on past ya...lol


(the sproket could be whats needed;) )

[400exr]

How old is your 400 and how old is his 400?? The piston wear (compression) can make a big difference. Also what size of sprocket are you running? I've noticed that 22" tires can get pretty heavy, and that robs alot of power.

[greco400]

mines a 00 and my piston is bout a a year old. His is a 03 and My tires do break lose in the start and thank you for the fast reply's!!:) I was thinking going down one sproket I beat him from 2-3 then im widning out 3rd and i shift into 4th and hes already in 4th passing me i got a whole of low end and my qaud runs like a raped animal from 1-3 4th gear is not to good then i shift into 5th and its like a 2 stroke it keeps pulling :confused: maybe my qaud got some spell on it :blah: but i don't know much bout im going but a 11:1 je piston or ross i will run no base gasket like hondabond or something or permatex i think it is? & like a one or 2 layer head gasket Thanks!

[cals400ex]

what jetting you running??

i would put a 14 tooth front sprocket on and see how it runs. also, make sure your throttle cable only has around 1/8-1/4 inch of slack in it. if there is more, you will be hurting the power. i have a 14 tooth for sale if interested

[schuie]

its your tires, i had 22's on my ex and had the same problem, i changed to 20's and it was a big difference in the top end

[priebo15]

sounds like its the tires, heavy bald 22''

[chucked]

How heavy are you, and how heavy is your friend?