got beat.........

[zoom400ex]

I raced a friend the other day with a 400ex. his is completely stock besides shaved fenders, and i have shaved fenders, white bros e series slipon with a 160main jet,and a k&n filter. i weigh about 195 and he weighs like 170. when we took off i got to top speed faster but he past me when we got to top speed.........:ermm: i am seriously thinking into investing into some motor mods like a hotcam stage2 and a ross high compression piston! i am getting sick of being beaten by z 400's and some stock 400ex's........anyone give some info i what i should do to get up to speed with everyone else? thanks

[UglyMotha™]

how bout if you figure out what's wrong with your bike first like try jetting it right that could make all the differance in the world cause a 160 mj is a huge *** jet for just a slip on

[F-16Guy]

Originally posted by UglyMotha™
how bout if you figure out what's wrong with your bike first like try jetting it right that could make all the differance in the world cause a 160 mj is a huge *** jet for just a slip on
What he said. 160 is way fat.

[wilkin250r]

Some of the slip-on pipes will shift the powerband lower, it happened on my girlfriend's quad. She put her pipe on, and the bottom end was great, but the top end suffered.

[JustRace]

Do you both have the same gearing?

[RuffRyder400ex]

Originally posted by wilkin250r
Some of the slip-on pipes will shift the powerband lower, it happened on my girlfriend's quad. She put her pipe on, and the bottom end was great, but the top end suffered.
i agree. my dad had a stilleto pipe on his 400. and the low end power gain was crazy i never felt so much power from just a slip on the thing was loud as heck to. but it did feel like he lost some top

[lars]

i know how you feal i went out riden all day sat and got beat all over the place soon as i got out of the woods and on the gravel roads which is part of the trails system here a couple guys hade raptors they were fast but my buddie i went with seemed to be the fastest on his yamaha tri-z 3 wheeler on the long hall anyways im going to have to invest in some motor mods also real soon :cool:

[UglyMotha™]

well just a little food for thought, i had a e-series slip-on back in the day and a k&n filter with the choke removed and never once loss to a stock z so i'm still leaning towards the jetting cause even if you live in alaska that still sounds to large

[wilkin250r]

I agree with Ugly ^ a 160 sounds huge. My GF was running a 148. I'm just saying, if the jetting doesn't fix the problem, it may be just because the pipe shifted the powerband lower...

[RIjon]

go on a diet

[Wheelie]

I agree, a 160 is too much. Step down to a 152 or 155 and try again.

[lex luger]

his 160 is also a mikuni too. thats like a 140 something in k. i doubt its lean, but maybe. toy with the plates too in the pipe.

[chad502ex]

Originally posted by Wheelie
I agree, a 160 is too much. Step down to a 152 or 155 and try again.

yup, 152 or 155 for slip-on. I agree with most here on this one.

Chad502ex.com

[RAPTORAZ]

The combo (cam & piston) in my signature only cost me about $300.00 and it easily beats piped Z400's.

[RED121572]

If you havent done so, check your throttle cable. Make sure that the carb is opening up all the way when you apply full throttle.

[zoom400ex]

Originally posted by RIjon
go on a diet



oh ya we switched wheelers and i won on his.........

[zoom400ex]

ok i am gonna step it down ot a 155 i think and i just got my valves adjusted if that my help seeing how they were ticking like a mofo...........

[lex luger]

putta advancement key on the crank, and dont tell no one.

[EHSRACING]

a 160 main its not really that big if he is running a k&n jet or equiv. but if its a dyna or equiv it is large they have a different # to actual size comparison which is stupid in my opinoin but they do it anyway. i would check your plug and go from there

[kgbg]

How can anyone suggest a jet size without knowing altitude, filter, air box mods?

[kgbg]

How can anyone suggest a jet size without knowing altitude, filter, air box mods?

[aussieex]

Im runnin a 165 main and only have slip-on and K&N it seems to rev out ok but I havent done a plug check yet I agree with what was said before about different brand jets having different numbers for the same size jet I dont know what mine is but it would be nice to know, And Im at sea level!!