400ex losing power or something

[sick_ss/sc]

ok i got a 99 400ex..it starts fine..and runs good...but recently its like when i go full throttle the engine whines out but it wont like move..i dont know whats wrong..please help

[Scro]

It's not pulling at all when you give it full throttle? When was the last time you checked your clutches?

[sick_ss/sc]

i dont know how to man..i just got the bike..im learning..and when i give it full throttle it pulls..just not as hard as it did 5 days ago when i parked it.,.

[Scro]

Without being there to feel what it's doing, it's hard to pinpoint the problem. I would start by checking the clutches to make sure they are in good condition, and not slipping.

Is it smoking at all? Do you still have the parking brake on, by chance?

[sick_ss/sc]

na no parking brake..and nope no smoke..like i said runs real good..just when i give it full throttle..it dosent wanna go like it use to 5 days ago..the engine still revs high...so im thinking clutch..how much does that cost?? and how do u do it??

[Scro]

The clutches aren't that expensive. If the basket is grooved though, it may be a little more.

Your best bet would to get a service manual, and do the work yourself. It will tell you how to do everything on the bike, step-by-step. Just search for 400ex service manual on ebay. They are very helpful.

[Wr3sTl3b0y]

clutch plates run from around 50 dollars a set to 100 dollars for ebc heavy duty .. thats what i got for my 400ex last year and i still havnt been able to get it working right i been running on a old clutch slipping like a *****

[Scro]

Originally posted by Wr3sTl3b0y
clutch plates run from around 50 dollars a set to 100 dollars for ebc heavy duty .. thats what i got for my 400ex last year and i still havnt been able to get it working right i been running on a old clutch slipping like a *****

I've never replaced the clutches on a 400ex, but I've always had the best luck out of stock components on my 450.

[omeeomy]

check the cable adjusters at both places see if the helps
one on the bars and one down by the clutch lever
that might need adj
but it does tend to have the clutch plates go in the higher gears is were youll notice it first

[sick_ss/sc]

thanks guys..yea imma order a service manual

[omeeomy]

look on here theres a pdf file some were that you can down load
and dont worrie the cluthes are rather easy to change
just remember proper oil for wet clutches and soak em good first

[sick_ss/sc]

Originally posted by omeeomy
check the cable adjusters at both places see if the helps
one on the bars and one down by the clutch lever
that might need adj
but it does tend to have the clutch plates go in the higher gears is were youll notice it first

dude u were right..i adjusted the one near the back break..its mcnasty again..thanks so much man