poll

[400exrider720]

How many of you who have rebuilt a 400 changed the cam chain? I am building a 416 with 11:1 compression and need to know if it is absolutely necessary to replace the cam chain. Thanks for the responses.

[blasterfreak99]

i don't think that it is absolutely necessary but it would be a good idea to do so. especially if it has been a long time since it has been changed. because it could strech and come off somewhere leaving you stranded

[416exriden]

ya i would recomend it i had to do it on mine and i put a crf450 timing chain on b/c its stronger than the stock 400ex and fits fine. ;)

[sportraxkid]

When I put the 440 kit in 00 400ex I never replaced my timing chain but the bike had low hours back then. I rode the crap out of it for 3 years and im friend's with the person who has it now and still hasn't had any problems.

[hondaracer57]

it may or maynot break but dude for an extra like 34 bucks buy a new one.if u dont and it breaks it will cost u alot more then 34 bucks to fix..u know what i mean..

[jeremy_283]

it wont break hardley ever...... they just stretch

[smoothie]

stretching and giving you some poor timing. get a new one and be done with it.

[hondaracer57]

dude trust me they will break!!!he is putin more compression and more power to the motor...thats alot more stress on a stock timing chain.. but like i said 34 bucks man what can it hurt....

[firefighterjosh]

Buy a new one