Sign in to follow this  
Followers 0
frankllynn

98 yz400f cam mod

12 posts in this topic

Do anyone know for a fact if advancing the exuast cam one tooth on the 98 yz400 will change it to wr timing or better yet has anyone done it?

Share this post


Link to post
Share on other sites

Why can I not find any articles or threads where people have done it.

I see no reason for it not to work, but I'm no engineer. I would love to here from some people that have done this and what changes they felt.

Share this post


Link to post
Share on other sites

It does work (again). You don't hear much about it because most people don't want a YZ400 with less power.

Share this post


Link to post
Share on other sites
Good point. I am looking for smoother power

Then leave your cams alone and do a search on flywheels. A much better option.

Share this post


Link to post
Share on other sites

i have purchased a 10 oz zip ty for mine... i will post back results after i get it and install. me thinks i will like it

jay

Share this post


Link to post
Share on other sites

so what would the wr timing do fro the yz. All the power is a 1/2 throttle and up. I would like to have better lower rpm power even if I loose some of the upper rpm power

Share this post


Link to post
Share on other sites

It does not so much give more power at lower rpm as it makes the lower rpm performance smoother. In fact, if anything, it detracts from the power across the board. It will be happier to run at 2000-3000 rpm, but it will be less snappy and more sluggish overall.

It's not an irreversible mod, in any case, so you can try it and see how you like it at no cost or loss, other than your time.

Share this post


Link to post
Share on other sites

Well I changed the timing..Pretty easy mod if you dont drop the key into the motor. Not a considerable difference but worth the money $0.00

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0