Sign in to follow this  
Followers 0
tmeyer37

yz400 hp rating

7 posts in this topic

Does anyone happen to know the Horse power rating for a 99 yz400f. Ive got one and im just curious what the stock rating for the bike is. I was thinking somewheres around mid 50's but im not sure

Share this post


Link to post
Share on other sites

im not sure but i know the 450s are mid 50`s, so if i was a betting man id bet an ol 400 is pumping out low 40`s

Share this post


Link to post
Share on other sites

An '06 YZ450 produces just at 50 RWHP (stock). An '08 puts out at 52, an '03 around 47, a good 426 does around 46, and a 400 is at about 44, according to the best charts I can remember.

Share this post


Link to post
Share on other sites

I second Grayracer's numbers. That's in the area of a 250 smoker, but where the 400 dominates is TORQUE! That's why the 250 smudge pots were out-gunned by the 400's.

Share this post


Link to post
Share on other sites

Grey is right on the numbers I dyno'd a stock 04 at 46hp and I had a 03 at the time with a few mods at 50.

Share this post


Link to post
Share on other sites

Was just searching around for some other stuff, and came across an old Motorcycle.com article saying 43hp

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