Sign in to follow this  
Followers 0
2002-426

does any body know

6 posts in this topic

You'll hear anywhere from 42 to 48 or 49....

It's all over the place, all I know is it's plenty for any human rider on dirt unless you're racing in Baja or something.

Josh

Share this post


Link to post
Share on other sites

One of the reasons that it's "all over the place" is that dynos as they stand today are not particularly precise instruments in absolute terms, and the results will vary. They're really much more useful for determining whether a change made to an engine made it stronger or not, and for optimizing an engine's output.

When you see numbers for stock bikes, you have to ask whether the testers did anything to make the bike run at its best, or did they just drag it in off the truck and run it? That last is typical of the dyno graphs some performance part manufacturers use to show their stuff off. They just run a stocker with off the shelf jetting and compare that to the same bike tuned razor sharp with their goodies on it to make the difference bigger.

One of the most reliable series of pipe and bike shootouts over the years has been Dirt Bike Magazine. They run their tests at the FMF dyno facility, and generally make a good effort to get the most out of the stock bikes. For that reason, that info is a good gauge of what a stock bike's power actually is.

A good, healthy YZ426 should turn out 45-46 hp in stock trim.

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