HEADS UP!!!

Site upgrade in progress... Core site functions are working, but some non-critical features/functions will be temporarily unavailable while we work to restore them over the next couple of weeks.

Please post any bugs you encounter, but before you do, check to see if it's already listed.

Thanks for your patience while we work to improve the community.

Sign in to follow this  
Followers 0
DTM Industries

what is the top speed of a 450

12 posts in this topic

I have a 2006 YZ450 im wondering what is the top speed "MPH" on this bike?

If any one has toped it out what was you best all around gear slection ( spocket size front of rear ). Im setting this bike up for desert racing & besides changing out the trans gears with WR450 gears what would the all around spocket sizing be best for desert racing- TOP SPEED & TIGHT SECTIONS ?

Share this post


Link to post
Share on other sites

My 06 was clocked last year at 141km/h (84 mph) when running side by side with my buds WR who had a speedo. My sprockets were 13T front and 50T in the back......now I have a 49T in the back so I'm sure I could squeeze a couple more MPH.

All be it we were flying down a gravel road so there was a little wheel spin and I don't know how accurate his speedo was so this is more an estimate than actual.

Share this post


Link to post
Share on other sites

I run desert races with my '06, and I run it at 13/48. I also run a Rekluse Z-Start Pro clutch which helps enormously with the tight stuff and the "little surprises" some of the D38 clubs like to toss into the mix. It's more expensive than a WR trans (which is an excellent swap, BTW), but it's much easier to install.

With this set up, I run out of gear only on the fastest lake bed sections, and it would be nice not to have that happen, but it's not a real big problem. Not so many of those sections included usually. Mainly, I don't like running it at 10K with the throttle rolled back for a quarter mile at a time.

I suppose, with the Rekluse, I could get away with a 47 or something like 14/50, but it works well enough for me as is that I'm not strongly motivated to address the matter.

Share this post


Link to post
Share on other sites

On my 2008 with stock gearing 88mph on a paved road as per my gps. If i would of had the flux capaciters working i could of gone back to the future!

Share this post


Link to post
Share on other sites

Not quite the reply you're seeking, but after this weekend the stock geared YZF is dead even with our late 80s CR500 which has absolutely no over-rev (where is that larger main jet??). Feels like a 4000rpm redline. :cheers:

Share this post


Link to post
Share on other sites

My stock 2006 YZ450 ran a consistant 86 on Soggy dry lake bed in Johnson Valley using a hand held GPS. Weather was Cooooold!!!

Share this post


Link to post
Share on other sites

I have tried 13-49 13-50 and 15-50 i think 14-50 is what i am going for next because the bike just doesn't hit the rev limiter with 15-50 so i would recommend 14-50 also with a 15 tooth front you have to remove the case saver

Share this post


Link to post
Share on other sites

My 09 tops at 88-89 with stock sprockets on pavement. Speed was recorded with hand held GPS , double checked with gps on my phone. Phone had it at 88mph

Share this post


Link to post
Share on other sites

For those who think the bike will go faster if it's geared to hit the rev limit, bear in mind that the bike makes upward of 4 more horsepower at 10,200 then it does at 11,500.

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