Sign in to follow this  
Followers 0
bmah

'07 and newer WR450 base valves

8 posts in this topic

Why isn't it posted as a stickie in the performance mod section about how truly worthless the stock '07 and newer WR450 forks are? The base valve in these forks is totally untunable in stock form and riding the bike with the stock fork is akin to riding a hobby horse. When those 'poppet valve' springs compress off of the piston seat, there is no more compression damping and the fork is essentially a spring for the remainder of it's travel in the compression stroke. I recently modified the base valve by removing the poppet valve spring assembly and adding a conventional shim stack in it's place. The results were amazing! I now have a totally different and predictable handling bike. This should not be a cryptic mod, I would like to see the WR community better informed about the shortcomings of :banghead: this fork.

Share this post


Link to post
Share on other sites

Write it up and send it to the moderator suggesting that it should be added as a sticky.

trailhead

Share this post


Link to post
Share on other sites

I agree, the stock base valves are a joke and I can only assume that they were designed for gentle trail riding. I installed a set of Pro-Action 3 stage valves and the difference is amazing, no more deflecting or bottoming on the trail junk I ride on. WR Dave

Share this post


Link to post
Share on other sites

+3 on the WR base valves being total garbage! The engineer who designed it should be caned.

Share this post


Link to post
Share on other sites

:excuseme: I'd like to see some instruction on an inexpensive fork upgrade. Some parts I could buy and install myself and not cost $450. Something that would make an old fart more comfortable on a ride.

Todd

Share this post


Link to post
Share on other sites

Meh, my '09WR450F feels like I'm riding on a marshmallow. Yuck!

It's going to RaceTech next Monday unless someone can convince me to go to Factory Connection since FC's a bit more spendy.

Share this post


Link to post
Share on other sites

This is the route that I took with my '07. The difference is well worth the trouble! I'm still amazed Yamaha would offer this fork on a "competitive" motorcycle. What were they thinking? I'm referring to the link posted above, removing the blasted spring poppet valve.

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