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
hybridz77

Spark Plug Options

9 posts in this topic

Well its time for a plug change, so I thought I would ask what different plug brands and types everyone likes/uses. Plus this is my first plug change with my 03 WR450 (of 1 year), curious if anyone found any improvements with different plugs?? thanks

Share this post


Link to post
Share on other sites

Yamaha recommends you use either a CR8E or CR9E for heat range.

I find the CR8E IX iridium plugs are fine, they last a very long time.

I feel no difference between the 8E or 9E either.

Share this post


Link to post
Share on other sites
:ride: I've always ran the CR8E. I'll swap them out every season - for no other reason than to do so. Maybe next time I'll try the iridium, if its good enough for Indy, then it must be good enough for me :thumbsup:

Share this post


Link to post
Share on other sites
I use the NGK Iridium CR8E - IX. They work well. No fouling. Clean dry look when inspecting them. :thumbsup:

I started running Iridium plugs in all my bikes. I little pricey but IMO worth it :ride:

Share this post


Link to post
Share on other sites

I typically run CR8EI and it works well, but for some reason I thought I would try the CR9EI. And it made the bike idle rough and stall and lower RPMs, but seems to work great at higher RPMs. Not sure if it has something to do with the heat range or what, but I guess it is time to switch back and see if the issues go away. Also the bike would only start with the choke on, even when hot. Seems strange that a plug could do that much but it seemed too.

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