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
desmo900

First ride on new 650R

7 posts in this topic

Hello everyone. This group has been very helpful to me. While waiting for my forks and shock to get new spings and valving I have made a host of improvements based on the knowlege gained from all of you.

Once more i need your advice.

On my first ride with the bike the engine would not return to idle when the throttle was released. This happens only when the engine is warm. Im thinking this maybe due to the overly lean pilot jet. The second problem is the the engine will only run with the choke in the middle position or closed when starting. If i open the choke all the way even after it is fully warmed up, it will die right away. Is this part of the lean jetting as well? I have not yet uncorked my pig, because I'm waiting for my skills to catch up with the bike. My last dirt bike was many moons ago.

Thank you for all your help.

Jim cunningham

Share this post


Link to post
Share on other sites

I'm about 99.9% sure it's due to the lean-ness of the pig. Personally I'd uncork it now, it's a fourstroke, pretty manageable power-wise. It's probably running so lean, it could cause damage. The lean pilot circuit you have now will cause the off-idle run-on your seeing.

Share this post


Link to post
Share on other sites

Desmo, first of all, the high idle upon releasing the throttle is pretty common for a new 650R. My theory is that the bike is just way too lean in stock condition. Another theory is that the carb piston is tight and requires some use to break it in. I think it's because it's too lean.

You should do the uncorking/jetting procedure as soon as possible. Mine did the high idle when it was stock also, but I uncorked/jetted it, and it ran perfect, as it should.

Don't worry about it having too much power, I'm sure you can handle it, it's good smooth 4-stroke power, it's very very snappy off the low end when uncorked, but that's a good thing.

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