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
mhays01

Need advise on cold weather missing problem

3 posts in this topic

I rode friday when the temp was around 65f. It ran fine.

On sunday it was in the mid 30's and it would start missing about 1/4 throttle.

I changed the MJ from 172 to 180. It ran better for a short time then started missing again.

I had this same problem last fall when it was cold.

Any help would be appreciated.

Mike

99 WR400 FMF Powerbomb & PCIV2

Share this post


Link to post
Share on other sites

try the PAJ Screw. this goes in the belmouth face of the carb. the one you have at present is a 75 if it's still got all the pipes etc on the side. it should be at least a No 100, a No 125 would be even better.

the slow speed circuit is an enrichening circuit. the more air we introduce, the more fuel it will pick up. it's fast, it's well atomized (mixed).

your main jet should be taken back to how you had it. it's too rich up top. you've used a full throttle answer to a 1/4 throttle problem.

Taffy

2 people like this

Share this post


Link to post
Share on other sites

try the PAJ Screw. this goes in the belmouth face of the carb. the one you have at present is a 75 if it's still got all the pipes etc on the side. it should be at least a No 100, a No 125 would be even better.

the slow speed circuit is an enrichening circuit. the more air we introduce, the more fuel it will pick up. it's fast, it's well atomized (mixed).

your main jet should be taken back to how you had it. it's too rich up top. you've used a full throttle answer to a 1/4 throttle problem.

Taffy

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