Jump to content

XS250 won’t rev cleanly

This post is 707 days old and we'd rather you create a new post instead of adding to this one. You can't reply in this post.

Recommended Posts

Hi, I have an xs 250 with aftermarket filters & 2into1 exhaust, which runs ok when being revved, but when it is warm it won’t rev cleanly from tickover & often stalls if I blip the throttle. Can be really difficult to pull away with out really revving.

I’ve cleaned the carbs with ultrasonic, so they are re clean & checked the timing is ok. Presume it is something to do with the jetting, but don’t know much about jetting & where to get jets if that is the case.

Any help would be appreciated…


Link to comment
Share on other sites

Do you want an ad-free experience? Join today and help support the Yamaha Owners Club.
  • Moderator

CV carbs need a liner airflow to work properly.

I used the pipes to the original filters and popped some filter over them.


to do a proper job, you'll need to get o a dyno to dial in the fuelling

Link to comment
Share on other sites

  • Who's Online (See full list)

  • Recently Browsing

    • No registered users viewing this page.
  • Create New...