Jump to content
Sign in to follow this  

Need jetting info for a 1985 RM250

Recommended Posts

I have a 1985 RM250 which I just bought a new carb for.  The carb is a TM38-85.   I have a service manual coming, but I'm trying to get this bike running this weekend.


I can't find any info online for the proper stock jetting for around my year.  Most of the info online is for newer bikes, specifically 1989 and above.  


The current jetting:

Main 310

Pilot 40

Needle: 6FJ40 3rd clip

Float height ???


I can't get it to even sputter, but I'm also not that great at kick starting.  It gets a spark.   I am going to check the float height and set it around 15mm as I've seen 14+-1 and 16 +-1 specs online.  Fuel is definitely getting TO the carb, from there I don't know.


I saw online 1989 specs have a 370 main jet and a 55 pilot, and 1992's switch to a 170 main jet, i'm guessing a new carb for 1992.


Does anybody happen to have this info?

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

Reply with:

Sign in to follow this