Jump to content
Sign in to follow this  

2001 rm 259 died

Recommended Posts

Hey,

I bought this rm250 in what seemed a good condition. I went for a ride today, and it seemed like a fouled a plug, so I replaced it, it wouldn't start. I pulled it out again and the plug was still dry. I'm in the process of checking the carny and jets. Any other idea what it could be? Fuel runs out the over flow in the carby as well.

Thanks for any and all suggestions

Edited by ejboaklyn_crf250r

Share this post


Link to post
Share on other sites

Run a compression test, check for spark. Cover the basics and report back

Edited by Sqwid

Share this post


Link to post
Share on other sites

You can pick up a compression tester for fairly cheap at a local automotive store. They are a must have for 2 stroke owners. You'll find yourself using it often, worth the investment.

Share this post


Link to post
Share on other sites

My 250 came apart on me one cold'n'crisp winter day.  Little to no warm up.   It was a club race and it was a relay harescrambles and the bikes had sat all night and we weren't allowed to start them until we had the wrist band.  I just couldn't wait and wanted to catch a guy who had just left before me.  I heard it come apart and rode a couple miles back on the course (ending in a endurocross section) to the truck.  wouldn't idle and had to keep the revs up so it would have some compression to run. :D

 

You HAD to have heard that com apart.

 

26004_1392096288713_4564728_n.jpg

 

26004_1392096408716_2479310_n.jpg

 

26004_1392096448717_2861381_n.jpg

Share this post


Link to post
Share on other sites

Did your bottom end go as well or was that all okay when it happen?

 

Mine was OK.  It was a concern for sure.  My bits left the cylinder to the exhaust pretty quick by the amount of damage to my piston/head. 

 

Air is coming up from the bottom end so parts going down there is less likely than it going out the exhaust port into the pipe.  Yours looks pretty hammered.

 

I would evaluate your crank and decide if you want to split the case.  I did not.  You may need to but that is your call.  if the crank goes you can have bigger problems.  I have put 2 more top ends (One a year regardless of wear) in the old girl since this picture with no issues.

 

I know why mine came apart but you should also try and find why yours came apart or you could see this sight again soon enough.

 

Good luck. 

Share this post


Link to post
Share on other sites

Thanks. We checked the crank and it is tight. No play at all so I'm pretty happy about that. But I have to send the head away to get resleeved as the is a chip on the exhaust port. It could be the problem or it was a fuel related problem. Which I am going to start mixing 40:1 after I rebuild and jet accordingly.

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  

×