A forum for owners of Yamaha TTR250 trail and enduro bikes!

Members Login
Username 
 
Password 
    Remember Me  
Post Info TOPIC: 2005 ttr low compression, no start, rings, valves


Newbie

Status: Offline
Posts: 3
Date:
2005 ttr low compression, no start, rings, valves
Permalink  
 


I'm kicking myself a bit for this one, but let's see if I can get it running at least. 

Low compression (45-50 dry), no spark (before me), new wiring harness and tdi box installed by questionable methacanics...

Leakdown and simple tests indicate carb, valves, rings, or something bigger. 

After top end breakdown. I'm thinking rings!  Look at the blowby... needs carb job too. But the valves are still in spec, closely. 

What would you do? 

The head looks OK, the bore OK, the rings no. Rod slop, acceptable. Valves might need a job... but I couldn't get this thing attempting to firing on ether either. And they're tight. Bore mics out at 73, pretty close. 

Threw it back together for the night.

I'm Thinking new piston and rings, not gonna get to perfection, just want it running. Plus would like any advice on upgrade or mods that might be helpful at this point of teardown?. Help? 

Think the previous owner, ran it rich for too long, burnt up the rings. Thoughts?

 



Attachments
__________________


Super Guru

Status: Offline
Posts: 1387
Date:
Permalink  
 

Replied in the Welcome section.
Welcome!

__________________
Page 1 of 1  sorted by
 
Quick Reply

Please log in to post quick replies.



Create your own FREE Forum
Report Abuse
Powered by ActiveBoard