rm 125 wont stay running

[steveo1902]

i just bought this bike the other day... Got it home and started spring tune up since hasnt been ran since last fall. Changed air filter plug oil. Somthing was fishy bout the oil. It looked kinda like some thick grey paint. Not really sure what it was so i emailed the guy. still waiting for a response.. So anyway flushed that nasty stuff out and put in suzuki oil 10-40. Now it seems like the plug keeps fouling out... rode this morning for 5 min and it like popped and then died. changed plug and rode fine... for like 15 min... so my question is... Is the oil to think and im getting blow by or rings bad? btw i run 32:1.

 

[nikki]

What plug are you running, BR9ES? Might be too simple, but maybe try a hotter plug like BR8ES, and give that a try.