TM400Rider
Member
- Aug 18, 2003
- 7
- 0
Hi,I have a 1991 RM 250,and it spooges oil out the pipe and is loading up pretty bad from 1/2 to full throttle but runs good down low,I was told the stock main jet size was a 370,and the bike had a 340 in it when I took it apart so I put a 330 in it and it still runs really bad from 1/2 to full throttle unless I really hang in it and blow it out,I also have the needle clip on the leanest setting. I called around and most people said that a 370 sounded to rich and I got looking around and almost all 250's except a 01 CR is running like a 160-180 range jet.I have a 183 jet do you think it would be safe to make that jump? My bike is bone stock,and the carb is a mikuni tm or tmx but I think it is a tm.Also I run my premix at 32:1.Any help would be greatly appreciated as I would like to have it going reliably by tomorrow.Thanks