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Old 07-01-2013, 07:17 AM   #7
Beastly Adventurer
Joined: Apr 2007
Location: Reno
Oddometer: 1,433
You said the previous owner raised the needles, richening the mixture. Warmer weather would make the bike run even richer. Needle position makes the biggest difference. I think I would drop the needles one clip (raise the clip) to lean it back out a little.

My 950 also needed choke and time with the choke on to warm up.

Once jetted properly these bikes shouldn't need rejetting. I rode mine from sea level to 12,000 feet in temps from 20 F to 100F and never felt the need to rejet. So I am always suspicious of a well used bike having to be rejetted, unless there has been a significant change in the air filter or exhaust system.

Is there any chance the previous owner switched from a paper air filter to a foam filter? That would have required a jetting change. You should also check that the carbs are properly seated on the intake manifolds. It is very easy to have an air leak there LEANING the mixture.

Good luck.
KTMs--300, 518, 990
renogeorge is offline   Reply With Quote