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Recently I purchased a Templar 250 Pro. Ran great but had rapid backfire on deceration, and the exhaustpipe was blue. Carb was unservicable, so I inquired to X-Pro and they sent me a new one. Did the same thing. Stock jets were 110/30, changed to 120/40 and it was way better,accept the idle had to be over 2k. Ordered a Kehin 30 and jetted 140/50 and no deceleration backfire. I do have an intermittent light popping in the exhaust at idle (1500 rpm) with no performance issues. I still can't figure out why when cold there is a idle increase for a bit.
I am riding at 4000 feet elevation, so....
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