Idle Question

kgb117

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2012 Pro RMK 4800km. Compression was 130 both sides last I checked about a month ago. I replaced pistons at 3800km. TPS reset when I did pistons.
The issue: when I start the sled from cold at the parking lot recently it started to idle at 2100-2200 rpm. It does this for a short amount of time and if I blip the throttle or just leave it for a min it'll return to happily purring at 1800rpm. When I ride, stop and start, no issues. When I get higher up say the cabin and go in for a while and the engine cools down and I start it up it idles at like 1600 rpm until I blip the throttle and it goes back to idling just fine at 1800 again. Throttle cable? Reeds? TPS? Fuel pump?
 

takethebounce

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Reeds do cause minor issues at low rpm/idle, if the ends are chipped or flaking its easy to determine. You could also check to ensure the throttle bodies are operating equally. There have been some that come out of balance and cause issues.
 
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