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Dirt Bike Brands - Other
KTM erratic at high rpm
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[QUOTE="steve banks, post: 106250, member: 23698"] I have a 99 KTM125exc which has been running well for a while after sorting out some jetting problems but it's now running erratic at higher rpms. I stripped the carb and and checked it for dirt but it was clean. The air filter was also clean as I had only used the bike (briefly) twice since cleaning it. However, my airbox had a pool of oil lying in the bottom. I thought I may have over oiled the filter but I used silkolene air filter oil which is blue and extremely tacky, the oil in the airbox looked like transmission oil! The bike starts first time and runs good at 1/4 to 1/2 throttle but is spluttery at 1/2 to full. It feels like the main jet is too rich but the jetting was fine a few weeks ago and the temperatures or riding conditions haven't changed. I haven't tried changing the main jet as I was concerned at the amount of oil collecting in the airbox and thought the problem could be mechanical rather than a jetting one. Does anyone know what the problem could be? [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
KTM erratic at high rpm
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