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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
deceleration knock with 2 strokes
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[QUOTE="Pushin50, post: 1232704, member: 74325"] I picked up a new 08 XCW. It has the deceleration knock or ping. The dealer had fueled the bike with regular gas so for the first couple heat cycles the ping was pronounced. I then mixed some premium and that reduced the intensity on the ping. I am now running 110 race gas and the ping has mellowed but it is still there. I dialed down the idle to almost nothing but that had no effect. The ping happens at idle as well as on deceleration. Watching the exhaust as the ping happens it seems obvious that the cause is fuel burn in the pipe. Exhaust gasses are jetted out the pipe when the pinging occurs. On the KTMtalk site others have had the same problem (if it is even a problem). I have not owned a 2t since the Seventies. I am clueless as to a solution for this problem (if it is even a problem). You guys seem to know allot about this stuff so any help will be appreciated. thanks Pushin 50 [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
deceleration knock with 2 strokes
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