Four Stroking

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Kurt Franz
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Four Stroking

Post by Kurt Franz »

Been riding my KDX on the road quite a bit lately and it rides rough at speeds of about 30mph and less. This "roughness" is kind of hard to explain, it is as if it just wants to run smoothl, but just can't quite make it. Does not matter which gear I am in. It is as if there is a very fine line between the bike running rough and smooth. Once above this "transition" point it runs smooth and strong. Someone mentioned a concept called "four stroking" that might be the cause.

Anyone else have this issue? Is it something with the jetting, or is it a natural to the bike

thx
1987 BMW K75
1973 Yamaha CT3
2004 Kawasaki KDX200
1981 Yamaha PW50
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scheckaet
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Post by scheckaet »

I would suspect jetting. What's your elevation, type of engine mods and jets? Plug look good?
Kurt Franz
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Joined: 04:45 pm Aug 20 2007
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Location: Northeast Ohio

Post by Kurt Franz »

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scheckaet wrote:I would suspect jetting. What's your elevation, type of engine mods and jets? Plug look good?
500-1000 above sea level
no mods all stock
32-1
1987 BMW K75
1973 Yamaha CT3
2004 Kawasaki KDX200
1981 Yamaha PW50
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