1 Hesitation and/or surge Thu Apr 25, 2013 11:38 pm
t1slc
active member
I just bought a 1991 k100rs. The bike is having some hesitation (or surging) issue. It seems to happen in all gears. It's as if the engine is loosing a bit of power, then kicks back in. The duration of the hesitation then surge varies from feeling like being buffeted by the wind, to more like hitting the brakes, or running out of gas.
I just replaced the spark plugs, which seemed to help a bit. The old plugs did not have the ferrules on the end, and I don't think they were the right kind. The threaded exposed end appeared corroded and the inside of the cable connector also looked like there was a bit of corrosion and 'gunk'. I have not replaced the cables. I will post photos of the old plugs.
There also sounds like there is a puttering sound that you can hear at idle. Potentially an air leak or vacuum leak? I can post a video with sound later too.
I'm new to motorcycles so I'm not sure what is normal as far as sounds, but I'm pretty sure the hesitation is not normal.
I just replaced the spark plugs, which seemed to help a bit. The old plugs did not have the ferrules on the end, and I don't think they were the right kind. The threaded exposed end appeared corroded and the inside of the cable connector also looked like there was a bit of corrosion and 'gunk'. I have not replaced the cables. I will post photos of the old plugs.
There also sounds like there is a puttering sound that you can hear at idle. Potentially an air leak or vacuum leak? I can post a video with sound later too.
I'm new to motorcycles so I'm not sure what is normal as far as sounds, but I'm pretty sure the hesitation is not normal.