I have Rush slip on's on my bike. The air being emitted from the right side exhaust (front cylinder) is warmer and stronger than the exhaust air being emitted from the left exhaust (rear cylinder). The right (front) slip on portion of the exhaust is much warmer to the touch than the left side (rear cylinder). I noticed in the left (rear) slipon a little wetness (black and oily) at the bottom rear of same. The bike seems to be running ok. Both spark plugs appear to have the same color with respect to firing. Neither plug is oily. The light for start up comes on before starting as usual then goes off after fuel pump is primed and then comes back on for a few seconds, goes off and doesn't come on again until the ignition is turned on again as usual.