1 Any suggestions chaps Sat Jun 21, 2014 4:04 pm
JGT
Platinum member
1988 K100RT, 92,000 miles. Good starter hot or cold but below 2000 rpm, any throttle position, the engine stutters as if on 3 1/2 cylinders. Once 2000 rpm is passed, it clears and runs very well and remarkably smooth with minimal vibration at 70 mph. Suspected an air leak so dismantled the fuel injection side but found all rubbers in good order including manifold bodies. All replaced with new 'O' rings for the injectors. Throttle butterfly's and air screw synchronized, no difference detected. Checked the resistance readings for the plug leads, caps and coils but all to speck. All four, new, plugs light grey in colour. Have moved the TPS switch so does not affect low speed running. Engine does not back fire on the over run. It has a new fuel pump and filter. Am running out of ideas. What would you suggest? John
__________________________________________________
1992 K75