Some of the California GL1100s had exhaust restrictions, a washer welded in the header a couple inches down from the exhaust port end. These bikes wouldn't go over 75mph. I don't think they put restrictions in the 1200s but can't say for sure. A little more information would be helpful to determine what's wrong.I have a 1984 gl1200a that will not go over 70 miles per hour it is stuck at 4000 rpm at full throtle. I dont understand because when parked the bike can rev way past 4000 rpm. can any one help????
Hector, see if it will go over 4000 RPM in 4th gear? If so, you have either a fuel flow problem like a failing fuel pump or a plugging fuel filter, or a restriction at the tank petcock, or plugging screens in the carb inlet needles.. OR, you could have dragging brakes (jack the bike up & check that).. OR, you have an air flow problem to the carbs (look for a plugged air cleaner).. OR, you have misadjusted throttle cables not allowing full carb opening (twist the throttle wide open with the engine off & look to see that the carbs are opening all the way).I have a 1984 gl1200a that will not go over 70 miles per hour it is stuck at 4000 rpm at full throttle. I dont understand because when parked the bike can rev way past 4000 rpm. can any one help????
Hector, it takes VERY LITTLE fuel or throttle opening to free rev to 6500 RPMS. In fact it will do that on the idle circuits.I can get the bike to go up to 6500 rpm just fine reving it up in the drive way before the red lite bar starts coming on. I just don't get it.