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1978 Rm 125
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Posted by: RM Dave---------------------
My RM 125 is doing my head in?? The bike will idle and rev nice but as soon as you take of in gear it dies. Any ideas??
Posted by: whenfoxforks-ruled---------------------
More information? 78 or 78 1/2? Good compression? Can you bump start it and ride it? Is the clutch working properly? Its not running backwards?
Posted by: Uchytil---------------------
Sounds like the clutch.
Posted by: RM Dave---------------------
Ok, New coil, top end, cables, carbie etc ??? Starts and will go into gear !!! you can ride the bike slowly but as soon as give it full throtle it dies??? Clutch seems ok I do have spares witch I can fit. Could it be flooding it see ???
Posted by: whenfoxforks-ruled---------------------
Thats next. Pull the plug after it dies, dry or wet?
Posted by: _JOE_---------------------
Sounds like a fuel supply issue. Like Foxforks said, pull the plug and see if it's wet or dry. Did you set the float height and make sure the in-tank strainer and any in line fuel filters were cleaned/replaced? New carb? Same as OE? What jetting?
Posted by: zoommx---------------------
My first guess based on the symptoms would be a plugged main jet. The other ideas presented are quite possible also. The fuel flow from the tank would be the easiest to test, remove the fuel line and open the valve (avoiding any ignition source). If that wasn't the problem, if my bike, the carburator would be off for a thourogh inspection/cleaning. Don't forget to inspect the passage the fuel flows from the fuel line through the float needle and seat for blockage also.
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