2000 rm 125 wont start after rebuild

[scotty2280]

i just put a new top end on my 2000 rm 125 and it wont kick start. i pulled it behind the four wheeler and it starts and runs great but wont idle. i havent had a compression tester on it. any ideas on what to look for? thanks in advance

 

[whenfoxforks-ruled]

Clean the carb, check the timing, and reeds. Have you ever replaced the float valve?

 

[scotty2280]

the float in the carb? it ran just fine before i did it.

 

[_JOE_]

Is the piston in backwards?

 

[scotty2280]

nope arrow out

 

[whenfoxforks-ruled]

Any dirt bike more than a year old , and has screwy jetting issues, replace the float valve. When would you think a leaky bottom end would effect more, idle or top end? The right seal and/or base gasket could be suspect. Where is your choke knob adjusted to? Where is your air screw adjusted to? That gem has a solenoid and power jet also. But, it idled fine before? Pull started by a quad smells like a flooded engine. Does it feel like it has compression?

 

[railer]

I'm about to rebuild my 98 RM125 motor. Hope I don't have the same problem. Please keep us updated as to the problem (once you figure it out, that is).

Brian.

 

[scotty2280]

i bent my ring when i put it back together, only came up to 30 psi, new ring and 195 psi and good to go..

 

[rmc_olderthandirt]

You bent the ring? I have broken rings but never bent one. How did you manage that?