I recently bought a 1997 RM250 used. The last owner mentioned that I might want to run it 50:1 to avoid all the oil coming out the exhaust, etc....
I bought the bike and after realizing that I am getting use to the bike (I hadn't riden in over 10 years) and it isn't running 100%. I also started to foul plugs every ride. I took it to my mechanic and he said I need a new top end. He takes it apart and says that the piston is scuffed from the exhaust valve sliding into the piston and hitting it. He said he would do the top end, grind down the valve a bit (He use to have a 97 RM250 as well and I guess this is common practice??) and clean it. After he put it back together he said it wasn't running as fast as it should (like I experienced earlier) and he needed more time with it. He calls back and said he got it to run pretty well by adjusting the Valve springs, but it still isn't 100% because I have a HUGE crease/dent in my header pipe (Bills pipe) just exiting the cylinder. I ride it for a few rides and agree, better but not 100%.
I send my pipe out to get fixed and decarbonized and reinstall it. now the bike sounds at better at idle, MUCH more poppy and fresh, only problem is, when I go past 1/2 throttle the bike jerks back and forth like it is misfiring (even though I know that is NOT the case). The ONLY change I made was fixing the pipe, I am still getting a TON of black oil coming out of the pipe/header. I have talked to a few mechanics at the local Suzuki shops and they didn't even know you could adjust the valves :coocoo: so they just recommended cleaning the assembly (my mechanic is out of town and I need this to be fixed in a week, arrghhh). I adjusted the valve springs to the stock settings (1/2 turn) and it seems to run better, but still seems to cut out in a alternating fashion (impede exhaust flow at greater than 1/2 throttle and under half throttle it sounds OK, but still runs slow) .
Any ideas on what to do at this point????
I have searched and gotten 1 result, but he never said what his fix was,
ANY HELP I would sure be greatful!!!!
I bought the bike and after realizing that I am getting use to the bike (I hadn't riden in over 10 years) and it isn't running 100%. I also started to foul plugs every ride. I took it to my mechanic and he said I need a new top end. He takes it apart and says that the piston is scuffed from the exhaust valve sliding into the piston and hitting it. He said he would do the top end, grind down the valve a bit (He use to have a 97 RM250 as well and I guess this is common practice??) and clean it. After he put it back together he said it wasn't running as fast as it should (like I experienced earlier) and he needed more time with it. He calls back and said he got it to run pretty well by adjusting the Valve springs, but it still isn't 100% because I have a HUGE crease/dent in my header pipe (Bills pipe) just exiting the cylinder. I ride it for a few rides and agree, better but not 100%.
I send my pipe out to get fixed and decarbonized and reinstall it. now the bike sounds at better at idle, MUCH more poppy and fresh, only problem is, when I go past 1/2 throttle the bike jerks back and forth like it is misfiring (even though I know that is NOT the case). The ONLY change I made was fixing the pipe, I am still getting a TON of black oil coming out of the pipe/header. I have talked to a few mechanics at the local Suzuki shops and they didn't even know you could adjust the valves :coocoo: so they just recommended cleaning the assembly (my mechanic is out of town and I need this to be fixed in a week, arrghhh). I adjusted the valve springs to the stock settings (1/2 turn) and it seems to run better, but still seems to cut out in a alternating fashion (impede exhaust flow at greater than 1/2 throttle and under half throttle it sounds OK, but still runs slow) .
Any ideas on what to do at this point????
I have searched and gotten 1 result, but he never said what his fix was,
ANY HELP I would sure be greatful!!!!