missing

[widefknopen12]

i have a 5b with 30.5 cc motor at high rpm its like it hits a rev limiter.i have replaced coil,spark plug,carb,carb spacer,re torque cyl head ,compression test 80 lbs ,ck for air leaks ,out of ideas any suggestions?thank you

 

[GLYNSAVAGE]

pulse port on the isolator block clear?

 

[widefknopen12]

yes replaced isolator block also.

 

[nyctankman]

How are the fuel lines? Check for holes in line inside & out of the tank.

 

[roadrashracing]

How many runs are on it, save your money and get a Zenoah, best choice I ever did. The km motor is good to get you going, but I don't think they last to long, mine was starting to show some wear after about 10- 12 tanks.

 

[Go fast]

Mine broke after 10-12 tanks , with no warning ran like a top till it quit.

 

[xraysrt6]

Go Fast quit frowning you know you wanted an excuse to get that bigger badder motor and it just fulfilled your wishes for you. By the way how is that GizMotor running?

 

[Go fast]

Its expensive cause you gotta keep replacing rear tires but you'l know now.