bike loseing revs

today when i was riding my boke i kept loseing revs and sometimes rhe revs get stuck at full speed and didnt stop un till i turned the bike on and off 5 times any advice would be great?


thanks danny

 

I would be taking the tranny case off and giving the transmission components a look over as my 1st port of call

also when was the spark plug last changed?

 

thanks and the spark plug was changed at the start of summer

 

try a new plug then as a matter of elimination...

 

will do thanks for the help

 

a friend at work said that it might be dirty pertol would that do it because i think i put 2strok in oops :lol:

 

Highly unlikly to be old petrol.. Ive ran petrol thats been sitting in a shed for over a year in a jerry can, without problems.

When you say loosing revs do you mean bogging down? If its getting stuck on full throttle then your throttle is sticking.

 

yea but its allso reving by its self like i can do a no hander and it will go at about 5-10 mph by its self but when it gets into dop gear its fine

i am puzzeld

 

if it revs by itself...more than likely an air leak.

 

if it revs by itself...more than likely an air leak.[/quote]

fuck how would i go about fixig this

 

it not old petrol but its 2stroke mixed petrol and my bike is straight petrol

 

fuck how would i go about fixig this[/quote]

you would fix it by finding out where the air leak is, and putting it right

i.e a cracked/split inlet manifold, loose fitting carb, vac line off or split etc etc etc

 

thanks caprie dave

 

you would fix it by finding out where the air leak is, and putting it right

i.e a cracked/split inlet manifold, loose fitting carb, vac line off or split etc etc etc[/quote]

Here's a diagnostic trick I learned working on aircraft: Get a can of WD-40 + attach the red plastic wand. Spray it on, and around, each part of your intake system. When your engine's idle speed suddenly changes, you've found the area where your leak is located. Gabe