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What jets are you running it on and what carb?
Check the br9es spark plug for a spark
Check your plug aswell but most likely carb related
What carb is it pal?
is it sitting flush with the throttle cap?
isit 50 or 125 ?
Are you using typhoon, runner or nrg converted loom?
Yeh possibly
If you say its only running with choke on though it could be running lean :\
Just make sure your reed block, and inlet are tight and sealed properly and check for cracks or holes in manifold also check to make sure the...
check cdi and coyle aswell but does sound like a jetting problem or possible air leak :\
Hmm same how long have the garage got it for
Standard carb on it aswell?
Could be a crank bearing if you say its coming from variator side
Check the spark and what jets have you got in it
Hai
Just check your plug first mine did this about 2 week ago
Ive got a pm55 on my typhoon but i had to do abit of diy to the fan case lol
Try a new plug :)
Are you getting a spark?