OK this can't be good. Bike was not starting, so I took off the air filter, spayed some quick start in, put the air filter back amd swung the engine. Bike would fire every couple of turns, but I could feel it kinda kicking back into the air filter!!! Any ideas ???
Checked your valve clearances? If you think you can feel 'air' being kicked back into the airbox then it sounds like the intake valves aren't closing properly.
same thing as me but it was to do with the build up of fuel and when you off then on the kill switch BIG flame out the back was loud..... wont do that again fried the **** out of my filter
