How you all going? I was wondering if any one could help me? I was riding my bike the other day and it was perfect, then went home and put it away. Next day came and I went to start it, and now it backfires out of the left exhaust and turns off. I have checked the leads and changed the spark plugs, done a compression test and its still the same. I was wondering if any body could help me? Thanks.
Steve

1st do you cut the fuel over night.
can be fuel leeking into the piston.
Check the Carb for grit. clean it out. then leave the fuel off over night and see if that helps.

Have you sorted it yet Steve?
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MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball

still no fixed all the fuel systems been cleaned and the darn thing still poping next going to check the computer and magneto

...wracking brain...

Have you checked the exhaust is correctly fitted and sealed? Distant memory suggests that if air is being sucked in the exhaust will pop and bang. Might be the 2 stroke fumes hallucinations mind...
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MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball

how u all going today i got told that it could be the center main bearing on the crank shaft does any one thing that could be true how could that make the exhaust pop

I wouldn't know as I've never suffered that, but you can check for failure by doing a leakdown test.
_________________
MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball