Losing lots of power... LOTS!

[bbwlover]

Hi everyone

This has happened twice now. Once last week and once again a  few days ago. I'll be riding and all of a sudden the engine starts to spit and cough and lose power. I tried to push my way through it which only got me a few meters more. Once I gave up and turned off the bike, it was extremely hot and smelling of burn. I waited a while and tried again which at least enabled me to get home. That was the first time. I turned on the bike every now and then to see if it was still messed up. Nothing so I went riding, but again, it happened. The only thing that was common about those days was that it was in heavy rainfall. Any ideas?

[CROSSBOLT]

Lotsa ideas. Some apply to air cooled, some to liquid cooled, some to 4 cycle.......I think you have the idea by now!

Karl

PS: May be carburetor ice regardless.

[JJJoseph]

all of a sudden the engine starts to spit and cough and lose power

Always start with the O-rings between the intake manifold and the head (there's 2 of them).  If they're old, more than 2 years, say, they go flat and leak air and your motor will stumble and cough, and also won't move off idle.  New O-rings, about 25 cents each from the O-ring store or about $3 each from Kymco.