| Thanks for the warning Frank. In the end I didn't leave the tank vented overnight, just opened and closed it to make sure there was no build up of pressure.
Anyway, I think I've got this figured out.
There appears to be exhaust gases escaping from the exhaust manifold (that's what you call the bit where the exhaust joins with the rest of the engine right?). The noise kept getting worse, so I had a good close look this afternoon. Before everything got to hot, I could put my hand around the manifold and feel gases escaping from there.
This would explain:
a) The noise
b) The loss in power
c) The constant popping on overrun as air got in
So my next question is:
- What do you think has happened? I'm hoping someone knowledgeable will say that it's most likely just a seal blown.
- Will I damage anything if I keep riding like this? Service due in a couple of weeks, I can put up with the noise that long, but am I likely to do any lasting damage to the engine?
Cheers
Phill |