Join Date: Jun 2011
Location: Ashburton, New Zealand
I had a similar thing, I'd close the throttle, engine braking would kick in but then I'd have little surge for a second or two and then back to engine braking. Turned out he air filter needed changing (it had done 17,500km). I changed it and no more surge.
Not being hampered by any great knowledge on the subject my reasoning goes something like this:
I close the throttle, the engine slows down, the semi clogged air filter lets less air through than it should resulting in a richer mixture, the gremlin box says 'shiver me timbers we're polluting the atmosphere' and opens the throttle a little then everything settles back down to where it should be.
But thats just my theory..
It may be that your sole purpose in life is simply to serve as a warning to others.
When I was a boy my parents said 'you are NOT having a motorcycle'. So I had lots.