929 backfire through throttle body
Just swapped motors on a CBR929.
Motor I got from E-bay and the bike I picked up as wrecked.
It was orginally going to be a parts bike for my track bike but
when I got it home I realized I had everything in my garage to get it going.
Anyway....Put it all together and it starts fine, then it when it
starts to reach operating temperature it backfires through the throttle body
and almost stalls. It is the second cylinder in from the right side of the bike. I have the airbox off and I can feel hot gas being pushed out of the throttle body.
I think it might be the plug that is only occasionally firing..
I used the best looking plugs out of the two motors but not new ones.
Will get new plugs tonight. If it is not that, any ideas....
Any help would be greatly appreciated.