A few weeks ago before winter set in it began stalling occasionally when going into corners but would start back up ok. My 27yr old son who rides it most noticed it was nice and steady at start-up/tickover and at WOT but would not hold a midrange throttle without misfiring and backfiring through the exhaust pipe.
I tried replacing a few items after reading posts and searching on the usual forums but each time I swopped something out the misfire remained. After a few hours working on it today I am getting to the end of my patience with the bike and would like your thoughts on my next attempt in a few days time when this other stuff turns up by post.
I have sent for a new header to silencer seal and clamp along with exhaust repacking materials after a friend came around and noted straight away that it was excessively noisy considering it sports a STD can. He reckons it might be an air leak in the exhaust somewhere that is causing it to stutter at mid throttle openings, could this be the cause?
So far in order of replacement/testing:-
Valve clearance checked (spot on)
Fresh fuel
Iridium spark plug x twice
Disconnect kill switch
Coil, plug cap/lead etc
Sent stator away for testing, resulted in rewind
ICM and harness swop
TPS tested as per manual (4.9K ohms) so tried it unplugged
Carb stripped (again) new main and pilot jets fitted (and AP squirt checked)
Carb connector boot checked for cracks/leaks
The engine is mechanically spot on and has only done a few hours since piston kit, clutch pack, steel inlets/recut seats, all valves checked and lapped in again (all steels now). Engine has been taken apart again since and everything checked again and all OK.
Have I missed something really obvious?
This episode has knocked my confidence a little as I am usually the 'friends dad who is good at fixing crossers'
All comments welcome and I have a thick skin so weigh in if I'm well off the mark with my efforts so far
Thanks guys
Ian
PS. I have 5 Hondas in the garage
