Last night i realized that I never dropped the sump pan on this bike to see what surprises await me in there. I did and nothing out of the ordinary; No metal or sealant globs. I cleaned out the bit of sludge that was at the very bottom and installed a new OEM gasket. I also picked off the small bits of sludge that made there way onto the oil pump pick up screen with my fingers.
Since I needed to pull the exhaust I also decided to through a new oil filter on. The o-rings with the K&N filter were too big to use so I opened an extra Honda filter I had used the o-rings from there. The exhaust also got new copper crush gaskets.
Oil Pan by
tradart101, on Flickr
Anyway, with all else unchanged. No touching electrical, carbs, correct oil with no leaks, no exhaust leaks, THE BIKE IS NOT RUNNING AS SMOOTH AS IT DID THE FIRST DAY OF STARTUP?
It kick starts first try still and holds idle, but the idle is hanging about with choke applied. Once it's warm and the choke is off the slight hang goes away. All 4 pipes are getting equally hot but there is a slight intermittent misfire I can hear at idle and the rev is not a smooth. It wants to get a bit choppy/blubbery mid throttle.
That said I only ran the bike bike for a few minutes after the work I did last night. Maybe I'll go for a longer ride and report back if it smooths out.
I don't want to mess with the carbs because they are tuned so nicely and evidence is in the start up video.
Help me brainstorm what would be causing this? Keeping note that all I worked on yesterday should not have changed the running performance of the bike. Coincidence or not?
Thanks.