900RR Hesitates & Miss Fires
Hi ya, My bike stumble/hesitates around 4500-5000 RMP
It seems to come & go at random.
Some back round: The bike is a 96 CBR900RR w/ some mods and is well taken care of. About year + ago I throw the chain. I was in the middle of building up one of my cars at the time and didn't have time to work on it so the bike sat. Maybe two mouths ago I got to work on it. Because it sat for so long, I pulled the carbs, cleaned and went over them, flushed the tank & valve, replaced the fuel filter, spark plugs, charged the batt., oil change, all the small stuff. I dropped a little 2 stroke oil down each plug hole and turned the engine over slowly by hand a little bit....Nice and smooth.
At 1st it didn't want to start, understandable considering. After it started it seemed to have a cylinder down. I pulled the carbs again to make sure I didn't miss anything, looks good. Checked the spark at the ends of the plug wires, looks good. Put it all back again & she came to life. The hotter it got the smoother.....nothing odd there.
Well now and again it seems to miss fire & stumble around 4000-5000 RPM and it just happens randomly. The batt. is kinda iffy & doesn't hold much of a charge. (I have a new one on the way)
Any thoughts? What's the odds that maybe one of the new Honda/NGK plugs are a little funky?
Any input would be great.