Yes, I know I made a thread earlier with some issues, but thanks to a few weeks and a couple of hands, I've narrowed my problem down. I think. HELP!
2003 RC51 SP2. 9k miles. Will not hold idle unless I hold the throttle. Will run 'fine' when the throttle is held, dies when I let go (same as last thread, this didn't change) regardless of choke setting or engine temp.
New NKG Plugs (I bought 4 new ones and swapped them all around)
Does not smoke
Does not have oil burn,
No coolant in oil
Coolant is clean and has no leaks
PAIR mod, Flapper mod, Vacuum is good as far as I can tell
PC3 with map, symptoms happen whether attached or disconnected, no change in problems.
*A friend of mine said it sounded like '1.5' cylinders, or that something was 'off'
To check this, I pulled the plugs. I had both spark plugs out, attached to the coils, and cranked it over. I got blue spark from both plugs.
I put the front plug back in, by itself, cranked. It fired.
I pulled the front back out, and did the same with the rear installed on its own. It also fired.
Just to be extra sure, I grabbed a hold of each one and tested both leads with my hand. Took one for the team (twice) and blasted myself when it cranked over.
I'm 100% sure both leads are getting healthy spark.
Ran the bike for a bit, started it different times, let it heat up. etc. When the bike dies this is the result:
That is a mist of fuel by the way. Not coolant, not white smoke. I know it's hard to tell from the pic, but I assure you (almost inhaled enough today) it's atomized fuel.
Strange enough though, is the FRONT misty cylinder spark plug is a black color after running a bit (looks rich). But, the REAR spark plug is almost clean(!) but also a bit wet with fuel. BUT IT HAS SPARK. I watched for blue again, and blasted myself with the lead (a third time now
I yanked the FPR hose off to check again, it's dry. I'm about to order it anyway, as someone suggested in the last thread. But all tests so far don't point to the FPR. (If this ends up being it I'm gonna laugh with joy)
On top of all of this, and I think this is where I'm getting somewhere, but the exhaust temps are way way off. At running temp (200-210), the front header is burning to the touch (as expected). The rear one, however, I can almost grab with my hand, it's only sort of hot. Warm almost. Which brings me back to running on 'one' cylinder. Maybe. I don't get it.
Thoughts on this update?