Thought I posted about an hour ago but think I never pushed submit.

Interested to know how sensitive the bikes are to tps sensor. I was testing mine with a digital meter, when opening the throttle very slowly, I'm getting a slight!y jittery reading close to full throttle on digital meter. I tried again using an old school analog meter...seems a bit smoother.

Something funny going on with my bike...when it gets warmed up it starts to go flat at 10.5k rpm at full throttle. Seems way lean. Think maybe I am not getting full ignition advance, but manual says if throttle is over 20%, the advance is 5.8 deg. The 3d maps aren't clear to me. Maybe I am over thinking this.

Checked to make sure bike isn't sucking in air someplace other than thru the carbs, but nothing obvious. I will need to pull carbs and pipes to do a proper pressure and vacuum check. I am at a point where bike is lean on top no matter how big I go on main jet. But works fine when cool, gets worse when hot. Bike ran like crap on track few weeks ago. Could not get it to run good above 10.5k

Thinking either seals are going or ignition timing getting wonky when bike is hot.
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MC28 SP

I would do a proper leakdown test to confirm you have no leaks. Did you do a plug chop to see what the plugs look like at that rpm?

Plugs are leeeaan white.

I would be worried if I saw white plugs. Do a leak down test for sure!!!

I found a cracked hose on the air solenoid way down where hose goes into the carbs. I replaced all the hoses with new. Haven't gone out riding, but suspect this is why both cylinders were running lean. Hoping it goes rich...then I will have to start working down to find optimum mains.

I am seriously thinking about abandoning the entire air solenoid system. I'm sure they serve some useful emissions purpose and make the bike more round town friendly. Suspect others will say they contribute to the bikes legendary performance.

Any commentary on there usefulness for a track bike.

😢😢😢. Fixed the cracked air solenoid hoses and rode today, right cylinder after a plug chop on side of road finally showing color and wet as a result of the giant mains......now for the bad news.

Last weekend pulled flywheel and found some oil, dried it all up.

When got back to house, pulled left plug, still white lean. Pulled flywheel again...fresh 2T oil. Bad crank seal time to pull the engine. Will probably send crankl off for new center seal, but need to pull engine apart to see what I'm working with.