4th session, bike is running great and I'm pleased as punch.
Short straight between T2 and T3, bike is upright (not leaned over) 6th gear and I get a telltale hesitation. Oh no, this isn't good. I'll pit in and check this out.
Bend the bike over for T4,5,6 and the power is back. Hooray, but I still need to pit.
Bend over for T7,8,9,10,11 and all seems fine, but it can't be, there was a hesitation.
Through T12 and I fly a hand to indicate I'm pitting, bike isn't happy now severe loss of power. Round 13 and stick to the inside, pull the clutch handle and the bike dies. Oh no, not again.
Roll onto hotpit and coast to a stop, walk it the rest of the way in.
Check the oil in the sightglass, no water = head gasket is ok.
Check fuel = all good.
Check the crankcase pressure catchcan filter, look good.
Change the oil - dayyyem that's hot!!! Scalded my hand.
Oil looks good, lots of metal shavings on the magnetic plug = bad sign.
Check the radiator = hmmmm, not quite up to the top there. Where's the water?
and suddenly it hits me like a 2 ton heavy thing. Oh ****, did I not have enough water, maybe I didn't burp it enough, did it cavitate and run dry when upright? No no, that can't be it. Maybe the cam chain rivets failed, I just did them 2 days ago.
Pull off the waterpump cover and give it a kick, the impeller turns = cam chain is good.
Give it a kick, no compression.
Put it in gear and I can walk it around in gear with little resistance.
Wait, maybe one of the locking nuts on the valve adjusters came loose and that valve opened up.
Strip the body & tank, drop the radiators, pop off the valve covers = nope, all looks good.
Pull the plug, yes yes, pull the plug = electrode tip is missing, burned off, ceramic resistor is cracked. Where's the tip, somewhere inside the cylinder.
So, now you know what I know...