Re: Frustrating problem (rough running)
Electrical connectors are good. a year or so ago; I cleaned, checked, & projected every connector on the bike (bored, figured it was something worthwhile) .
Fan comes on just as it should and blows a lot of air. I even swapped out the fan motor at one point to be sure (measured the same CFM)
Right -- the main problem (stumbling/missing/whatever) only happens when the bike is hot, and reduces in severity as it cools down (ie: in traffic, it can be almost unrideable, but as traffic clears up, it cools down, and runs better). When bike is cold, it runs perfect. Sometimes when bike warms up, it runs perfectly. The only electrical things (other than actual wiring harness) that haven't been replaced is fuel injectors, stator & ECU. (Coils & plugs just showed up today, so I'll swap those out). Although, fuel injectors were professionally cleaned & flow-checked/matched.
As for the temp surge - it's really weird -- jumping from "normal" to 111+(celcius) very quickly, then back down (cycles a few times) is very odd.
While I'm in there doing the coils, I'll pull the thermostat out & test it. Since it's intermittent, I expect the thermostat to test OK. Now that I'm stuck in traffic again, I would like to put a colder thermostat in; but have no idea what will fit.
I may drill a couple of holes in it to keep water flowing, or just gut it and order a new one anyway.
I'm really hopeful it's not the waterpump. Being a metal impeller, I would expect it either to work or not...
Coolant is very thoroughly bled & is full, with no coolant loss for the past 8 months... (when it was last changed)
Thanks for the ideas. I'll let you know in a few days how it goes with the new coils&plugs & whatever I do to the thermostat.
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