I've got about 600 miles on my 836 F2 engine at this point. For say the first 300 miles my timing was pretty badly off, down around TDC. I finally had time to check it and advance it up to the stock 10* at idle. It has WAY better power, idles, and runs so much smoother now. However ever since I got it in time, the thing is running HOT. Most of this riding has been in upper 60s to lower 80s weather.
If I sit in traffic I can feel the heat radiating onto my leg through the side cover(from the oil tank). In light around town riding(say consistent 30mph stuff) I can feel a good bit of heat radiating off the engine. The exhaust pipes have discolored a tiny bit from one or two of those reallll hot times. Though they were already discolored from some issues a few months back on the stock bore motor. On highway runs for extended times the engine doesn't seem to get too very hot. Hard to tell riding it of course.
I just pulled plugs and found them to all be a nice milk chocolate color. If anything a tiny bit lean on one side of the plug, but no bright white scary stuff. Riding it I feel a slight bog/ flat spot in the mid range, so I am going to shim up my needles a position to try and clear that up.
Bike info:
77 F2 836cc engine
Running 89 octane
Dyna-S Ignition with Stock coils and NGK caps
Stock NGK D8 plugs at factory gap
Factory 4-1 to a Mac Muffler
Emgo Pod filters(oh no evil)
135 Main Jets
Stock needle position
Stock 40 slow jets(I believe stock is 40)
Factory Super Sport "Oil Cooler"
I plan to install a real oil cooler setup, the new radiator for it is on the way already. Just need the adapter and plumbing parts now. I am going to do an oil change with Non-Detergent SAE30 when I swap to the new oil cooler setup.
I truly doubt shimming my needles is going to get this to go away. I am doing that for the flat spot in upper RPM ranges.
The bike runs great otherwise. When it gets super hot it starts to run like total dog crap and the oil pressure gets scary low at idle(according to the cheapy gauge anyway).
Anyone have some input here? I live in Texas now and it isn't even upper 90s yet. So when the weather really gets hot I'm worried I will burn this thing up quick.
