XS650-Spark
Spark
Hi, I'm Looking for some ideas on why this could be happening...
Problem:
It runs great until I go down a long steep hill and then the bike begins to hesitate, then backfires and eventually dies. It doesn't matter if I'm on or off the throttle. Every time I find both spark plugs are fouled. I believe it is oil, but I'm not 100% on that. If I pop in two new plugs everything is dandy until I go down a long steep hill.
My BIke:
I've got a 1977 XS650 stock bike, except pamco which I installed and works like a charm.
Plugs: BP7ES NGK with gap to spec
Carbs: I've cleaned inside and out. Pilot screw 1.5 turns out.
Fuel: is flowing fine, filters clean and clear
Timing: checked when pamco installed
Valves: to spec
Battery: tests perfect and recharges fine
Compression: Left 144lbs / 170 with oil. Right 149 / 172 with oil
Any ideas or help would be much appreciated.
Problem:
It runs great until I go down a long steep hill and then the bike begins to hesitate, then backfires and eventually dies. It doesn't matter if I'm on or off the throttle. Every time I find both spark plugs are fouled. I believe it is oil, but I'm not 100% on that. If I pop in two new plugs everything is dandy until I go down a long steep hill.
My BIke:
I've got a 1977 XS650 stock bike, except pamco which I installed and works like a charm.
Plugs: BP7ES NGK with gap to spec
Carbs: I've cleaned inside and out. Pilot screw 1.5 turns out.
Fuel: is flowing fine, filters clean and clear
Timing: checked when pamco installed
Valves: to spec
Battery: tests perfect and recharges fine
Compression: Left 144lbs / 170 with oil. Right 149 / 172 with oil
Any ideas or help would be much appreciated.