Misfire

motomartin11 · 23-09-2022, 08:39 PM

96MY 750 carb. About 3 weeks ago my bike started to misfire. I replaced the plugs and plug caps (cutting back the HT leads) having noted the plugs were black and sooty. This cured things until yesterday. The bike had been running well until this time when the misfire returned while out on a local ride. I managed to limp the 10 miles back home and whipped out the plugs which were mainly white in colour with a small chocolate brown stripe down a part of each insulator. The battery was showing 12.4 volts across the terminals without the engine running. One other thing which may or may not be connected : the oil appears to becoming emulsified at the sight glass window - this doesn't usually occur until the colder weather. The bike is rarely used for short stop start journeys .Any clues where i should start looking for the cause please? Thanks in anticipation.

23-09-2022, 08:39 PM	#1
motomartin11 Registered User Join Date: Sep 2010 Location: stourbridge Bike: M750 Posts: 371	Misfire 96MY 750 carb. About 3 weeks ago my bike started to misfire. I replaced the plugs and plug caps (cutting back the HT leads) having noted the plugs were black and sooty. This cured things until yesterday. The bike had been running well until this time when the misfire returned while out on a local ride. I managed to limp the 10 miles back home and whipped out the plugs which were mainly white in colour with a small chocolate brown stripe down a part of each insulator. The battery was showing 12.4 volts across the terminals without the engine running. One other thing which may or may not be connected : the oil appears to becoming emulsified at the sight glass window - this doesn't usually occur until the colder weather. The bike is rarely used for short stop start journeys .Any clues where i should start looking for the cause please? Thanks in anticipation.