Hi guys,
Im from the Philippines and I have a 1997 Kawasaki Vulcan VN400 (400cc Vtwin), and the rear plug keeps fouling, the plug looks black im not sure if its oil or gas but definitely the plug is wet. im actually thinking that its oil that havent burnt out or the plug is not cleaning it self enough, im using CR7E on both cyclinder. also if the piston oil ring is worn out, there should be a white smoke coming from the pipe right? but there is no smoke.
we have cleaned the carb already and adjusted the float valve and Jettings but its quite amusing coz the front plug has a brownish burn (which is right) but the rear is black and looks oily.
what could be the possible cause of this? coz it keeps killing my rear plug. im also using diesel oil because of the viscosity level. since im living on a tropical country i was advice by some harley owners that its better to use diesel oil because its more resistant to heat, is that true?
I also tried to switch the ignition coil it will run fine for quite sometime, but after a few kilometers (60kilometers) the rear plug will start to be fouled again.
i need your advice
PS. ive checked the users manual it only stated the issue with over heating and or cold plug, it doest state anything about oil foul plugs.
heres the photo of my vulcan, havent got a chance to take the picture of the plugs coz im here right now working on cruiseship as photographer, and i left my bike to friend thats fixing it.
Thank you guys in advance for the help and info.
Im from the Philippines and I have a 1997 Kawasaki Vulcan VN400 (400cc Vtwin), and the rear plug keeps fouling, the plug looks black im not sure if its oil or gas but definitely the plug is wet. im actually thinking that its oil that havent burnt out or the plug is not cleaning it self enough, im using CR7E on both cyclinder. also if the piston oil ring is worn out, there should be a white smoke coming from the pipe right? but there is no smoke.
we have cleaned the carb already and adjusted the float valve and Jettings but its quite amusing coz the front plug has a brownish burn (which is right) but the rear is black and looks oily.
what could be the possible cause of this? coz it keeps killing my rear plug. im also using diesel oil because of the viscosity level. since im living on a tropical country i was advice by some harley owners that its better to use diesel oil because its more resistant to heat, is that true?
I also tried to switch the ignition coil it will run fine for quite sometime, but after a few kilometers (60kilometers) the rear plug will start to be fouled again.
i need your advice
PS. ive checked the users manual it only stated the issue with over heating and or cold plug, it doest state anything about oil foul plugs.
heres the photo of my vulcan, havent got a chance to take the picture of the plugs coz im here right now working on cruiseship as photographer, and i left my bike to friend thats fixing it.
Thank you guys in advance for the help and info.