If your spark plug has carbon build up check your carburetor, it might be failing. Excessive fuel entering the combustion chamber might be the cause. Thanks for watching!!!
Well, there's likely your problem right there: a Chinese Torch brand sparkplug. They are notoriously craptastic. If you've got some Chinese-made motorized equipment like a generator or whathaveyou, the quickest and best way to improve its running is to yank out whatever Torch, Bongodongo, or whatever other Chinese plug is in there, look up its equivalent Champion, NGK or Autolite equivalent, mount it, and then punt that original plug into the hedges or use it as a fishing weight. For a Torch F7RTC an NGK BPR7ES, Autolite 63 or a Champion RN7Y, RN7YC or RN7YCC should work just fine.
Adjust the carburetor clutch and clean the muffler bearing and then put in a Champion or NGK spark plug . Definitely don't forget to gap the giggling pin and will help for the timing 👍
Got a 1987 TRX250X, Psi of 125, manual says 170-190 needed, spark plug looked like in video too, tried both Keihin carb and cheap chinese carb and getting similar results, rebuild and cleaned Kiehin carb but no changes, think its my rings?
If the manual calls for at least 170 psi then either the piston rings are worn or the cylinder is scored and compression is lost. Also, check the valves and make sure the clearance is within specs.
I bought a bike that has been sitting for 10 years and when I got it the oil was all black as well as the spark plug all black and full of soot just like the one in the video. What do I need to do before replacing the spark plug with a new one? Should I clean the inside where it sits or spray it with something first? I've changed the oil and gas and cleaned the carb. The bike ran very bad before and died when reaching 4:th gear after some time and when riding it for a while. So I have it taken apart now since I will be replacing the petcock since it was leaking.
Try some seafoam to clean the engine. The carb might need to be replace though. After sitting for 10 years the gas in the carb most likely did some damage to it.
My bike starts instantly the first time but when I switch off the bike and attempt to start again it only starts if I give it a bit of throttle. Could this be a spark plug problem?
My spark plug getting black in just 2 minute after bike satrt i open carburetor fully clean and set milage but problem not solve. Filter sponge also clean . Is not proper tuning??
@@10minutefix the fault is after overnight morning bike start in 1st self and enough idle speed but after 1km engine gets slow and off in idle and sometime won't start easily. Finally when I open spark plugs I see it's black I check again spark plug because it should be white if everything is Ok after all cleaning when I insert spark plugs it's getting dark carbon
@@10minutefixHi Thanks for quick reply🙏 I got fault it's due to Piece of rubber o-ring got stuck inside carburetor air mixer screw due to which air flow stucks, lots of carbon on spark plugs and too much fuel consumption.
Well I can honestly say it can be many things but spray some carb fluid in the carb. If it starts then it’s a fuel related issue. Fuel is bad, fuel line leak, carb is not working properly, fuel tank has a vacuum and others. I have several videos on diagnosing it.
This spark plug does not have oil burning. It is fuel that is not burning properly. If it were oil then it would look like soot. Also, if oil were burning then you really have a problem with the engine or there is excessive oil in your engine.
@@10minutefix I know it does not burn the oil, but it did have a bit much I darined it off. Still a bit black plugs though. The bike rolls good, but if you leave it iddle for long it does cover with black. Well mechanic with it
@@10minutefix Well, I dont think it is. Theyr brand new. Ima take it to the mechanic anyway. But its annoying. Its a Honda CM 125 cafe racer that got a new 150cc cylinders and pistons like a year a ago. Thanks for your support bro.
I mean that if you have gas that has been sitting for many months, has water in it, or has other contaminants. Gas will break down and will not burn properly and can cause damage to engine.
