Motorised bike running bad

Mosakaraysa

New Member
Local time
12:47 PM
Joined
Jan 17, 2025
Messages
13
Location
Netherlands
Hello,
I recently purchased a motorised bike kit 80cc from ebay around 3 months ago and I've been running it normally and I have broken it in. Recently when I went on a long ride around 40km I noticed my bike was running weirdly so I checked carbeuator and it looked fine until I checked my sparkplug. It was the worst I've ever seen it was dripping with black oil, I use a 32:1 ratio the whole time I've had the bike and I have correctly adjusted my needle in the carbuator, the sparkplug was done so I went to the shops to buy a new ngk it was running fine until today. I noticed my bike was dripping a lot of oil from the exhaust and it was 4 stroking around 34kmh. I use a nt carbeuator. Anyone have any idea what could be causing it as my bike use to do more more than 34kmh. Thanks
 
Hello,
I recently purchased a motorised bike kit 80cc from ebay around 3 months ago and I've been running it normally and I have broken it in. Recently when I went on a long ride around 40km I noticed my bike was running weirdly so I checked carbeuator and it looked fine until I checked my sparkplug. It was the worst I've ever seen it was dripping with black oil, I use a 32:1 ratio the whole time I've had the bike and I have correctly adjusted my needle in the carbuator, the sparkplug was done so I went to the shops to buy a new ngk it was running fine until today. I noticed my bike was dripping a lot of oil from the exhaust and it was 4 stroking around 34kmh. I use a nt carbeuator. Anyone have any idea what could be causing it as my bike use to do more more than 34kmh. Thanks
Put a new ngk spark plug in it & it will be all good again.
 
Sounds like it's running rich and/or has excess fuel in the bottom end. Clean the plug off with a brass wire brush if you can and clean it a few times. If it doesn't clear up your carb is running way to rich. I would also suggest pulling off the float bowl and making sure the jet didn't vibrate loose. They tend to do that sometimes
 
Sounds like it's running rich and/or has excess fuel in the bottom end. Clean the plug off with a brass wire brush if you can and clean it a few times. If it doesn't clear up your carb is running way to rich. I would also suggest pulling off the float bowl and making sure the jet didn't vibrate loose. They tend to do that sometimes
Ok thanks I'll let you know how it goes
 
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