I just finished building my first motorized bicycle and am having a great time with it. I'm using a Limited Edition 49cc motor from Powerking. Great stuff!
Anywho, I noticed the engine tends to "cough" at low speeds, wherin it basically snags and I feel the jerk. This dissappears as I open up the throttle. Now I was replacing the cheapo Chinese spark plug with a better one today, and I noticed that the spark contacts were black. I've been reading the forums a bit, and apparently, that's not right.
So I think I might be having a fuel mixture issue, which would also explain why the engine is "coughing" at low throttle. However, I'm also using a 16:1 oil fuel ratio (that's what the manufacturer reccomends for early break-in), so I was thinking mabye that was the problem.
So I put the question out to the experts here: Is the coughing normal, or is there something I should be doing to smooth it out? It isn't really that bad, and it lessens as the engine warms up, but if I could reduce it that would be cool.
Anywho, I noticed the engine tends to "cough" at low speeds, wherin it basically snags and I feel the jerk. This dissappears as I open up the throttle. Now I was replacing the cheapo Chinese spark plug with a better one today, and I noticed that the spark contacts were black. I've been reading the forums a bit, and apparently, that's not right.
So I think I might be having a fuel mixture issue, which would also explain why the engine is "coughing" at low throttle. However, I'm also using a 16:1 oil fuel ratio (that's what the manufacturer reccomends for early break-in), so I was thinking mabye that was the problem.
So I put the question out to the experts here: Is the coughing normal, or is there something I should be doing to smooth it out? It isn't really that bad, and it lessens as the engine warms up, but if I could reduce it that would be cool.