I recently purchased and installed a 4g kit from bicycle-engines on my 1992 Spectra bicycle. I ran it 40 miles today without any show-stopping issues and changed the oil (it was filled with metal shavings... I'm guessing from break in). Overall, I'm really impressed with the performance of this engine. The only downside is the weight and width of the entire 4G setup. I have a few questions however.
1. There are two wires coming from the engine that end in a plug. Do these connect with the two wires leading to the kill switch in the throttle grip? If so, does the order matter?
2. The engine runs really well with minimal vibrations with throttle but the idle is fairly erratic. The engine speed changes by a couple hundred rpm every second at idle. I made sure that the engine is getting a good flow of gas and that the choke was off. Should I make sure that the spark plug is gapped properly (I never checked)? Is it worth setting the A/F ratio?
3. I can't get the rear sprocket to stay centered after riding the bike for a few miles. It will stay true side to side but not vertically (on the y axis). I was thinking about getting it trued and then applying a couple of drops of JB weld. Is this a good idea? I'm also running a 44 tooth sprocket and it doesn't seem to have any issues with any of the hills in my area. Do you think it's worth going with an even smaller sprocket? (Before break-in the engine's max crusing speed seems to be around 27 mph).
4. Are half links usable at all to get the drive chain length correct without using a tensioner? I tried before on my 2 stroke but the chain kept popping off the rear sprocket.
Thanks
1. There are two wires coming from the engine that end in a plug. Do these connect with the two wires leading to the kill switch in the throttle grip? If so, does the order matter?
2. The engine runs really well with minimal vibrations with throttle but the idle is fairly erratic. The engine speed changes by a couple hundred rpm every second at idle. I made sure that the engine is getting a good flow of gas and that the choke was off. Should I make sure that the spark plug is gapped properly (I never checked)? Is it worth setting the A/F ratio?
3. I can't get the rear sprocket to stay centered after riding the bike for a few miles. It will stay true side to side but not vertically (on the y axis). I was thinking about getting it trued and then applying a couple of drops of JB weld. Is this a good idea? I'm also running a 44 tooth sprocket and it doesn't seem to have any issues with any of the hills in my area. Do you think it's worth going with an even smaller sprocket? (Before break-in the engine's max crusing speed seems to be around 27 mph).
4. Are half links usable at all to get the drive chain length correct without using a tensioner? I tried before on my 2 stroke but the chain kept popping off the rear sprocket.
Thanks