When I first assembled the bike I could ride down the driveway and release the clutch, throttle up and take off right away. Now I have to pedal for a good 500 yards while the engine chugs along but not really pulling me. Then it begins to kick in in short spurts until it is finally running full out. The engine is still in its break-in period but seems to be getting worse not better. Any thoughts?
Engine taking a long time to engage
- Thread starter peregrin
- Start date
Is the engine itself maintaining rpms?..explain "Chugs"......it may be the clutch slipping
http://motorbicycling.com/f39/motor-bicycle-clutch-301.html
http://motorbicycling.com/f39/motor-bicycle-clutch-301.html
Thanks for the advice guys. I just checked the sparkplug and it looks ok to me. Brownish in color, definitely not all black and oily. I'm a super newbie here so bear with me if I don't use the right terminology. The engine turns over really quick and then sounds like a slow idle - the rpms remain constant even as I throttle and then as I said it jerks to life in little spurts. I should note that the engine also does not idle at all unless I am moving. It shuts right down once I stop.
You haven't mentioned how the engine runs after it starts except for no idle. It's sounding more like you've developed an air leak somewhere in the intake area. Check your intake manifold gasket, carb to manifold, and crankcase gasket. The most common and easy way to check is to get the engine running and idleing the best you can which might require keeping it running with the throttle. Now spray some carb cleaner around those areas I mentioned. If you see a noticible difference in RPMs you've located the air leak. I would look closely at the intake manifold gasket and carb to intake area first; they're the most common places to leak.
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It sounds like the engine is 4-stroking.... (it's not a total problem yet) Wait until you get a couple of gallons through the engine before we start messing with the jet.
Make sure the carb slider is moving freely, & not sticking.
also, there is a idle screw on the side of the carb... turn it in until it stays running!
Make sure the carb slider is moving freely, & not sticking.
also, there is a idle screw on the side of the carb... turn it in until it stays running!
