some weird stuff going on

Mike Hunt · #1 07-01-2009, 10:03 PM

so i recently installed a 49cc kit on my bike, it runs, with a bit of persuasion. however theres a couple things ive noticed that make me wonder:

1) if im rolling along and i disengage the clutch the motor idles nicely, just needs a slight rev every five seconds or so so it doesn't stall, but as soon as i stop the engine stops, even though the clutch is disengaged fully and im revving the ****e out of it

2) when accelerating from a stop/slowly rolling, the engine makes a loud whiny sound that goes away almost completely once i gain some speed

3) there is black oily goo coming from the head gasket area. upon closer inspection there is a small gap between where the cylinder head attaches to the rest of the engine, i can see right through the gap around the corners. i tried tightening the bolts but they are as tight as they can be and there is still a gap. still runs for some reason, despite the little gap.

4) i noticed when riding that once in a while there is a louder than usual popping sound and a momentary loss of power.

5) inconsistent operation, sometimes it runs great, sometimes lousy, what gives?

6) some fuel is leaking out of the carb on the primer/idle screw side, not a lot, but its there. doesn't look like is coming from the fuel line or where the carb attaches to the manifold.

any ideas?

**Bikeguy Joe** · #2 07-01-2009, 11:05 PM

Running rich, head gasket is leaking and the clutch is dragging a bit.

**Bikeguy Joe** · #3 07-01-2009, 11:06 PM

...and your float may be sticking.

Mike Hunt · #4 07-01-2009, 11:30 PM

running rich as in too much oil or not enough air?

will that liquid gasket stuff in a tube help with the leak, or is it better to replace it?

Pablo · #5 07-02-2009, 12:21 AM

Best to pop head off and sand/polish on wet sandpaper on a piece of glass. I had to do this with my very unflat slant head. Worked like a champ.

**Bikeguy Joe** · #6 07-02-2009, 07:27 AM

Quote:

Originally Posted by Mike Hunt

running rich as in too much oil or not enough air?

will that liquid gasket stuff in a tube help with the leak, or is it better to replace it?

If you are running any richer than 24:1 you are too rich in oil but, I am thinking your float is sticking once in awhile causing a too rich in fuel mixture from you description.