chain issue?

M

mobbin

New Member
bike was riding well and all of a sudden the bike stops at every half turn of the wheel. the chain doesnt seem to be stuck at sprocket when turning, has anyone had this issue? im thinking of trying to adjust the clutch under the cover. any comments advice??

80cc 2 stroke
 
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Yes, DONT ADJUST THE CLUTCH.
If it stops every half turn of the wheel, its the wheel. That would make the engine turn over several times with each full turn, so its not the engine.
 
I also agree. Leave the clutch alone, especially the flower nut!

I'm not clear on exactly what your problem is. "the bike stops at every half turn of the wheel" Is this with the engine not running and with the clutch lever pulled in?

If the clutch is not fully disengaging when you squeeze the handlebar lever the problem is more than likely the clutch cable adjustment. Too much slack. It's common for the cable stop to slip on the cable where it attaches to the clutch actuator arm on the engine. New cables can also stretch initially. Try tightening the cable until there is very little to no slack. Not bow string tight, just enough to take any sag out and report back.

You also said the chain doesn't appear to be "stuck on the sprocket". Nevertheless a loose chain can and will bind or 'bunch up' around the engine drive sprocket. Your chain tension should be set to 1/2" to 3/4" of slack. More than that and it can bind and stop the rear wheel from turning.

Tom
 
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a sprocket out of alignment in the up/down direction will have a tight spot in the chain every 180degrees - adjust your tensioner at the tightest spot of the chain run

if this leaves the chain way loose at some points, re-align the sprocket
 
Yep, what crassius said. Still, unless your chain is very tight, it shouldn't lock up unless the sprocket is REALLY out of whack.
 
grab a ruler and measure the gap between the end of the sprockets teeth and the spokes, it should be the same distance (or very close) all the way around the sprocket.

it sounds like your sprocket is off a little. if so, you just need to tighten the loose sprocket/rag joint bolts.
 
a twisted chain could do that too, catching on the housing when the bent section rolls through...
 
See if a couple drive-sprocket-bolts on your rear wheel hub might be hitting the brake arm. Or something similar, depending on how you've attached the drive sprocket. Do you have a coaster brake on the rear?
You could be looking at spending some time holding in the clutch and turning the rear wheel and just staring at every single little thing that moves back there.
 
Allen_Wrench said:
See if a couple drive-sprocket-bolts on your rear wheel hub might be hitting the brake arm. Or something similar, depending on how you've attached the drive sprocket. Do you have a coaster brake on the rear?
You could be looking at spending some time holding in the clutch and turning the rear wheel and just staring at every single little thing that moves back there.
Click to expand...

Excellent insight.
 
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