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2 Stroke Bicycle Engines & Kits 2 stroke motorized bicycle engine kits need careful installation and setup, find out how from our professionals here!


Spark Plug = no rear movement

2 stroke motorized bicycle engine kits need careful installation and setup, find out how from our professionals here!


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  #11  
Old 03-24-2013, 12:34 PM
jliehr jliehr is offline
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Default Re: Spark Plug = no rear movement

Great, watching it now. Thank you.
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  #12  
Old 03-24-2013, 12:54 PM
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Default Re: Spark Plug = no rear movement

This> http://motorbicycling.com/showthread.php?t=22729 is one of the best and most easily understood tutorials on proper clutch adjustment. Thanks to Gearnut for it.

In addition to your clutch not being adjusted properly the clutch pads could be stuck. This is a common and easily fixed problem. You can find the remedy if you use the Google Custom Search and use the key words "Stuck Clutch Pads". Good luck.


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Last edited by 2door; 03-24-2013 at 12:57 PM.
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Old 03-24-2013, 04:04 PM
jliehr jliehr is offline
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Default Re: Spark Plug = no rear movement

Hey guys, I am getting very angry with the bike as I've done all the above steps multiple times and the bike still will not move. I am posting more pictures of the clutch itself below, please tell me if there is something I've done wrong or out of the ordinary as I'm already bashing my head in on the seat on this one.

http://imgur.com/a/44qPH


Thank you.
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Old 03-24-2013, 05:29 PM
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Default Re: Spark Plug = no rear movement

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Originally Posted by jliehr View Post
Hey guys, I am getting very angry with the bike as I've done all the above steps multiple times and the bike still will not move. I am posting more pictures of the clutch itself below, please tell me if there is something I've done wrong or out of the ordinary as I'm already bashing my head in on the seat on this one.

http://imgur.com/a/44qPH


Thank you.
First thing to do is remove and discard the small spring between the cable guide and the clutch actuator arm. It serves no useful purpose except to make the clutch harder to pull.

There is a jam nut on the cable guide. If you loosen it you can rotate the guide so it points more directly toward the clutch actuator arm. Retighten the jam nut.

Next run the handlebar lever adjustment all the way in toward the lever then tighten the cable stop so you have little to no slack in the cable. Don't make it bow string tight but just snug. Some say to give yourself some slack, maybe 1/8" of free play. I prefer tighter than that.

After you do those things get back to us with what happens.

Tom
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Old 03-24-2013, 08:04 PM
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Default Re: Spark Plug = no rear movement

Make sure the chain is not hung up on the inside of the sprocket cover. I've had some kits that required grinding the cover, as well as some that needed the edges ground off the sprocket teeth to allow the chain to move.
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Old 03-24-2013, 08:30 PM
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Default Re: Spark Plug = no rear movement

that spring goes over the cable "sheath" and is located where the clutch cable runs close to cylinder.to keep from overheating cable.

my engine was tough to get rolling at first. it took some hard pedaling and a few attempts to get it rolling enough to make it fire.
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Old 03-24-2013, 08:49 PM
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Default Re: Spark Plug = no rear movement

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Originally Posted by tooljunkie View Post
that spring goes over the cable "sheath" and is located where the clutch cable runs close to cylinder.to keep from overheating cable.

my engine was tough to get rolling at first. it took some hard pedaling and a few attempts to get it rolling enough to make it fire.
Sorry TJ but the small spring isn't a sheath. The larger one is and protects the cable from heat and chafing against the cylinder fins. The smaller spring that the kit instructions tell you to put on the cable between the clutch arm and the cable guide is not needed and only increases the clutch pull force. It is not required to pull the clutch to the engaged position.

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Old 03-24-2013, 08:54 PM
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Default Re: Spark Plug = no rear movement

You are right tom, my mistake. I thought it was the bigger spring on there
Guess i need to pull the beast out of winter
Storage and refresh my memory.
My apologies to op if i created any confusion.
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Old 03-25-2013, 08:42 AM
supercub supercub is offline
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Default Re: Spark Plug = no rear movement

Best thing to do to understand the hangup is to go on ebay and buy a gear puller for less than $10.00- Boygofast or any bike engine seller. You can use the puller for the small crank gear, clutch, and the sprocket. Take the small crank gear off first. Watch the woodruff key. Push the piston down with a piece of wooden dowel rod. If it is free, remove the chain and turn the clutch. It should rotate. You will need this tool for future work you can count on it.
I use the spring over clutch cable just so the arm doesn't vibrate around. Any little thing on these bikes will make alot of noise if not battened down.
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