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Motorized Bicycle Trouble Shooting Use this area to post problems that may arise, if you could use some help in figuring out what is wrong with your engine and what needs to be done to achieve top performance.

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  #11  
Old 07-10-2012, 02:13 PM
JCG JCG is offline
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Default Re: So your HT won't start, well let's take a look

OEM ??? Is that a brand?
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  #12  
Old 07-10-2012, 02:19 PM
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killercanuck killercanuck is offline
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Default Re: So your HT won't start, well let's take a look

OEM = Original Equipment Manufacturer, the stocker.
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  #13  
Old 10-31-2012, 01:57 PM
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BikeBerryKelci BikeBerryKelci is offline
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Default Re: So your HT won't start, well let's take a look

Quote:
Originally Posted by 2door View Post
Allow me to elaborate on Al's check list, item #1.

The plug in connectors that come in the kit, the ones on the blue and black wires from the engine and the CDI, are notorious for bad electrical connections. I had one, on the blue wire from the magneto, that was crimped onto the insulation and not the conductor. One of the best things you can do when installing the engine on your bike is to cut off and discard those little push-together bullet connectors then solder the wires together and protect the connections with heat shrink tubing.

Item #1 under the fuel heading:
Every kit supplied tank I've seen, and I've seen a few, needed to be cleaned of rust and dirt as it came from the factory. Installing one without at least rinsing it with fresh gasoline is almost a sure way to quickly clog the in-tank filter/petcock. A clean fuel delivery system is essential to a good running engine.

Al, back to you.
Tom
Great advice!!!
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  #14  
Old 12-12-2012, 10:01 PM
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dontellmymom dontellmymom is offline
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Default Re: So your HT won't start, well let's take a look

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Originally Posted by JCG View Post
I can't start the bike. Seems electrical. I did the tests listed above on Al. Fishermans 11/09/11 post. Items 1 - 3 OK Item 4. Ohms between black and white mag. wires=2.9 ohms. Ohms between blue and white mag wires = 332 ohms. Item 5.CDI test.Positive blue to negative black = no activity. Positive black to neg. blue=varies from 38.6k to
41.9k ohms.Pos on spark wire to neg blue=varies from 41.9k to 50k ohms. Between spark plug wire and black=2.2k ohms. So.......I assume the CDI is bad? What would have caused that? When checking for spark, I took out the plug and grounded it on the head and cranked the engine. I saw a blue spark. Could this have damaged the CDI?
Hey JCG,

Did you ever get the bike running? Was it the CDI? haanh?

Thanks for the info.

Be Safe.
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  #15  
Old 01-13-2013, 03:07 AM
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Tyler6357 Tyler6357 is offline
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Default Re: So your HT won't start, well let's take a look

great tips!
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  #16  
Old 02-13-2013, 05:29 AM
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blunted429 blunted429 is offline
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Default Re: So your HT won't start, well let's take a look

i am about to post pics of the silicone job i did for the wires.
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  #17  
Old 04-27-2013, 09:45 PM
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AzRigidRider AzRigidRider is offline
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Default Re: So your HT won't start, well let's take a look

Hey everyone I'm Alex, I know this isn't the introduction page but I've peeked around a little and finally registered. The info and atmosphere here is on point! I've been scootin around on my 66cc motorized bicycle for a couple months now without any MAJOR problems however about a week or so ago I was on my way home from work and my motor seized, obviously compromising piston and cylinder but without and further damage... I believe. Crank still rotates smooth as can be so I ordered a jakes jug and cut on piston from jakebike.com and installed accordingly but WILL NOT start whatsoever! That being said I have looked everything over top to bottom and it all seems to be in order. I am stuuuumped! If anyone has an idea I'd greatly appreciate any input!
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  #18  
Old 04-27-2013, 11:26 PM
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Tyler6357 Tyler6357 is offline
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Default Re: So your HT won't start, well let's take a look

Quote:
Originally Posted by AzRigidRider View Post
Hey everyone I'm Alex, I know this isn't the introduction page but I've peeked around a little and finally registered. The info and atmosphere here is on point! I've been scootin around on my 66cc motorized bicycle for a couple months now without any MAJOR problems however about a week or so ago I was on my way home from work and my motor seized, obviously compromising piston and cylinder but without and further damage... I believe. Crank still rotates smooth as can be so I ordered a jakes jug and cut on piston from jakebike.com and installed accordingly but WILL NOT start whatsoever! That being said I have looked everything over top to bottom and it all seems to be in order. I am stuuuumped! If anyone has an idea I'd greatly appreciate any input!
I would replace the head gasket if you installed a new piston and jug. You might want to check gasket at the cylinder/bottom end seal as well. Also, make certain that you are getting a spark and that the carb is clean and flowing gas.
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  #19  
Old 04-28-2013, 12:06 PM
crassius crassius is offline
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Default Re: So your HT won't start, well let's take a look

these days there are diff pistons & barrels out there to fit the diff rod lengths - first step would be to compare your old one to the new one to see that all measurements are the same
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  #20  
Old 04-28-2013, 08:19 PM
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AzRigidRider AzRigidRider is offline
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Default Re: So your HT won't start, well let's take a look

Quote:
Originally Posted by Tyler6357 View Post
I would replace the head gasket if you installed a new piston and jug. You might want to check gasket at the cylinder/bottom end seal as well. Also, make certain that you are getting a spark and that the carb is clean and flowing gas.
Hmm good call Tyler, I haven't replaced head gasket but did get a bottom gasket along with jug and piston with upper needle bearing and wrist pin. As far as spark haven't been about to confirm sparking I will have to take an ohm reader to magnito and ignition. I've got a NGK bp7hs that isn't even a month old with minimal carbon build up but guess there's a chance of it being foul if ohms check out. And for carb, is there any specific methods for checking good flow?
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