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Norm's 2 stroke repair center Having problems with you 2 stroke motorized bicycke engine? Just ask Norm. he loves to tinker and troubleshoot engines.

can't find an answer then ask me


Discussion at Motorized Bicycle Engine Kit Forum in the Norm's 2 stroke repair center forum. Hello Norm, I am having some issues that I hope that you can hopefully help me out with. I have ...
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  #81 (permalink)  
Old 10-26-2009, 09:29 PM
Motorized Bicycle Newbie
 
Join Date: Oct 2009
Location: colorado
Posts: 7
Default Re: can't find an answer then ask me

Hello Norm,

I am having some issues that I hope that you can hopefully help me out with.

I have full writeup of my problem here:

new member - first install - questions? of course

Basically I am having an issue with either the rear side of the clutch dragging or the cross shaft dragging. In order to determine which is my problem I am proposing that I totally remove the large gear/clutch assembly as you show here:

bicycle engine total tear down


If I remove the large gear/clutch assembly can you verify that the cross shaft should spin freely? answer: with just the clutch arm pulled in the cross shaft should spin freely as long as your clutch is adjusted properly.

If this is true, I need the following questions answered:

1. Is the bolt that holds the large gear on standard or left hand threaded.

answer: it is a right hand thread. If you want to remove any of the gears or sprocket nuts jam a rag between the large gear and small gear to lock up the engine and then you can remove the nuts on the sprocket or large gear the screw slot on the small gear can be a booger to get loose if you do not have a impact hammer tool.Norman

2. Where can I get the puller that is require dto remove the gear, do you have a part #?


answer: If your engine kit didn't come with the puller you can order them from one of the vendors on this forum.Norman


Thanks!!


-Justin

Last edited by Norman : 10-28-2009 at 11:25 AM.
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  #82 (permalink)  
Old 10-26-2009, 10:33 PM
Motorized Bicycle Senior Member
 
Join Date: Oct 2009
Location: Winona MN (southeast MN)
Posts: 68
Default Re: can't find an answer then ask me

i have another one...i went to a website that sold parts for 2 stroke bike engines and they sell a 410 chain if i get one of those will it still work and is it easier to take the links out

answer: I don't know if the 410 chain will fit you might want to take a sprocket off the bike and see if it will fit on the sprocket. I have no idea if it would be any easier to break the links my guess is no it will take some work to get it apart. I did buy a bike chain at walmart that a walmart chain breaker will not work on. The walmart chain breaker is not a very good chain breaker either they seem to break before the chain does. Norman

Last edited by Norman : 10-28-2009 at 11:30 AM.
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  #83 (permalink)  
Old 11-03-2009, 10:29 AM
Motorized Bicycle Member
 
Join Date: Oct 2009
Location: orlando
Posts: 25
Default Re: can't find an answer then ask me

Quote:
Originally Posted by Norman View Post
I'll work with you on the problem with your bike if you can't find the answer here on the forum.
I might be able to answer you questions on a 4-stroke as well.
This should be fun for a big problem you can call me. PM me for my number.
Norman
hi norman i got 4 bikes well yesterday i washed them and well to of them and got water in the case the magneto shorted out is there any way to fix them i checked the ristance on my other motor from blue to ground and was 355 and on the dead ones got nothing did i just short a wire out or somthing same thing on both of them it sucks it how me and my girl ride good thing i got 4 of them i guess

let them dry out good then try it make sure all of the soldered connections are still good one soldered wire is very hard to see and you might need to remove the mag coil to see it. It's soldered to the frame of the coil. you might have the kill switch shorted out if you drowned the bikes with water or a loose connection in the wiring. check the spark plugunder the boot of the plug make sure its dried out well.

Last edited by Norman : 11-03-2009 at 10:00 PM.
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  #84 (permalink)  
Old 11-03-2009, 05:17 PM
karma1968's Avatar
Motorized Bicycle Member
 
Join Date: Oct 2009
Location: hamilton
Posts: 27
Default Re: can't find an answer then ask me

Norman i see you sell lights. i was wondering is the rear light a bulb or led?
and whats the voltage for the front bulb 3 volts?
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  #85 (permalink)  
Old 11-03-2009, 09:55 PM
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Location: pampa texas
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Default Re: can't find an answer then ask me

rear light is a LED
front bulb is 6 volt
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  #86 (permalink)  
Old 11-04-2009, 07:06 PM
Prasinos's Avatar
Motorized Bicycle Elite Member
 
Join Date: Dec 2008
Location: CT
Posts: 144
Default Re: can't find an answer then ask me

hey even though this is not motor bike specific, a radial bearing is designed to support a load from what direction?
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  #87 (permalink)  
Old 11-05-2009, 10:14 AM
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Default Re: can't find an answer then ask me

if you want to know the answer.Look here
HowStuffWorks "How Bearings Work"
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Last edited by Norman : 11-05-2009 at 10:27 AM.
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  #88 (permalink)  
Old 11-05-2009, 09:14 PM
Motorized Bicycle Senior Member
 
Join Date: Oct 2009
Location: Winona MN (southeast MN)
Posts: 68
Default Re: can't find an answer then ask me

has anyone put there stock gas tank onto a rear bike rack??????
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  #89 (permalink)  
Old 11-05-2009, 10:57 PM
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Default Re: can't find an answer then ask me

yes they have there is photos of some on this forum but just where I don't know, you might try using the search and see if you can find them. I know some of the vendors here even sell fuel tanks that are made to be mounted on a rack.
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  #90 (permalink)  
Old 11-06-2009, 05:07 AM
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Join Date: Sep 2009
Location: Australia - Melbourne
Posts: 44
Default Re: can't find an answer then ask me

Hi Norman

I've done a search for crankshaft balancing and it turned up nothing on the correct weight to remove and how and where to remove it from an 80cc style 2-stroke engine.

I am having serious difficulty finding a competent machinist in my area who knows how to balance and true a 2-stroke single cylinder crankshaft.

Hi-res photos would be greatly appreciated.

Cheers Fabian
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