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Motorized Bicycle General Discussion All topics regarding bicycles with engines.

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  #3821  
Old 06-14-2012, 06:51 PM
bigbutterbean bigbutterbean is offline
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Location: Lebanon, PA
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Default Re: what did you do to your motor bike today?

Straightened out my rear axle, it was a little wobbly. its good now. took a grip shifter and turned it into a throttle so I could get rid of the cheap chinese junk plastic throttle. grip shifter had to go on the left handlebar, so its a bit of an adjustment, but its working good. i took the metal pawl out of the grip shifter, so no cruise control lol, but it works, better than the kit throttle did.
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  #3822  
Old 06-14-2012, 07:06 PM
xenodius xenodius is offline
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Join Date: May 2012
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Default Re: what did you do to your motor bike today?

I put a grip shifter on a few days ago as a clutch. =) Much better than the handle clutch that had to be mounted way up on the cruiser bars and doesn't work on my new straight bars. And it keeps the handlebars clean! It would actually be tempting to use a continuous-style thumb shifter as a throttle for cruising around, but I like my twist throttle for now. =)

Tonights projects; try to set up a choke control with a thumb shifter. =)
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  #3823  
Old 06-14-2012, 08:25 PM
Steve1990 Steve1990 is offline
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Location: I can see Detroit from here!
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Default Re: what did you do to your motor bike today?

Took the engine off to revisit the busted motor mount. got a couple of new ideas that may work.
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  #3824  
Old 06-14-2012, 09:58 PM
KANNONBALL13 KANNONBALL13 is offline
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Default Re: what did you do to your motor bike today?

I destroyed my motor!
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  #3825  
Old 06-14-2012, 10:35 PM
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tooljunkie tooljunkie is offline
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Default Re: what did you do to your motor bike today?

i hit 46 kph today.
cant get the chain set to my satisfaction.too tight. if i add a link,my tensioner wont take up the slack.
like a dodo,i welded it to the frame in exactly the wrong spot.i might make a new longer bracket,slot it to take up about two links.
put about 10 kilometres on it without a hiccup.the more i run it ,the faster it goes.
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  #3826  
Old 06-15-2012, 10:26 AM
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killercanuck killercanuck is offline
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Default Re: what did you do to your motor bike today?

TJ, you could try a homemade Spring tensioner, or shim the rear mount to take out more slack and even take off the idler all together. Something like VeniceMB's Idlerless Shim kit. (not sure if he still makes those)

Use the welded bracket for a trailer hitch.
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  #3827  
Old 06-15-2012, 01:48 PM
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fatdaddy fatdaddy is offline
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Default Re: what did you do to your motor bike today?

Quote:
Originally Posted by Steve1990 View Post
Took the engine off to revisit the busted motor mount. got a couple of new ideas that may work.
Front or Rear? (probably front.) I've dealt with A LOT of them.
fatdaddy.
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  #3828  
Old 06-15-2012, 02:17 PM
Steve1990 Steve1990 is offline
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Default Re: what did you do to your motor bike today?

Its actually the rear motor mount. broke right about the 400mile mark, so probably 200miles ago. its the left side, opposite of the clutch. When that happened I replaced the other 3 w/ grade-8 bolts. reworked the bracket for the rear mount and it is pretty solid, but the bike hasn't been running right for awhile and I noticed with it shaking as much as it does that their is more movement than I'd like in that mount. Worst part is, the stud is broken ~1/8 of an inch in, and I can't get a drill bit to NOT walk onto the softer aluminum to drill it out.
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  #3829  
Old 06-15-2012, 02:26 PM
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killercanuck killercanuck is offline
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Default Re: what did you do to your motor bike today?

Bummer Steve. Yea with a loose mount(or rubber, boo), the motor'll shake and foam the gas in the bowl, then it'll sputter and spit till you slow down or pull over for a minute.

I did a weird mod a while back on my beater bike, and Al.Fisherman added some great pics of his mods too. It's worth a read eh. http://motorbicycling.com/showthread.php?t=35936
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  #3830  
Old 06-15-2012, 02:42 PM
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fatdaddy fatdaddy is offline
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Default Re: what did you do to your motor bike today?

Quote:
Originally Posted by Steve1990 View Post
Its actually the rear motor mount. broke right about the 400mile mark, so probably 200miles ago. its the left side, opposite of the clutch. When that happened I replaced the other 3 w/ grade-8 bolts. reworked the bracket for the rear mount and it is pretty solid, but the bike hasn't been running right for awhile and I noticed with it shaking as much as it does that their is more movement than I'd like in that mount. Worst part is, the stud is broken ~1/8 of an inch in, and I can't get a drill bit to NOT walk onto the softer aluminum to drill it out.
Yep, Sometimes those things are a bear to get out. Try a small center punch to get you started, ( a GOOD one.) Buy a real good one if you have to. It's cheaper than a new motor or case.
fatdaddy.
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