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Motorized Bicycle General Discussion All topics regarding bicycles with engines.

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  #3841  
Old 06-17-2012, 10:11 AM
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Quote:
Originally Posted by tooljunkie View Post
try to find a small piece of tubing that fits in the hole,and a drill that fits the tubing.it will keep the bit close to center allowing you to get a mark started for drilling.
i have done this with good success.
a centre punch,good and sharp and a teenie drill bit will get it started too.
a pilot hole is always a good way to start.

third is for hard bolts,a carbide burr in (i prefer the ball shape) a slow drill will grind away the broken bolt.very slow and compressed air to blow away the chips.
i was the broken bolt guru in the shop i worked in for a few years,exhaust manifolds were my forte'
Cool tip/trick FD! I always mess up the pilot.

Gonna try that. Thanks!
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  #3842  
Old 06-17-2012, 10:20 AM
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Default Re: what did you do to your motor bike today?

i got a million of em,i just need to remember.
im fortunate enough to have a lathe,so i can make a drill bushing for any bore i need.
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  #3843  
Old 06-18-2012, 04:39 PM
Steve1990 Steve1990 is offline
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Default Re: what did you do to your motor bike today?

Test fit my engine in a '75 Schwinn Continental. I think it may be getting a new home.
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  #3844  
Old 06-18-2012, 06:09 PM
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Default Re: what did you do to your motor bike today?

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Originally Posted by Steve1990 View Post
Test fit my engine in a '75 Schwinn Continental. I think it may be getting a new home.
A nice, lightweight chrome-moly steel frame. They used brazed connections instead of the "lug" type. It should make a great Motorized. Send us some pic's when it's done.
Big Red.
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  #3845  
Old 06-18-2012, 06:39 PM
Steve1990 Steve1990 is offline
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Default Re: what did you do to your motor bike today?

ran into a hitch with it almost right away. Since it uses tall flange hubs, I can't bolt the sprocket to it. Not too big of a deal, I've got other hubs I can build the wheel around, just wasn't planning on rebuilding a wheel for this.
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  #3846  
Old 06-18-2012, 07:17 PM
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Default Re: what did you do to your motor bike today?

Hey Steve, You can enlarge the center hole of the sprocket. I do it all the time for coaster brake hubs. I did just notice that the Continental is one of those "skinny tire" bikes. To each his own, I just prefer building a bike with more rubber on the road. It is a great frame though.
fatdaddy.
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  #3847  
Old 06-18-2012, 08:06 PM
Steve1990 Steve1990 is offline
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Default Re: what did you do to your motor bike today?

Its not the bore size thats the problem, its the fact that the bolt holes on the sprocket aren't far enough apart to clear the hub flange. They actually line up perfectly with the part of the flange that the spokes pass thru.
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  #3848  
Old 06-18-2012, 09:35 PM
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Default Re: what did you do to your motor bike today?

That would be an awfully large hub flange. is it this one? This is an original 1975 rear wheel, or so the dude claims. It doesn't look all that big in the pic. But I guess you would know. How about a pic of it?
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  #3849  
Old 06-18-2012, 11:30 PM
Steve1990 Steve1990 is offline
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Default Re: what did you do to your motor bike today?

That isn't a '75 hub, but it is the same size. A '75s hub has triangular openings, otherwise the same. Its not really that big, just big enough that the holes in the sprocket don't clear the edge of it.
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  #3850  
Old 06-19-2012, 01:11 AM
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Default Re: what did you do to your motor bike today?

Might be a stupid idea. If it only misses by a LITTLE bit, take a small round file and notch out for the bolts. I've done it on a OCC with the big flange, worked great.
fatdaddy.
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