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Motorized Bicycle General Discussion All topics regarding bicycles with engines.

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  #1011  
Old 05-01-2016, 05:17 PM
BOYGOFAST BOYGOFAST is offline
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Location: Citrus Springs Fl.
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Default Re: Motorized Bicycle Take a Tip...Leave a Tip

http://youtu.be/lssQ4-mPq1E


OK, I've not posted here in a while. I've placed a link to show my progress and although I deleted some of the recording time I've held on one or two videos. This is a simple video shows off an old seconds Montgomery Wards 30's bike frame. I got lots of parts to play with but this is what I've managed so far. This setup is a 48 cc 2 stroke the piston ID is punched out as much as anyone dare to and the connecting rod is ground round on each side to remove weight as well allow increased millimeters vacuum area. Setup includes 50 mm air-oil fork, 3 piece crank and conversion kit for peddle power reeds mini expansion chamber RSE Reed Kit Rocket CDI and Regina 415 just added a GT 5 billet aluminum cylinder head it fits and fires well so far, not shown only run it for a minuet had to replace the gasket on the reed kit.This bike has three welded motor mounts the frame is 42'' x 18''.Still awaiting a few parts. This bike is one of the tougher bikes anyone could work with and yeah the frame had to be cut and re welded to fit the sprocket in place top speed with a 44 T on this setup is slightly better than 30 mph currently the 48 cc is choice over the 66/80 here it is lighter with less vibration at upper RPM level but less torque at lower RPM. Enough coaster brake most of the time .
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  #1012  
Old 05-01-2016, 11:06 PM
bluegoatwoods's Avatar
bluegoatwoods bluegoatwoods is offline
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Join Date: Jul 2012
Location: Central Illinois
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Default Re: Motorized Bicycle Take a Tip...Leave a Tip

Quote:
Originally Posted by hazzardous1 View Post
so does anyone know the hub diameter for the huffy cranbrook beach cruiser in going to get one of the hub attachments for the sprocket and chain drive and would verry much like to get the right one
If memory serves, they are 1.5 inches exactly. I can verify that within 24 hours or so. But I think you can count on it.

You'd be well served to get yourself a set of calipers. The average motorized bicycle rider (who's also the mechanic, after all) doesn't need any specialty tools. But there are a few that are very, very handy to have. This is one of them.

And they can be had for less than a 20 dollar bill these days from Harbor Freight. Amazon, too, I'll bet.
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  #1013  
Old 05-03-2016, 10:32 PM
brackitt brackitt is offline
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Join Date: Apr 2016
Location: delaware
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Default Re: Motorized Bicycle Take a Tip...Leave a Tip

im new to this great hobby are there any tips on keeping 2 stroke motor cool and keeping the temp. down
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  #1014  
Old 05-06-2016, 08:43 AM
curtisfox curtisfox is offline
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Default Re: Motorized Bicycle Take a Tip...Leave a Tip

Seems that a lot of people think they can't use 3/4" clutches on 5/8" shafts, but you can get sleeves with the key slot in,so they will fit. Just have to get the right keystock, like 3/16" x 1/4". I did a search and found mine at Fastenal. Had some old clutches and just didn't want to by new when i had good ones, ( hope they are good) ............Curt
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  #1015  
Old 05-06-2016, 11:11 AM
brackitt brackitt is offline
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Join Date: Apr 2016
Location: delaware
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it seem like I spend 4 hrs a day messing around with the bike and always coming up with new ideas and ways to improve on it. I haven't had any problems with it. im hooked bad I just love tinkering around with it. Any advise on the break in period ? how much oil the best type to use ? how long should I ride before stopping for a cool down. im running Lucas 2 cycle 18:1 still on first tank
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  #1016  
Old 05-06-2016, 05:38 PM
MEASURE TWICE MEASURE TWICE is offline
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Default Re: Motorized Bicycle Take a Tip...Leave a Tip

Quote:
Originally Posted by curtisfox View Post
Seems that a lot of people think they can't use 3/4" clutches on 5/8" shafts, but you can get sleeves with the key slot in,so they will fit. Just have to get the right keystock, like 3/16" x 1/4". I did a search and found mine at Fastenal. Had some old clutches and just didn't want to by new when i had good ones, ( hope they are good) ............Curt
On the opposite note:

The other way from 3/4 to 5/8 shaft reducer is something I was looking to find at one time. Unfortunately it is not just that the shaft is lengthened in the process, but I found the cost of the item varies between 100 to 400 dollars. If anyone sees shaft reducers that are less cost, then rather than buying another clutch I might use one of these. It is also pertinent to know if the belt or chain is going to fit in the new location further from the crankcase wall.

MT
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  #1017  
Old 05-08-2016, 07:12 AM
curtisfox curtisfox is offline
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Default Re: Motorized Bicycle Take a Tip...Leave a Tip

Quote:
Originally Posted by MEASURE TWICE View Post
On the opposite note:

The other way from 3/4 to 5/8 shaft reducer is something I was looking to find at one time. Unfortunately it is not just that the shaft is lengthened in the process, but I found the cost of the item varies between 100 to 400 dollars. If anyone sees shaft reducers that are less cost, then rather than buying another clutch I might use one of these. It is also pertinent to know if the belt or chain is going to fit in the new location further from the crankcase wall.

MT
Here ya go take your pick, different lengths. https://www.google.com/?gws_rd=ssl#q...educer+bushing ..........Curt
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  #1018  
Old 05-08-2016, 09:21 AM
rager.eric@yahoo.com rager.eric@yahoo.com is offline
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Default Re: Motorized Bicycle Take a Tip...Leave a Tip

I am extremely diassappointced in this engine (60cc bicycle flying horse). build went well,fired right up! HOWEVER after about 10 days
the clutch goes up!?. New pads easy to get. The clutch however was near impossible to get right. it had to be absolutely perfect!!!! not easy!!! ok alright. 3 rides (maybe 5 miles) the magneto goes NO SPARK!!! There not to many more parts left to go bad in such a simple engine. I was impressed with the build and first start of this machine and bought another one for backup. THIS WILL BE THE LAST ONE I EVER LOOK AT!!!! I got two years out of my first machine. they were great! If possible i guess i will go back, if not, i will find another. I am sure it wont be hard. I will be posting this letter on all the web-sites and forums that I have encountered along my journey. dont mean much but maybe i have alittle respect out there.
VERY DISAPPOINTED
ERIC
rager.eric@yahoo.com
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  #1019  
Old 05-08-2016, 08:52 PM
MEASURE TWICE MEASURE TWICE is offline
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Default Re: Motorized Bicycle Take a Tip...Leave a Tip

Quote:
Originally Posted by curtisfox View Post
Here ya go take your pick, different lengths. https://www.google.com/?gws_rd=ssl#q...educer+bushing ..........Curt
5/8 Clutch on a 3/4 shaft needs one of these, but you might as well just buy another clutch that fits 3/4 shaft. See opposite from larger shaft to smaller shaft conversion not economical. Ebay is like the cheapest, others up to 200 dollars seen elsewhere.

http://www.ebay.com/itm/SHAFT-Step-D...25.m3641.l6368
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  #1020  
Old 06-04-2016, 09:13 PM
curtisfox curtisfox is offline
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Default Re: Motorized Bicycle Take a Tip...Leave a Tip

Ya ! but would also move it out to far from the engine, best would be to use jack shaft and put the clutch on it..............Curt
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