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Mounting Techniques Every frame is different. Share and ask questions about mounting your motorized bicycle engine kit to your bicycle frame or bicycle rack

OVERSIZED TUBING solved


Discussion at Motorized Bicycle Engine Kit Forum in the Mounting Techniques forum. very nice mounts, look like they should be part of a upgrade package for us oversized tubing guys...
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  #31 (permalink)  
Old 10-10-2008, 11:21 PM
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Default Re: OVERSIZED TUBING solved

very nice mounts, look like they should be part of a upgrade package for us oversized tubing guys
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  #32 (permalink)  
Old 10-10-2008, 11:28 PM
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Default Re: OVERSIZED TUBING solved

I will have my drill press back monday, see the tavern (and justice for all). Ive had it! I'm going to take alum. billet and make my own. I think drilling a hole in an alum. frame in the down tube is just asking for it. Stainless allen bolts counter sunk then form fitted to the frame. Both mounts. I have 20-30 hours in something that should have taken a few minutes. If that don't do it I will have alum. plates welded to the motor it's self. I have to take it apart, no big deal. I can take a GSXR 1100 apart and rebuild the tranny I can sure handle this. This is MY ride. These other bikes are just inventory. It's a passion, a way of life. I eat,sleep,dream,bikes. All kinds. The bike told me I can't do it Love it!
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  #33 (permalink)  
Old 10-11-2008, 12:40 AM
Motorized Bicycle Apprentice
 
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Smile Re: OVERSIZED TUBING solved

This mount looks great, if you are in a hurry I have another solution. On my first build I mounted the engine to high in the frame (the frame tube was about 2" wide. I drilled through the frame and had to use a longer bolt to align with the holes in the bottom of the engine. This lasted about 3 days before it broke. I cut a peice of tubing from an old seat post, cut it to length and rounded the bottom with my grinder. I took the bike to a muffler shop, I had them weld the tube to the frame and the flate plate (with the two holes) welded to the top of the tube. Then all I had to do was screw the two bolts into the engine. A little paint and it looks great. They charged me $10.00 for the welding.
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  #34 (permalink)  
Old 10-11-2008, 02:27 PM
Master Motorized Bicycle Builder
 
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Default Re: OVERSIZED TUBING solved

Go to install pages last page down at the bottom and you will see how to do the front mount so it will last. It requires drilling. If you do not want to drill, then you will have to find another method of mounting. So far, I have only drilled. I do have some clam adapters that some have been using and like them, but I have never tried them so I can not say . Enjoy the ride..
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  #35 (permalink)  
Old 10-12-2008, 03:50 AM
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Default Re: OVERSIZED TUBING solved

These ch can be drilled out at the stud holes on the eng block, I use 5/16, or 8mm grade eight now.
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  #36 (permalink)  
Old 10-12-2008, 11:42 AM
Motorized Bicycle Builder
 
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Default Re: OVERSIZED TUBING solved

Quote:
Originally Posted by datz510 View Post
Be careful using straight U bolts on an aluminum frame... they will eventually tear through the frame with the vibration.

I have a design here that will distribute the loading over a larger surface area, preventing metal fatigue in these newer (thinner and lightweight) aluminum frames:


I'll post some photos of the finished product in a few minutes. Just finished them about 30 minutes ago.
thanks for the pic...im building a gary fisher aluminum...ive bought everthing from pillow block housing...which seem good....to clam shell brackets...hangers...building steel brackets...what kind of material are you using to protect the frame...?i went to leather...went away from rubber...if you get this message please respond...i think you are on the right track...just no for aluminum but everthing...thanks...dennis
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  #37 (permalink)  
Old 10-12-2008, 06:42 PM
Motorized Bicycle Builder
 
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Default Re: OVERSIZED TUBING solved

Quote:
Originally Posted by ebmvegan View Post
What if a piece of rubber was placed between the modded plate and a second steel plate for both the base and top connections to the bike frame. Would it limit the amount of vibration caused by the motor? Or would be so negligible that it would be a waste of time?
did you try this...im building my second bike and im thinking the same for the next motor mounts...materialscraps.com have different rubbers that work...rubber with cloth inserts will work great or vintron...a rubber that gas and solvent doesnt effect...let me know...dennis hofferber
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  #38 (permalink)  
Old 10-12-2008, 11:30 PM
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Default Re: OVERSIZED TUBING solved

i fabbed a clamp style on mine too it looks pretty clean im going to read the picture posting info tommarrow id like to add to the ideas im going to pass out !! peace!!
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  #39 (permalink)  
Old 10-13-2008, 01:37 AM
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Default Re: OVERSIZED TUBING solved

Cool site materialscraps.com tanx for the info!
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  #40 (permalink)  
Old 10-13-2008, 06:59 AM
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Default Re: OVERSIZED TUBING solved

thats what i ended up having to do ronnie only mine arent as thick that mount looks beefy clean too NICE!!!!!
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