wider crank spindle

[wildnwooly]

i am attempting to install a 80cc happytime on a '86 schwinn sierra mountaIN BIKE, THE CRANK SIDE PEDAL CLEARS BY 3/4".

PROBLEM IS LEFT SIDE HITS ENGINE BY 3/8". I CANT FIND A SPINDLE THAT IS LONGER. THIS IS AN OLD BIKE AND PARTS ARE HARD TO FIND. IF I COULD JUST GET A LONGER SPINDLE THAT ALL THE OTHER HARDWARE WOULD FIT ON/

:???:

 

[ocscully]

There is a company that makes electric motor kits for bikes that mount down around the bottom bracket and they have a couple of longer BB Spindles for the old style cup bottom brackets. I just tried to search here for the threads that have links to this company but didn't find them. Maybe someone else will have better luck. Augi provided the link I remember but perhaps it was one of the threads that was deleated? If you go this route you need to be aware that you may adversly affect the chain-line for your pedal drive train.

ocscully

 

[wildnwooly]

i have been researching for 2 days now. i found out the type of spindle i need.
it is a JIS(japanese industrial standard?) square taper bottom bracket spindle.

on a chart i found on the internet it would be a 3X. it is a 68/133mm which means it fits in a 68mm shell(that is the part of the bottom bracket that the axel sits in, and 133mm long not counting the threads. in fact the threads are either a screw or bolt type.

Now i am having much trouble finding it as it is so old.

 

[wildnwooly]

more...

Good, my picture worked. The picture is of the old spindle. the new one would look very much like the old one but with the dimensions on the picture.

i posted a picture in hopes someone will se it and say "oh, ive got some of those laying around", or know where to get one.

 

[datz510]

If the crank is steel, what about heating and bending it to clear the engine?

 

[wildnwooly]

heat and bend

i think murphys law has taken effect here as the crank arms are aluminum. i dont think i can grind off as much as needed without weakening them.

i looked for the crank kits on other sites and havent found them yet.

where i bought it, spookytooth, they have some crank sets that i dont think will work, but dont know yet as there are no pictures and very little descriptions. waiting for email reply on that.

i was kinda hoping some people here had converted mountain bikes before that could help?:???:

 

[frameteam2003]

gotta love having to special build a part just for you bike!
Maybe find an old spindel ,cut off a side and have a welder weld it to your spindel for the extra length.Alum doesn't bend(well)and grinding it would weakin it--so modifing the arm seems to be out.

 

[ocscully]

I found the part i was thinking of. Its sold by Cyclone-USA and here is the link, it's 3/4 of the way down the page http://www.cyclone-usa.com/store.php?crn=203 Alas they say that they are temporaly out of stock. You may want to contact them to see if they will be getting them in soon?

ocscully

 

[wildnwooly]

ocscully is my hero!

you wouldnt believe how much i have researched and looked and called and posted, etc. to find something like that!

i cant believe nobody even vendors if they read their own forums or this one seem to be brain dead when it comes to a problem like this.

literally, i was so disillusioned with this project i was going to take a sledge hammer to the motor. seriously.

two products on that link would work out perfectly. i thought i was explaining my problem correctly, and i thought maybe people just didnt know or were uncaring as to my particular problem.

the products are more than i wanted to pay, but i couldnt get a resolution at any price.

i am sure there are problems to come but getting past the fact the pedals hit the engine pretty much nixed all others.

i have to thank you very much and must say your are evidently very knoweldgable, diligent and thoughtful.

i went to work this morning sooo ****ed off thinking what a bunch of morons and illiterates and @$!@$s and i didnt want anything to do with this hobby any more!

ive learned to try harder and be more explicit when i have problems in the future.

ocscully, i owe you big time!

thanks

 

[graucho]

Here is a wide crank Kit, maybe you saw it already. Good luck.
http://www.bicycle-engines.com/wide-crank-pedal-p-106.html