Bombus Speedshop

Bombus Speedshop
Wrenchin' without supervision since the seventies...

Monday, February 24, 2014

The Beltdrive saga with 48 tooth

So when the dogcage was done the beltdrive adventures continued.
The good folks at BDL sent me a .020 undersize 48 tooth frontpulley.
Sadly that didn´t solved the problem. The belt was still way to tense.
I even had to do two "clutch hub pushers" to get the rear hub on to the coned shaft, that´s how tense the belt was.

And change from 130 tooth belt to next step, 132 was not possible according to BDL.
Even if the 8mm pich was the same the tooth profile was not.
So if I had used such belt I have destroyed it quickly said BDL.
I took the problem in my own hands and checked the "tooth clearance" between the belt and the stock pulley.
It was some play there so put the stock 48 tooth pully in my lathe and took it down .040.
The .020 that the undersize pulley had plus another .020.


But no still no luck, the belt still was way to tense.

The dogcage

A dogcage?
Yes, life ain´t just motorcycles.
Finally the scratchbuilt cage was done. The frame I made of 20mm square tubing.
I even made the grid out of welding rods and jointed it with silicon bronze.
The little rascal in his new carhome.

Monday, January 13, 2014

Beltdrive issues + dogcage...

The beltdrive circus took of just as the parts landed here in Sweden.
But when I first mounted the new goodies distaster occured.
The belt was to short, or at least that was the outcome.
After talking to my friends who have been wrenchin Harleys since the seventies the common answer was that aftermarket parts are only so you don't had to develop the whole thing but the last bit is all up to you.
Hmmm, was it really this bad? Of Course it was. But thats half the fun.
As the quote goes "If It Was Easy Everyone Would Do It".
*Hehe*
Meassurement begun big style.
The 130 belt was waaaay to short and almost snapped the axels when I mounted it.
Next step in belts was 132 and with this it was waaaay to long.
So after some mails to BDL the nice people sent me a new motor pulley that is .020 undersize.
The project now is to reassemble it all with the new pulley and hope for the best.

But something that halted this project was arriving of a small puppy in our family.
The new little dog had to ride the car with style so the mammoth job of making a dog cage begun.
Have been working with this cage now on and of for two months and now finally I see the end of it.
So soon the belt/pulley problem solving would start again.