1912 Excelsior Tribute

MotoMagz

Well-Known Member
Aug 2, 2010
1,746
929
113
Michigan
Keith, Excelsior's were chain final drive. You have a Orabona build which favored Indian which were always reduction, and final drive chain driven. The power the 212cc torque will always beat up a belt drive. I am looking forward to how this beautiful build shakes out.
Tom
My 212 is about 10hp+ You know you got power and slippage when you can throttle it and spin that belt at 35.mph I must say that my chain wearing has always been worse than my belt wear. Or at least I can see the chain/ sprocket wear more.
 

Tony01

Well-Known Member
Nov 28, 2012
1,386
819
113
sf bay area
Guys I’m trying to make a system for a 212 with a belt primary. I really believe in it. I have had too much trouble with chains wearing very fast on the primary. And I’ve tried everything. 420, 35, big and small sprockets. It pretty much just goes bad quick.
 

curtisfox

Well-Known Member
Dec 29, 2008
5,138
1,559
113
minesota
Tony do a study on lawn tractors, my old White use to do wheelie's when you let the clutch out in 3 gear, but of cores they were low geared. But even the blade clutch was strong, even when i hit stump it would bend shafts, LOL. The deck had timed blades with toothed belt, and they would fail, stopped the engine. The bigger the clutch pulley the better............Curt ( made brush hog type breakaway blades, no more damage )
 

indian22

Well-Known Member
Dec 31, 2014
3,824
4,550
113
Oklahoma
Sounds a fine project Tony & here's wishing you success.

The small cassette cog on pedal road bikes are typically worn out with only a few hundred miles on them while the larger cogs have plenty of life left. With meticulous setup and maintenance one might double that yet still the small cog wears quicker with equal use. I've not been a fan of motor driven shifter kits gas or electric. I've seen really nice builds that use them and run well...when they're running on a derail system with daily use maintenance will mount, going through a high quality hub shifter is a different story especially with a quality belt drive. The skinny bike chains are quite easy to break without a motor even when perfectly setup.

The differential hubs are a real step up but are so very expensive. With a great belt they are the berries!

Old guys don't typically put enough pressure on the pedal side motor drive train to pop it, but it still happens especially when one doesn't understand the concept of cross chaining the drive line.

Happy trails. I rather like the idea of primary belt drive and hope Tony figures it out on his 212.

Rick C.
 

Tom from Rubicon

Well-Known Member
Apr 4, 2016
1,135
2,084
113
Rubicon, Wisconsin
I wonder if a thread pertaining to drive trains of advanced builds is needed with verifiable engineering data would be useful? Chain drives are very old school at the industrial level and obviously engineers of the early twentieth century used knew what worked and didn't empirically. Certainly metallurgy has been refined to it's present state by WII. with the posible exception of PCM.
The hybrid drives of late are just that.
One of these what ever edition will keep you on know ground.
Tom
 

MotoMagz

Well-Known Member
Aug 2, 2010
1,746
929
113
Michigan
So I have a bunch of ax belts with ax75 being the largest . Well not large enough need a ax77. My tensioner is going to have to sit in the same area as most 2 stroke idlers . Is this ok on a belt drive? I know I want a pulley under belt with pressure going upward close to front pulley but ...I’m sliding back toward rear sheave.?
 

MotoMagz

Well-Known Member
Aug 2, 2010
1,746
929
113
Michigan
I have a nice tensioner but it’s not compatible with this set up. So ended up using a garage door pull cord bracket. Need to attach to bolt on motor mount and trim off some of the length of the top but it’s gong to work! 3rd picture just didn’t cut it! Lol
 

Attachments

indian22

Well-Known Member
Dec 31, 2014
3,824
4,550
113
Oklahoma
Too funny! Duct tape. broom stick & bailing wire are a country boys go to solutions...

The belt tensioner photos lead me to believe you've found the solution & it's non-intrusive to the vintage look and many bolt on tensioners are not.

Rick C.
 
Last edited: