5-7HEAVEN
Well-Known Member
I have a LOT of time on my hands.
Even though I still work fulltime, the pandemic has me stuck at home most of the time.
I love to shift gears.
I'd rather drive a stock 1967 VW Bug than a souped-up Corvette with automatic trans.
But HEY!
That's just me.
I also love shifting gears on a motorized bicycle.
I'm almost done my project of sending 212cc engine power through the bottom bracket(BB).
Now here's ANOTHER idea of sending power to the shift kit!
Mount the 212cc engine, with its clutch on the right side!
Get a Staton's 18.75:1 rear gearbox.
Custom mount it to the frame, below the engine.
If you want, the vendor will extend the middle shaft thru the gearbox.
That's geared at 3.75:1 AND spins CLOCKWISE!
Chain the engine's 10t clutch to the gearbox's 10t output sprocket.
Chain the 10t sprocket on the middle shaft to the 24t chainring.
Leave the engine input connection on the gearbox alone.
That gives you 5.25:1 in high gear at the rear wheel cassette.
PERFECT for high gear in a 7-speed bike.
Not TOO expensive, for a prototype.
No exotic($$$) custom work needed.
In fact, the ONLY fabrication is mounting the gearbox!
(and Staton MIGHT have the midframe mounts!)
No custom external bottom brackets, with
tiny 25mm-30mm bottom bracket bearings to deal with.
No hollow, concentric BB spindles.
No exotic humungous sprockets and custom hubs.
No TIME-CONSUMING!! sourcing all these parts on the 'net,
wondering if it'll fit AND work dependably.
No machining parts.....
Now I feel like crying.
Funny, but not so funny
Even though I still work fulltime, the pandemic has me stuck at home most of the time.
I love to shift gears.
I'd rather drive a stock 1967 VW Bug than a souped-up Corvette with automatic trans.
But HEY!
That's just me.
I also love shifting gears on a motorized bicycle.
I'm almost done my project of sending 212cc engine power through the bottom bracket(BB).
Now here's ANOTHER idea of sending power to the shift kit!
Mount the 212cc engine, with its clutch on the right side!
Get a Staton's 18.75:1 rear gearbox.
Custom mount it to the frame, below the engine.
If you want, the vendor will extend the middle shaft thru the gearbox.
That's geared at 3.75:1 AND spins CLOCKWISE!
Chain the engine's 10t clutch to the gearbox's 10t output sprocket.
Chain the 10t sprocket on the middle shaft to the 24t chainring.
Leave the engine input connection on the gearbox alone.
That gives you 5.25:1 in high gear at the rear wheel cassette.
PERFECT for high gear in a 7-speed bike.
Not TOO expensive, for a prototype.
No exotic($$$) custom work needed.
In fact, the ONLY fabrication is mounting the gearbox!
(and Staton MIGHT have the midframe mounts!)
No custom external bottom brackets, with
tiny 25mm-30mm bottom bracket bearings to deal with.
No hollow, concentric BB spindles.
No exotic humungous sprockets and custom hubs.
No TIME-CONSUMING!! sourcing all these parts on the 'net,
wondering if it'll fit AND work dependably.
No machining parts.....
Now I feel like crying.
Funny, but not so funny
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