The Ultimate Concept - Balanced CVT Rackmount

I finished the ultimate concept in a motorized bicycle, a balanced cvt and four stroke engine, which provides smooth accleration and power at all speeds. When riding, the bike has a very light, balanced feeling; you don't even know it has a motor. Performance with a real transmission makes the bike into a moped, and far outpasses the performance of slip clutches. Note both the bicycle sprocket and the cvt drive sprocket are on the same side, the right side. Please refer to Treewk's comments on this site for info on the double-right sided drive, which is his idea. Once you feel the power and smoothness of a CVT, you never go back. This is a cool 24 inch steel frame bike using 11T/63T sprockets, top speed 25 mph. Got my carb adjusted a little better. This thing really has acceleration pop. Mike S

Mike

Congrats, your mab looks super. The open view of your drive chain is nice for checking chain alignment. May need to plastic wire tie a little plastic cover over top sprocket if you oil your chain, chain saw bar oil works good for me.

Glad was able to help you with the pm`s. Thanks for the kind words.

Ron

Looks good. I am not quite sure how the sprocket is mounted, but it looks like you used a multispeed freewheel hub, with a single speed freewheel and some kind of lockring or spacers to trap the cog.

You must post more details. Many will want to mimic your concept.

I want to know where you got that transmission!!!

tranny from pocketbikeparts or fancyscooters

Happycs and members

Back around 3-3-2009 when I came up with the double right hand free wheel concept, posted the info in "CVT`s and Comet drive lines" thread.

Starting at post #54 thru approx post #80. It references post`s in the brother forum also.

Hope this helps. Nuttsy came up with the CVT build before me with a left side drive. Did not know about his until after mine was done. He is a valued friend now.

Ron

Here is the thing made by TreeWK. http://motoredbikes.com/showpost.php?p=212722&postcount=65 You should get a sticky for that.

One More Pic

This pic shows how compact the power system is:

Meh... I bought "the ultimate concept" when I first came to this site 3 years ago.

http://motoredbikes.com/showpost.php?p=322210&postcount=5

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Folding 20" bike w/ 5:1 reverse gearbox rack-mounted to a dual freewheel hub, both freewheels being on the right-hand side, connected to 12 gauge spokes or thicker.


My engine freewheel looks just like the others in this thread. In order to get it off, I had to grind it off. I'm thinking of putting a shim plate on the inner side of the engine freewheel this time, so that it should be far easier to remove if needed.

Also, if you ever need to replace your engine freewheel for whatever reason, that larger sprocket (44t) will slide right on a regular 16t freewheel, and those 4 bolt holes will line up perfectly with the spokes of the regular freewheel. 16 / 4 = 4 perfect holes for those bolts to go thru.

Very, very awesome design, indeed.

I could have gotten the Grubee dual freewheel hub, but the engine freewheel is on the left-hand side!!! That doesn't allow me to use the SUPER compact 5:1 reverse gearbox, however... which is a huge bummer. Also, flipping the engine around would put the intake in the rear of the bike.

I feel like this configuration adds an extra mph or two w/ the intake being in the front and the exhaust being in the back... like the Honda K-series motors.

Love it, love it, love it.

Too bad somebody doesn't have a bunch of these wheels pre-made for 20", 24", 26", etc. bikes.

Design a wheel around this hub, with 10 gauge spokes, with a double-wall rim, etc... and then nearly all the pains of motorized bicycles will go away.

Seriously... if someone could make a solid steel wheel with this hub... in pre-made configurations... they would each be worth a few hundred $$$ in my opinion.

Just add tube, tires, bike, & engine/gearbox combo (that gearbox can be had for $20 or so).... and all of a sudden I see motorized bicycles as a reality for the masses.

Don't understand the benefit of CVT if we both reach the same top speed. I can carry this thing up 3 flights of stairs if need be.

THE HANDLE on my folding bike made this bike the ultimate configuration, as well, but it fell off after carrying it up so much. The aluminum was too thin at one part and cracked. But that flat plate w/ handle was something else. Still a handle on the frame for me to carry it up, but the one on the engine plate was soooo convenient.

What an awesome bike I have.

EDIT: Take note of the engine chain tensioner, as well. Very, very simple and solid.