CVT Full Suspension CVT

Nah, we won't boot you for building a .......moped. :D Some of us have one too. Sides, it's automatic....still fits the description.

Couple questions......I'm curious about your muffler. Always interested in the quest for quiet. Also, where did you get your CVT. I have an idea kicking around for a full suspension stretch, and looking for an alternative to a Nu Vinci. I used to have a scooter site that carried them, but they don't anymore.

Nice job by the way......I like it.

The only dealer, that I could find, that had CVT's in stock was Fancy Scooter. Others still list them but are showing out of stock but that was several months ago. The straight through glass pack is a simple design, used on many motorcycles. It was louder than I wanted, so I made a spiral baffle from 1/8" thick flat aluminum. It will create a little back pressure, because it is inside the core tube but it doesn't create any change in direction for the exhaust gas. It did lean out the engine somewhat but a couple of carb adjustments took care of that.

The scooter muffler I bought, has a 3" outside diameter so 3" exhaust pipe can be used to extend the housing. A piece of 3/4" tubing, fit tightly inside the muffler exhaust pipe, so after drilling about 150 holes in it and welding on a 3" end plate, I had a core tube.

I created a little stir in the community yesterday evening by riding the bike up the very steep hill in front of my house. A hill I never got up before. Several neighbors wanted to know where they could get one, hummmm!!!
 
My 11 tooth sprocket is installed on the CVT and I've run it with both the 72 tooth and the 63 tooth. I have also confirmed my calculations on the high speed ratio of the CVT at 2.875:1. The 72 tooth gives me the gearing of my old Staton single speed box but I think I like the 63 tooth. The higher ratio will actually slow the bike on top end because over gearing won't allow the engine to gain full RPM but it will cruse at 35 MPH. I still have more riding to do before I make a final decision but I'm getting closer. My pedals have cob webs on them, maybe I should keep the engine off for a while because my pants are getting tight around the middle.
 
Took a good hilly ride this morning and have decided to go with the 11/72 - 18.82:1 final drive ratio. Gotta let my beast breathe, a little higher cruise RPM but I want the added performance.
 
I think that's a good call, kerf. Everything I've seen says that you need to gear the system to allow the motor to hit full RPM, else you end up always running in 'reduction' mode in the CVT, which is harder on the belt.
 
Just got back from a test ride. Mm, mm, mm. how sweet it is!!!!!!!

On the negative side, 7:00 AM I took my new RC plane to the open field outside the baseball diamond. Things were look'n good, when I looked to see where I walk'n and flew the $#*& thing into the scoreboard. Hit hard enough to rip both wings off. Glad I ordered more wings and horizontal stabs on Friday.

Win some, lose some.
 
Well, it looks like kerf is finished, maybe for good. The outside plate on the variator has cracked where the shaft goes through. It doesn't appear to have the beef to handle the load. I MIG welded the crack but but another appeared on the other side. Unless someone has an idea, I may be through with the whole MB concept altogether.
 
My CVT Parts

See if this helps.
 

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