212 build

With the jackshaft pictured above mounted on a bicycle, you would still need an additional jaclshaft for proper chain alignment, just like a CVT. The only other way to use it is to off-set the engine an inch or two to the right in the frame. Just a little heads up. With the AGK jackshaft, this problem is eliminated by it's design. There is a diff.

dnut
 
Ibedayank said:
look at the last pic I posted then at the cvt backing plate you posted
the jackshaft plate is slooted because there is a chain from the clutch to the shaft that makes up the jackshft in that system now explain to me how a cvt backing plate can adjust the tension of the first chain!!!!!


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like so...
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You are correct, slotted for chain adjustment.

The CVT plate I pictured is the exact plate for the Comet Torq-Verter. It should work with a chain tensioner.
 
You really don't need a chain tensioner on the primary chain.....it's not going anywhere. Just add a half-link if it gets to sloppy.

dnut
 
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scotto, could you please pm me with some recommendations and advice for a relatively inexpensive transmission for the 99cc predator, I am not too concerned with top speed. I am looking for reliability, a wide range of performance with focus on climb, and I will be running a 44t rear. looking for a ratio around 9:1 for climb. just go ahead and pm me. thanks.
 
How's the 212 running in your bike? A lot of people are watching, as yours is the only 212 build I've seen on an aluminum bike.

How's your gearing working out for you?
 
5-7HEAVEN said:
How's the 212 running in your bike? A lot of people are watching, as yours is the only 212 build I've seen on an aluminum bike.

How's your gearing working out for you?
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Flexman put one on his Felt Slater which is also aluminum framed.

dnut
 
I was going to put my 212cc hf engine on a workman.but it to small for that frame, so iam going to put it in a Electra retro runner.i hope I can do some.wee..wee.
 
I'm running a Briggs 3.5 hp,9 c.i. or 147cc. with a DIY jaxkshaft setup. 2 good pillow blocks-27.00 ea. 12" of shaft 8.00, max torque clutch-42.00, 2 gears for shaft-12.00 ea, 10' #35 chain-20.00. 4' #415 chain 15.00 . $129 is sounding pretty good now huh?
 
Getting ready to start finishing the build, I bought a chrome 1 gal. tank. I painted it dark candy red over the chrome. The chrome was very rough so I made it very dark. I'm painting the rest of the bike about the same with some black or silver accents.
 

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candy over chrome !!!
looks great (^)

back when I was still driving, my tow-truck was candy red over silver ;)
over chrome is way sweeter :)
 
azbill said:
candy over chrome !!!
looks great (^)

back when I was still driving, my tow-truck was candy red over silver ;)
over chrome is way sweeter :)
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That had to be a sweet tow truck. I have a passion for candy red. My last paint on my bike was that. (I change it often.)
 

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Been working out details and bugs on bike. My first chain to jack shaft was too loose and I didn't plan for an adjustment. Tried to add a roller bearing tension er, but was always noisy on deceleration. Changing the driven sprocket from 10 to 9 teeth and using 1/2 link will work when links get here.
Using a headlight with an hid set-up, 35 watts vs. 55 watts for regular. Gonna try running a wheel driven generator to keep the battery charged with lights on.
 
Haven't been back in awhile. It rained every day here for about a month.Changed sprockets to 10:9 14:48. Still takes off ok, takes a little longer to wind out, about a block & a half, over 40 mph gps with the governor hooked up. cruises 30-40 comfortably. Hooked up an hid headlight and a big led tailight from a truck. Battery box on bars right now. want to use a wheel generator to keep battery up.
No pics yet. painted my fenders and working on gas tank. Need to weld in a plate for the chain tensioner and the kickstand lengthened.
Still working on it.
 
Old motorbike I would like to know where did u get that gps mount. One more thing that bike is good & tough.what are you runnin on your clutch? from the clutch to your jackstaft . What I mean is what spockets are you using on your jackstaft and chain size . Iam going to use some of my letover parts from my other builts:-||
 
ssmario1 said:
Old motorbike I would like to know where did u get that gps mount. One more thing that bike is good & tough.what are you runnin on your clutch? from the clutch to your jackstaft . What I mean is what spockets are you using on your jackstaft and chain size . Iam going to use some of my letover parts from my other builts:-||
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Right now the gps is velcroed to the bars and tie strapped. was velcroed to the tank.
Using #40 chain from 10 tooth to a 9 tooth on jackshaft (was 10). Then a 14 to 48 on wheel.
Ratio is a little high, but just what I want to cruise at low rpms.
Good success with your build.
 

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