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08-14-2007 #1Zomby Builder Guest
Zomby Zack an old school chopper from scratch
This project started with two donar bikes. A tandem, and an old beach cruiser I picked up in Pacific Beach. The tandem had a nice rear wheel with a big drum brake. I had the hub relaced into a 24 inch aluminum wheel, with a 3 inch wide Fatti O tire. Thanks to Sam at Hidden Valley bicycles in Escondido CA
Next I built the rear end using the tandem tubing & drop outs. This needed to be widened for the wide tire & chain clearance. I chopped the beach cruiser completely in half at the seat post. After eliminating the seat post there was a lot of room for the motor, and by rocking it back increased the rake for the front end. I welded another bottom bracket into the frame to house the internal jackshaft and used the weld on supports that came with the go cart jackshaft kit to support the other end of the axle.
Next I mounted the motor, a 49cc Chinese MOON (Mitsubishi Clone) 2 stroke with a CVT torque converter. This motor was a take off from a go ped I bought off ebay new for $199.00. I mocked up the rest of the bike & test drove it to make sure it worked.
I dis assembled the bike to the frame & had it powder coated gloss black. $110.00 at North County Powder coating in San Marcos CA.
Ready for re assembly. I mounted the rear wheel to center & allign with the drive sprocket. Then the jackshaft was assembled
Last edited by Zomby Builder; 08-14-2007 at 10:55 PM.
08-14-2007 #2Zomby Builder Guest
Zomby Zack continued
This may take 4 posts to complete.
Jack shaft assembly
Freewheel adapter two sprockets
Freewheel adapter 1 sprocket
European 3 piece crank adapter for bottom brackets to house jackshaft bearings
Rolling Chasis [ATTACH]490[/ATTACH]
08-14-2007 #4go you good thing Guest
Excellent. The detail you have posted is great
Sweet looking bikes also.
Very well done.
08-14-2007 #5locoWelder Guest
08-18-2007 #6Zomby Builder Guest
Zacks Crank & pedal drive
I assembled the crank & chain drive to the rear, everything lines up well so far. The crank had to be wider on the right to clear the CVT / left side stock Grubee. I fabed the Crank & kicked the sprocket over to the right to line up with the jackshaft sprocket. I made another crank similar to this one & it has worked great for over 1 year. (see ZENA)
This really dry runs smooth. I will now finish the front end, hook up brakes, tighten everything, put the seat & pedals on, test drive with only the pedal drive to make sure all is well before installing the Motor.
Last edited by Zomby Builder; 08-18-2007 at 02:46 PM.
08-18-2007 #7gone_fishin Guest
woohooo...nice post! i do believe he's got the "attach" code down proper
and...great info too...some very interesting theory happening here...thanks!! 8)
09-03-2007 #8Zomby Builder Guest
Zomby Zax Lives
Pedaled it like a bike. OK on the beach, but way too much work for a 6% grade. Crank up the Chinese 49 & well "Holy mother of bring the dog in, Honey I'll hook the muffler up tomorrow.
Runs like a dream. I have really been eyeing that Tanaka 4 hp motor....Def on the upgrade list.
Nice clean build ya got there Zomby. I love the progress pics. The work on the tank is awesome!