New Build, 5 sp Chopper @ over 40+ mph

hey ive got a occ chopper (its one of the ones on the grubee website made for motorizing) with a 70cc HT how hard was it to fit the SBP expansion chamber? and I dont think that I could use the shift kit because my bike doesn't have gears for one and 2 if I could find a occ wheel that had gears I dont think that any in australia came out with gears.
 
jlebh1 Chopper Work

To bad I don't have a first name, it's always nice to address a real person. Don't panic, all can be done. First of all, not being at all familiar with bicycles, I don't know the difference between my first issue OCC Chopper and one from this 'Grubee' guy. First thing, you need 'good' brakes, that means 'disc brakes' if possible, which I couldn't put on the front wheel of my OCC. The original rear brake on my OCC fell apart on second stop. Kind of hard stopping @ 25 mph by dragging your feet, enough said. Now, as far as installing the exhaust chamber, there is some welding required. As the enclosed pictures show The cutting and welding that's required is dictated by your motor placement, and how you want the chamber placed. As the picture shows, I like an 'up swept' look, and I think that the dimensions of the chamber fit my frame almost perfect (my opinion). Its just a cut and fit procedure. I also think it sounds great (not to loud). I got kind of picky on motor placement because I didn't like the looks of the motor being way up high, or to low so I modified the mount I received from the vendor to place the motor right in the middle of the frame. You can use the shifter kit from SBP quite successfully, although I had to extend the counter shaft so that the drive sprocket could line up with the placement of the driven chain ring. To complete the drive system, what you want is a 5sp gear w/freewheel (e-bay) and a axle mount derailleur. If you serious about going this direction, let me know and I'll dismantle my drive line and picture piece by piece the procedure......Byron
 

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those occ bikes look like a pain to put a motor on, but once it's on, it does look AMAZING
 
chopper pics

hi again my name is Jake by the way, here are some pics of my chopper. You know how on your mount you bolt that onto the frame (I think) with mine from the grubee factory those 2 posts that you just have a plate with them on on mine they are welded on to the frame, and mine comes with a different hub so that the sprocket bolts on to the hub not on to the spokes.

sorry about the mud in the pictures its been raining here well a couple of weeks ago but havnt got around to cleaning it too many other bikes as well as this one though this is my daily transport to and from work so this one is my priority, and I know the muffler is off its so you can see the mounting properly

also thanks for the offer but dont take apart your bike yet there is a place here in australia that can custom make just about anything I want for my bike but ill PM you if I need those pics

thanks

oh ye my bike also came with front disc brakes and just normal rear
 

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Chopper Build

Hi Jake:
Now I'm really jealous, a few weeks ago I'd given anything for your front disc brake. I'd really would like to know what the difference is between your Chopper and mine. The front wheel on mine has such a shallow disc that there is no room to mount a brake disc, and still allow the caliper will fit between the spokes and the forks. I think that the adaption of the tuned pipe will really transform the appearance of your bike. Have you done any porting. Doing some porting, along with the tuned pipe, will really make it sing. I notice your high bars. I've been toying with the idea of doing that, but first I need to raise the seat peg, as I'm a little long legged for this 24" machine. I might sell this exercise, and do the same thing to a larger bike that would be more comfortable. I'd be interested in seeing what you come up with......Byron
 
Can't, Shouldn't, Not Possible, Wouldn't do it.

those occ bikes look like a pain to put a motor on, but once it's on, it does look AMAZING

These are the reasons that set me off building this machine, and I ended up with a motor bike that's a total blast to ride, almost as much fun as my 20 hp Cushman 740.....Byron
 
ill take some close up pics of the front and rock solid motors here in australia is giving me a good deal on a ported and polished engine with balanced crank (means very little to no vibration) deltoro carb, clutch acuator, performance cdi and billet engine covers. so I can put the engine on iit now on one of my other old bikes and sell it and make a bit of profit along the way. by the way rock solid motors is the same stuff manic mechanic sells - http://home.roadrunner.com/~bikeparts/

(and this is only there baby HP engine:)
 
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sweet looking bike, byron! great job on documenting the build with pictures. it will surely help others in the long run. as stated earlier, you're in uncharted territory with this bike. keep up the good work and happy riding!
- chol
 
video?

i really like ur bike byron but money and time wont let me doing something like urs. but i was wondering if u can make a vid of how ur drivetrain works.
 
Another OCC

Hey Byron..ENO (Down Under) Sorry I missed your first post..Great build and you obviously know your mechanics..My son and i have recently finished a Stingray,,Yeah they are a difficult build but well worth it..Jakes bike is a clean build (with attached mud stickers)..Ours (or my sons) is constantly evolving as his imagination gets bigger every day. Thought I would post some pics to add to the collection of Stingay ideas..will keep watching this thread for more ideas..see ya ENO (Oz)...(PS..The skull is temporary..I hope..but you never know.)
 

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