Hi
have not got on the forum`s much, for months. Was surprised to see this old thread come back to life. It is a reminder of how fast time pass`s = 2009!
The top frame tube mount use`s a small 5:1 mini chopper gear box. It will reverse the gear rotation, thus mount on left side.
Had a sbp shifter kit for a china girl that i never used. Took parts from it for the build. Used 1/2 pitch bmx bike chain from the motor to the pedal crank.
If were to do it again, would use 8mm chain and sprockets from the motor to the pedal`s. That would make it much easier to get the proper gear ratio. Had to use a 24 or 30 tooth on the bottom bracket to power the rear wheel for start out power, can`t remember which. Also have a 34 tooth on rear wheel cassette.
Have not installed the cassette with a 38 tooth large cog. But that would be excellent for the woods etc. Am over 250 lbs, so need the gears.
This build is my favorite of all my builds. The gears are fun and have been trouble free. Am thinking a 7 speed rear cassette alows the strongest chain.
If a stronger chain could be run on a 5 speed rear cassette that would be even better. The titan 4 stroke has surprising torque thru the gears.
The forum would not let me post pic`s that have been previously attached in the forum. Will try again, there are several pics of my mount etc in other threads.
The high pressure tubing clamps are just perfect for this type of build. Easy to adjust chain and don`t damage the frame. They could be used on the china girl motors, the threaded part could be welded to in frame build motor plate. McMaster Carr sells the mounts for less than $4. ea., many sizes, and pipe and tube size`s which are different. Pipe is id, tube is od.
Ron .