Continuation of Disassembly and Reassembly of Non Electrical Components
Serial Number
The Serial Number is printed on a label underneath the frame's battery box support bracket.
Remove Sprockets
The rear wheel motor sprocket uses #25 chain. A #25 sprocket remover / chain whip is a rather specialized tool.
An improvised sprocket remover can be made using a pair of vise grips and a scrap length of #25 chain.
The rear wheel motor sprocket has left hand (LH) threads, turn clockwise to loosen and remove the rear wheel motor sprocket.
Clearer photo of improvised #25 sprocket remover.
The rear wheel pedal sprocket (freewheel) uses 1/2" x 1/8" (#410) bicycle chain.
BMX and cruiser bicycles typically use #410 chain.
The rear freewheel is a BMX type of single speed freewheel.
It has 16 teeth (16T) and thread size is 1.375" x 24 tpi.
It may be removed using a four notch freewheel removal tool,
for example a Park Tools FR-6 freewheel remover.
Photo of rear wheel with tools and sprockets removed
Replace Rear Pedal Sprocket
To make it easier to pedal, the stock 16T freewheel is replaced with 20T DNP freewheel.
It will probably be necessary to change the length of the #410 chain as a result.
Note: a Sturmey-Archer freewheel might be a better choice than the DNP, time will tell…
View attachment 15
Make Custom Rim Strip
It is difficult finding a rubber rim strip for a 16”wide profile rim.
A new rim strip can be made by cutting a larger rim strip and splicing it to size.
Rubber cement is used to splice the ends together.
Overlap the ends by approximately 2.5”.
Photo of custom size rim strip, splice is circled in red.
Replace Tires
The stock tires are in okay condition but will probably soon start to dry rot.
As preventative maintenance, the front Innova 18 x 2.25 (57 - 355) tire replaced with a new Innova 18 x 1.95 (54 – 355) tire.
This tire is a better fit on the front 31mm wide rim.
The rear Innova 16 x 2.25 (58 - 305) tire is replace with a CIND 16 x 2.4 (64 – 305) tire.
This tire is a little on the wide side, but okay on the 39mm wide rim.
View attachment 9
Install Tire Liners
It is more difficult to repair a rear flat tire than a front flat tire.
This is because it is necessary to readjust the chain tension after reinstalling rear wheel.
For this reason throne proof inner and tubes and Stop Flats 2 bicycle tire liner are used for the new rear tires.
Partially inflating the tube makes it easier to install Stop Flats 2 tire liner.
Replace Fake Shock Boots
The fake front shock boots had dry rotted.
Pro Comp 11127 (14901 02049) will work as a replacement but do need to be cut to fit.
Replace Brake Cables
Jagwire Mountain Pro Brake Cable Kit ( black/carbon color) is used to replace brake linkage.
An angle grinder / cutoff wheel with painters tape around the brake cable is one way to cut brake cable without much fraying.
Or something like the Park Tool CN-10 Cable and Housing Cutter might be a better choice.
Reassembled Wheels, Brakes and Crankshaft
Photo showing reassembled wheels, brakes, and crankshaft