MZ TS 150 front sprocket

[ronwright26]

I am currently in the process of building a TS 150 for trail riding. The front engine sprocket is 16 and I am aware that I can gear down by fitting the TS 125 front sprocket which is 15 teeth. However in the back of mind I seem to recollect that certain sprockets from the early Hondas are the same [CG 125?] and just need the addition of a small spacer to get the correct run. Can anyone help ?
Trying to up the rear sproicket is likely to be problematical but if anyone has any ideas I would like to here of them.
The TS is to be radically altered and its main purpose is to use it in the Beamish Trophy Trial.

[Blurredman]

I have also heard that CG125 sprockets work (and they go down to 13) but the main issue after that is chain clearance through the entrance holes on the engine. Anything less than 16 might mean you need to cut the hole larger ?

The CG sprockets certainly use the same mating gears between the shaft and the sprocket, so yes, Maybe you might only need a spacer. However I also recall the CG's (and other Hondas mind) had a braket holder to keep in place on the shaft, I think you could also use the bracket, but that would also mean modifying the shaft to implement the brakcet:



(taken from a diff forum)

[DAVID THOMPSON]

changes of size are best done on the bigger sprocket
making the front smaller makes it ware faster and some times can stress the bearing or the case

Dave