Yokomo MR-4BC/B-Max 4 spur modification.

[Dingbat]

Lately I have been having problems sourcing spares for the old yoko MR-4 BC,
namely spur gears to fit the slipper clutch.
Anyhow one day I bought a B-max 4 spur gear just to see the difference.

It turned out the spur is near identical bar the hole size through the center.
The B-max has a larger hole through it. 13MM diameter to be exact.
Whereas the MR-4BC spur fits on the 10mm diameter slipper shaft.

B-max parts are readily available,so I decided to make a simple adapter.
See pic's.

No1,after turning some alluminium stock down to 13MM diameter,
and drilling a 10MM diameter hole through I set up the dremmel to
cut off the adapter ring.
(My little lathe Is not very good and parting off is a definite no/no
hence dremmeling)







No2 The modified B-max spur.




No3 Installed spur and slipper pads.







No4 Ready for installation.







Hopefully someone somewhere will find this of some use.
Db.