I'll be starting a 185 project soon. Anyone got the gearbox ratio's?.
Heres what I gave Pokey for the early 185, but the ER still uses the same output shaft and the input shaft is only shorter on the clutch hub end so all gears will fit.
Hey pokey, heres a breakdown of my TS/TM185 project gearbox
(YES!! you inspired it )
RM125S straight-cut primary and basket 18t-61t (19t-61t stock185)
stock 185 input and output shafts
with 1st drive (14t stock shaft)
2nd drive (17t from tm/rm125 (16t stock185))
3rd drive (20t stock 185)
4th drive (22t from tm/rm125 (23t stock185))
5th drive (25t stock 185)
1st driven (30t from tm/rm125(33t stock 185))
2nd driven (27t from tm/rm125(29t stock 185))
3rd driven (25t stock 185)
4th driven (23t stock 185)
5th driven (21t from tm/rm125(20t stock 185))
This is what is going into my bottom end as the RM basket gets 2 extra plates and still fits inside the clutch cover, which is a 1976
type that looks the same as the TM ones. The engine is going into a TM 125 chassis that I picked up at the swapmeet this year
I have good o.e.m forks, tank, seat, wheels and a RM125S ignition to go in it, I'll make my own pipe and only mildly port the cylinder. I will also shave a few mm of the bottom of the piston skirt to increase the intake port timing (you have to take 5mm of the bottom of ts125 pistons to use them in TM125's) so I will start small and work my way up from there. I'll post some pics when I have more than a pile of bits to take pictures of.
I intend my TS/TM to look as close to stock as possible in the hope no one will notice