TT500 rear wheel

[cloggy]

I've just acquired [at considerable expense] a 1981 Dick Mann Mark 4 yamaha 500
 It's in sound race nick, not concours.
It has an XT rear wheel and I'd like to get a lighter TT one
Does anyone know if the two use the same spindle and sprocket, and also what the TT part number is and if this wheel was used in anything else?
cheers
Jez

[GMC]

The talk I hear is that the Cush Drive rear wheel is better for the gearbox if your running a hot motor.

As for the hub, you can find one from....

Rear Hub
Part # = 483-25311-13-98
Part Description = HUB,REAR
Model Count = 22
IT250F 1979 250 IT250 Dual-Purpose
IT250G 1980 250 IT250 Dual-Purpose
IT400C 1976 400 IT400 Dual-Purpose
IT400F 1979 400 IT400 Dual-Purpose
IT425G 1980 425 IT425 Dual-Purpose
MX250B 1975 250 MX250 Off-Road
MX400B 1975 400 MX400 Off-Road
TT500C 1976 500 TT500 Off-Road
TT500D 1977 500 TT500 Off-Road
TT500F 1979 500 TT500 Off-Road
TT500G 1980 500 TT500 Off-Road
TT500H 1981 500 TT500 Off-Road
YZ250A 1974 250 YZ250 Competition Motocross
YZ250C 1976 250 YZ250 Competition Motocross
YZ250D 1977 250 YZ250 Competition Motocross
YZ250E 1978 250 YZ250 Competition Motocross
YZ250F 1979 250 YZ250 Competition Motocross
YZ360A 1974 360 YZ360 Competition Motocross
YZ400C 1976 400 YZ400 Competition Motocross
YZ400D 1977 400 YZ400 Competition Motocross
YZ400E 1978 400 YZ400 Competition Motocross
YZ400F 1979 400 YZ400 Competition Motocross

[cloggy]

 I did wonder about that
The DR400T retained the cushdrive. This motor is good. The guy before raced it with some success and reckoned it had to have a 540 kit at the very least. I'll leave the wheel alone and buy a case saver.