Single Bush (10-020)

Student 1800 
Shaft G (Inner Shaft x2)75542
Shaft H (Gear 75745) 75540
Shaft D (Gear 75739)no ref (check bushes)

Triumph 2000 
Gearbox input shaft 54126

Master 2500
Shaft G (Inner Shaft x2)71040
Shaft H (Gear 71245)  71042
Shaft C (Gear 71247)no ref
Shaft D (Gear 71239 x2)no ref (check bushes)

3100
Shaft H (Gear 75745)75540
Shaft G (Inner Shaft x2)75542
Shaft D (Gear 75739 x2)no ref (check bushes)