I'm 99% sure that clutching & gearing stays the same from the 153 to the 162, it only changes when you go to the 141 (crossfire).
Pretty much everything else is the same, even with a different leverage ratio on the rear stock, I'm pretty sure the valving is the same as well.
Pretty much everything else is the same, even with a different leverage ratio on the rear stock, I'm pretty sure the valving is the same as well.