evening all . dont know if someone has already posted this. my 92 crm was having power valve problems and tried to source a new pontentiometer as this was the problem . couldnt get one exactly the same but found a complete powervalve servo unit from a 92 cr 250 . its exactly the same internaly but the casings are slightly different . i transplanted everything across into my black plastic PV unit and happy days . powervalve works a treat . after reading so many posts regarding PV servo probs and no posts about this fix i thought i would share .