Hey guys i had a bit of a problem with my Boy last week it only seem to happen on real cold mornings, doing around the 100k speed, It was hesatating as if i was backing off but i wasnt so i pulled over gave it a few revs and away i went next cold morning same thing and so on and so on.. So i changed the plugs and points and filters and done the timing gave it a service next cold morning same thing, checked all electricals everything looked ok so i went to the fuel and there it was right in front of me the vacum solanoid for the secondry wasnt kicking in so i pulled it off and noticed a split in the rubber plunger so a trip to the wreckers pulled one of a sigma ( apparently there the same ) and $30 later all seems to be going fine. touch wood Just thought ild share that incase anyone else experiances the same problem.
Rod....
The secondary vacuum diaphragm is one of the most common sources of power-loss encountered by MightyBoy owners. The very first thing Brayden told me to keep an eye out for when I met him. But thank you for taking the time to draw it to our attention!