what does pri mean

[Don Smith]

Folks I'm trying to determine if my A2 needs new rings. I measured a cold compression pressure of 90-100 psi, with the KACR connected. The 650 supplement gives a service range of 77-124 psi, status of the KACR isn't given. I don't see how 124 psi relates to the 9.5:1 compression ratio. Any advice regarding a good compression pressure reading and when to install new rings is appreciated. Any installation tips also appreciated. Thx Don, Vancouver, BC

[Kimosabe]

Thanks, I agree. I was actually trying to shorten the note by leaving out some of the mechanical variations associated with the term primer on engines that I have seen. I couldn't begin to imagine the number of varieties engineers have devised when considering all the types of internal combustions engines that have been produced. Steve In Niceville

--- In DSN_KLR650@yahoogroups.com, Mike Frey wrote: > > Steve, that's a good description. However... > > Prime on a fuel tap and Prime on a carburetor are not the same. > > Prime on the fuel tap (petcock) simply bypasses the vacuum circuit. > Flow of gas stops when the float bowl needle valve reaches its > proper level, shutting off further flow of gasoline. > > Prime on a carb dumps raw fuel ahead of the slide, serving as an > enriching device - acting as a cold start mechanism. > > A lot of Spanish bikes had primer (aka "tickler") buttons on the carbs. > My Lawn Boy mower has one. > I think my Ossa 250 had one. Some bikes had primer buttons AND > chokes. > > I guess some (but none that I know of) could have had vacuum > petcocks, primer buttons, and chokes. So, you could turn the tap > to prime, pump the primer, set the choke, and start 'er up. > > Simple, huh? No wonder a lot of people walked instead. > > Kimosabe wrote: > > >PRI is short for prime or primer. In my limited experience, these > >were more common on old morotcycles. > > > > > > > > > > >