Replacing the whole pump would be ideal, if not both, or one SET of rotors replaced would be your sugestion? Any thoughts on the shaft? Thanks opt

 

If you have any doubts about the pump rotors along with the shaft,just replace the pump.Split the cost with your dad if he won't go for the full amount.If you've tracked the problem down to the pump,better than doing it half way especially since you have the complete thing torn down.

 

Alrighty, got the pump, head bolts, wiseco 93mm all on order. Now comes the part where I track packages a few times every hour for the next week or two. Thanks for the advise, having someone's professional opinion helps to rationalize replacing some of these parts.

 

Got some of the parts the other day, still waiting on two of my head bolts tho! talk about frustrating. Partzilla doesn't seem to have their stuff in order right now.
anyways, question for you. The new oil pump just has a plastic sheet with holes drilled through instead of the metal screen and cover plate with inch hole in the center on the original pump. cost cutting and thats why its plastic now? thinking about using the old metal screen on the new pump... thoughts?

 

Doesn't matter as it just strain the oil. If you want the metal screen and it fits,use it.

 

The old screen has smaller openings, any downfall to the smaller hole for oil flow?

 

More force on scavenging oil with the metal plate because of the smaller opening,but shavings may not be evenly distributed over the metal screen area.May clump in one area as I found them before. Just my the plastic screen upgrade may be a better choice overall.It may not just be a cheaper replacement for the metal screen. Again the choice is yours as for the most part the pump and metal screen served the purpose for years and we didn't have very many pump issues except on abused/neglected engines.

 

Alrighty thanks again opt, will use the new setup then. Just trying to find a 1mm oil pump shim so I can get her together this weekend!

 

Well, the old popo went together today. Did the crankcase last night and finnaly got my last two head bolts from partzilla this morning and got cranking! Lots of grease went on the new camshaft and i checked that oil was pumping up to the head and down by the cam chain, then I fired her up. Ran great and after 2.5 hours my oil level is the same and really clean

exhaust squeaks a little when I turn right....springs? Hmmm
my temp gauge fluctuates for some reason. Only thought is some stator connection the gauge it changes with rpms and if I have lights on.

Besides that, so relieved to have the ole girl back. Here's a few pics of the popo and is cousin Bumblebee. I love my kids 😋