TOPIC:

I bought a 1976 kz900 project last week and I got it cranked up today. I screwed in am oil pressure gauge and at idle it has very low oil pressure. My question is how much pressure did these motors make? I read some where that they were low pressure high volume system around 3 psi, does this sound accurate?

Three-four psi is typical. The bigger Kz's have roller bearing cranks so high pressure isn't really needed.

Later, Doug

Your right. They have low oil pressure. I redid my oil pump so when cold I get 20+ psi. It drops down to 3-5 after it warms up. I bought two Doremi low pressure gauges and blew both. Ended up buying a HD Sporster gauge that only went up to 60 psi. The regular ones don't even regester.
Steve

Thanks guys I feel a lot better about this motor now. And it makes since now I didn't realize they had roller bearings.thanks for the quick replies.

Swest what did you do to get your pump toilette pressure?

Sorry, what did you do to the pump to make more pressure?

While I was into the cases I pulled the oil pump. You had to anyway. You can do it by dropping the pan too. I had three oil pumps. One from a Z2 750. I took all the gears and measured them for play. I used the best housing and took the cover plate to a piece of glass with #600 wet/dry paper. Got all the marks out and used a thinner gasket.
That's it. I didn't expect this much pressure but it is what it is.
Steve