oil pressure

i have a 81 kz 1000 lost oil pressure need to know if the gear thats on the crank that drives the oil pump is supposed to spin on crank.it feels like its suppose to spin like its on a bearing, but i have no oil pressure and the oil pump spins free too. was running fine then just lost oil pressure.had a clutch plate blow im wondering if a piece might have gotten between the gears and stop the pump from rotating.ive called dealers and talkd on other forums nobody seems to know if that gear is suppose to spin on the crank. please help.

I think the gear on the crank is the drive gear so it has to be fixed to the crank. If it just spins, I don't think it will work.

I'm not 100% certain about that gear, but it should have some significant grunt to turn the oil pump at higher speeds.

The oil pump did not likely pick up anything and jam, as it has a fairly fine filter screen on the intake, but a piece may have jammed something else (like you suspect), and in that case, may require an overhaul.

Do you have the service manual???....

How do you know you've lost oil pressure??? Light stays on?? Check the oil pressure switch/corresponding wiring first before tearing things apart.

Or... pull pan, and turn over engine at the 17mm bolt behind ignition cover. Remove plugs . Watch pump/gears and make sure things are turning. Try gently jamming some rag between the gears to see if it stops/spins freely like you say.

Sounds like you may have busted the pin that goes in the large oil pump gear or something worse, on the crank side.

Good luck.

The gear should NOT turn independently of the crank.
It is pressed on to the crank and only turns when the crank turns.
Time for a replacement crank or a repair.

thank you .now to tear crank apart or get a new one. clutch came apart must have got in between gears an messed somethin up.

I have 2 "BRAND NEW" J model crankshafts still in kawasaki boxes if you are in need.
Barry

How much? man this motor ran good too cant believe that gear problem just went out to garage to spin it again im bummed.i just want to drill an pin at times or shoot it lol.had other projects goin, now lookin for cams, 1075 pistons 83 gpz head and of coarse a crank. i pretty much dont have a bike again was going to keep this stock,but its in pieces now, sold my z1 and now im cursed.

Brad D wrote:

How much? man this motor ran good too cant believe that gear problem just went out to garage to spin it again im bummed.i just want to drill an pin at times or shoot it lol.had other projects goin, now lookin for cams, 1075 pistons 83 gpz head and of coarse a crank. i pretty much dont have a bike again was going to keep this stock,but its in pieces now, sold my z1 and now im cursed.

Brad
email me direct at b.flood@myactv.net
Barry