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Message started by baker87 on 04/24/12 at 16:37:45

Title: oil pressure
Post by baker87 on 04/24/12 at 16:37:45

i have 25 psi oil pressure at first start up.... then after a min or 2.5 my oil pressure starts jumping from 15 to 0 and it fluctuates for 3 min.... then i lose oil pressure.... what could cause this? where are my weak spots for this problem? :-?

Title: Re: oil pressure
Post by Oldfeller on 04/24/12 at 17:34:32

You are measuring at the main gallery, right?

Oil pump itself is defective or the drive gear train is slipping/disconnecting.

If there was no anti-rotate pin inside the gear & the flange washer you could get something like this. As the clamp joint started to warm up some it would slip more and more and the oil pressure would decrease.

Title: Re: oil pressure
Post by baker87 on 04/24/12 at 18:16:26

Ok i will check but i dont think thats it.... i will take pics... and post them....

Title: Re: oil pressure
Post by verslagen1 on 04/24/12 at 18:33:03

I would check the oil pump gear as OF said.

but also, pressure will be high when cold... and 25 is high cause the main release of pressure is the clearances between the cam and journals. Tranny has a metering valve, so it won't be affected much by warming up. then there's the crank, not sure how oil is metered thru there.

typical hot idle pressure is about 5psi.

how low is your rpm? should be 10 to 12 hundred.

Title: Re: oil pressure
Post by baker87 on 04/24/12 at 18:48:26

I tuned by ear so the oil pump would whine then raise the rpm about 100 to 300 rpms.... i figure guessing it should be around 1150 to 1300.... i have run 8 quarts of oil through and my oil is still dark but it is getting transparent little by little.... my bike runs awesome far more power than it has ever had...

Title: Re: oil pressure
Post by Oldfeller on 04/24/12 at 18:52:46

then after a min or 2.5 my oil pressure starts jumping from 15 to 0 and it fluctuates for 3 min.... then i lose oil pressure

I dunno -- normal fluxuation down with oil viscosity warm up would be normal enough but not 15 down to zero then back up again and down again and up again -- then going to NOTHING after 3 minutes ....

Could it be his metering gage isn't up to the task? Didn't he say he was using a compression tester?

Title: Re: oil pressure
Post by verslagen1 on 04/24/12 at 19:21:21

OF? you ever hear an oil pump whine?

Title: Re: oil pressure
Post by justin_o_guy2 on 04/24/12 at 19:31:00

Has anyone had th clutch off it?

Title: Re: oil pressure
Post by Oldfeller on 04/24/12 at 19:40:39

Oh, the entire clutch basket is what you mean -- he must be taking the basket out of the way then taking the oil pump gear off of it and driving the bare shaft from the clutch basket area of the right side.

Or something .... ????? what exactly, I dunno what ?????

Or else we are both just old and dumb --- Justin, I told you we'd catch up with Bill eventually.

I just never thought it would be so durn soon.

Title: Re: oil pressure
Post by verslagen1 on 04/24/12 at 19:56:19

637C7A7D60675666566E7C703B090 wrote:

Has anyone had th clutch off it?

Shirley, you jest. many have had it off, some many times.

Title: Re: oil pressure
Post by Oldfeller on 04/24/12 at 20:14:36

I keeps a tell ya -- don't call me Shirley !!

That's me baby sister !!!

Title: Re: oil pressure
Post by justin_o_guy2 on 04/24/12 at 20:19:33

Or else we are both just old and dumb --- Justin, I told you we'd catch up with Bill eventually.

Ive had a bad enough day,, I really dont need that thot in my head,,

Eaux Neaux! I think I hear a Klotz commercial running in my head,,

Title: Re: oil pressure
Post by baker87 on 04/24/12 at 20:21:40

46595F5845427343734B59551E2C0 wrote:

Has anyone had th clutch off it?

yep i have had the clutch basket off.... and OF yes i was running the oil pump the gear off... and VERS it sounds like a pulsing oil pump.... not sure how to describe it other than a pulsating whine.... i can take the rocker arm covers off and drop the rpms and have no oil spraying out but hear this sound... i have heard it several times when i have had idle too low

Title: Re: oil pressure
Post by justin_o_guy2 on 04/24/12 at 20:42:39

& how are you keeping enough oil in the sump with the side cover off?

Title: Re: oil pressure
Post by baker87 on 04/24/12 at 20:49:34

Now im running it fully assembled.... it might be a seal or gasket... trying to find a guage that will read 50 psi.... my 200 psi guage is too strong for my bike and not accurate enough for me...

Title: Re: oil pressure
Post by thumperclone on 04/24/12 at 21:34:28

oil pressure specs:
oil temp. @ 140f
above 7.1 psi
below 10.7 psi
at 3000 rpm