Z750 Twin Forum

  Smile...
looks like you mixed up Heri's and my suggestions...

I am absolutely unfamiliar with all these pressure things - that is surely more Heri's domain.

I'm just curious...

Bye

Carsten

Ok, one answer is still missing:

The visible lower chain strand of the balancers moves aft, thus the the balancer rotates clockwise (seen from the right side) and - as it looks like a gear-wheel, not a chain sprocket - the pump wheel then runs counterclockwise again:
Hope this helps...

Bye

Carsten

Hi TJ,

I am not sure how the sprocket of the new oil pump is driven.
There is nothing stock to drive it in that position, additional changes have to be done.
The stock oil pump is just "plugged in" to the (visible part)  balancer chain and bolted down to the engine case.
Very straight forward and easy installation.
Cheers, Michael

Michael,

was meinst du mit "stock"?

C

Well, looking at both pics and how the original pump looks like (see bottom of Michael's pic), it could work, if you use the gear wheel of the original pump as driving gear for your new one. BUT THEN, ROTATION CHANGES!!

Carsten

"The stock oil pump is just "plugged in" to the (visible part)  balancer chain"

Michael,

I do not fully agree: The pump is not plugged in the balancer chain. There is a gear wheel on the aft balancer shaft to drive the pump, right?

Carsten

bikeorslk hat geschrieben:   Smile...
looks like you mixed up Heri's and my suggestions...

I am absolutely unfamiliar with all these pressure things - that is surely more Heri's domain.

I'm just curious...

Bye

Carsten

My apologies to you both ! 

I was replying on my tablet, and I do not have a full screen

TJ

Hi Carsten,

englisch: "stock" in diesem Zusammenhang heißt zu deutsch: "original".
Du kennst bestimmt die Abkürzung "NOS" (auch für Lachgas), es heißt aber auch "new old stock", also neue Originalteile, die schon lange gelagert wurden.
"stock" bezeichnet den "originalen" Werkszustand.

Carsten,
you are correct about the drive of the oil pump !
My fault, sorry.
Thank you for paying attention and to intervene.
It is time for me to rebuilt the next Twin engine

Here is a schematic about the engine lubrication system and I have marked the position where the sprocket of the oil pump goes into a sprocket on the balancer weight shaft.
Oil pump isn't directly driven by the chain ! Cheers, Michael

Gentlemen,

please remember I have only seen the same picture as you for the conversion - and until my workshop manual arrives next week - I am not familiar with the inside of the engine !! I have not been able to speak to Chris who made the conversion - so there is some guessing. 

I can imagine the new pump is driven directly from the centre of the visible drive cog - please see the next picture.

The rotation is NOT important - the Gixer pump can drive from both ends ! That is - clockwise AND counter clockwise.

I have to wait until I remove the sump from my engine in the next 2 weeks to see exactly how much space there is.

Thanx for the illustration Michael - that begins to explain the idea !

I have no problem for the drive either internal or external. 

I agree about the loads on the shaft - but the loads are very light and if I use that location I must have an oil seal. That means a special cover plate, so it makes sense to fit a bearing with a seal.

Please keep the suggestions coming ! 

Here is a rough schematic layout of the oil system.

The pump is shown externally - but the layout is the same if the oil pump is inside the crankcase. 


And now, a pal has told me he ran a turbo system on a Yamaha XS650 with the turbo oil feed from the engine pressure gauge / switch  take off !!!! He ran this for 3 years without any problems .........................