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Author Topic: Billet CNC Oil Pump Rotors (Now in stock!)  (Read 1350 times)

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Offline MessnerMoto

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Billet CNC Oil Pump Rotors (Now in stock!)
« on: July 09, 2018, 12:05:26 pm »
Now in stock! Price is 120EU for complete set! Shipping is 8EU.

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Subject speaks for itself... I will post this in Hi-Po part of the forum first. Before general public gets familiar.

They will be available in 10 days. First run of 50 sets is in production

Material is 4732 steel... Already at around 30 RC of hardness. Superior to original sintered rotors.

And tolerance between rotor tips is going to be less then 0.1mm. Better then original OEM pump.

This will get your oil pump to better then OEM new state and for less then what OEM rotors would cost if they were ever available...

Contact me using PM or info@messnermoto.com

« Last Edit: August 18, 2018, 03:16:42 pm by MessnerMoto »

Offline 754

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Re: Billet CNC Oil Pump Rotors
« Reply #1 on: July 09, 2018, 12:30:26 pm »
 Nice, thanks for the time, effort, and massive expense you are putting out.
 It really helps the SOHC community., and is greatly appreciated.
Maker of the WELDLESS 750 Frame Kit
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Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

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Lost quite a few CB 750's along the way

Offline kmb69

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Re: Billet CNC Oil Pump Rotors
« Reply #2 on: July 09, 2018, 12:35:03 pm »
Mirko, That's cool!
Are the radii a proper trochoidal form?
How much per set?

« Last Edit: July 09, 2018, 12:39:23 pm by kmb69 »

Offline Jerry Rxman Griffin aka MuthaF'er

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Re: Billet CNC Oil Pump Rotors
« Reply #3 on: July 09, 2018, 01:00:42 pm »
Yeah, and what's in the box?
As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline kmb69

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Re: Billet CNC Oil Pump Rotors
« Reply #4 on: July 09, 2018, 01:06:24 pm »
Yeah, and what's in the box?

Spanky, You sure are nosey!  :o

Offline MessnerMoto

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Re: Billet CNC Oil Pump Rotors
« Reply #5 on: July 09, 2018, 01:16:52 pm »
thx guys ;)

Please send me email to info@messnermoto.com or send me PM here for more info.

« Last Edit: July 09, 2018, 01:31:26 pm by MessnerMoto »

Offline MessnerMoto

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Re: Billet CNC Oil Pump Rotors
« Reply #6 on: July 09, 2018, 01:22:04 pm »
Mirko, That's cool!
Are the radii a proper trochoidal form?
How much per set?

yep the form is generated using professional software. It is not a duplicate of original rotors...but you will not be able to see the difference
between original and this billet rotor shape with naked eye

Offline slikwilli420

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Re: Billet CNC Oil Pump Rotors
« Reply #7 on: July 09, 2018, 01:24:40 pm »
Awesome! Email sent.

Email didn't go through. Can you please confirm your email Mirko?
All you gotta do is do what you gotta do.

Vintage Speed Parts Mashup: http://forums.sohc4.net/index.php?topic=133638.0
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'76F CB750 Patina Redemption: http://forums.sohc4.net/index.php/topic,174871.0.html

Offline MessnerMoto

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Re: Billet CNC Oil Pump Rotors
« Reply #8 on: July 09, 2018, 01:31:08 pm »
sorry Matt typing error o at the end of info@messnermoto.com

Offline MCRider

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Re: Billet CNC Oil Pump Rotors
« Reply #9 on: July 09, 2018, 01:50:23 pm »
follow
Ride Safe:
Ron
1988 NT650 HawkGT;  1978 CB400 Hawk;  1975 CB750F -Free Bird; 1968 CB77 Super Hawk -Ticker;  Phaedrus 1972 CB750K2- Build Thread
"Sometimes the light's all shining on me, other times I can barely see, lately it appears to me, what a long, strange trip its been."

Offline MessnerMoto

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Re: Billet CNC Oil Pump Rotors
« Reply #10 on: July 10, 2018, 11:24:56 am »
Things are multiplying;)

Offline RAF122S

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Re: Billet CNC Oil Pump Rotors
« Reply #11 on: July 10, 2018, 04:36:29 pm »
So, how much are these going to cost? This fit both cb550 and cb750?
David stuck in the curvy back roads of "Upper East" TN

Offline MessnerMoto

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Re: Billet CNC Oil Pump Rotors
« Reply #12 on: July 10, 2018, 10:08:25 pm »
So, how much are these going to cost? This fit both cb550 and cb750?

I sent you a PM message.

I don't think it is compatible with cb550... but maybe somebody can give this info

Offline 70CB750

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Re: Billet CNC Oil Pump Rotors
« Reply #13 on: July 11, 2018, 06:33:10 am »
Way cool!

Online turboguzzi

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Re: Billet CNC Oil Pump Rotors
« Reply #14 on: July 11, 2018, 08:39:09 am »
oh you 750 centric people..... :)

550 has only one rotor to begin with, no return side

the external diameter fo the rotors should be listed in the dimensional wear limit data of both shop manuals,
if same, trimming it to right width shouldnt be an issue IMHO. 

but mirko, since it's all CNC and no tooling, it would be just a matter for scaling the CAD to the diameter for the 550 rotors.... the beauty of new mfg...

Offline MessnerMoto

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Re: Billet CNC Oil Pump Rotors
« Reply #15 on: July 11, 2018, 09:17:26 am »
oh you 750 centric people..... :)

550 has only one rotor to begin with, no return side

the external diameter fo the rotors should be listed in the dimensional wear limit data of both shop manuals,
if same, trimming it to right width shouldnt be an issue IMHO. 

but mirko, since it's all CNC and no tooling, it would be just a matter for scaling the CAD to the diameter for the 550 rotors.... the beauty of new mfg...

Maybe you are correct Yoss but there is a fun fact about this gerotors....

When I reverse engineered original OEM rotors I found out that like usual engineers choose round numbers :)

Supply side of pump is engineered that it supplies exactly 5 liters of oil at 1000rpm, return side is exactly 50% bigger and it pumps 7.5L at 1000rpm

...and to get back to 550 oil pump... one important factor/parameter is how much is center of inside rotor is moved from center of outside rotor. If this is exactly the same like on cb750 pump then it is just the matter of scaling like Yoss suggested... I would bet that 550 rotors have exactly the same form like cb750 rotors just they are longer....

Online turboguzzi

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Re: Billet CNC Oil Pump Rotors
« Reply #16 on: July 11, 2018, 11:00:44 am »
yep, offset of the shaft is critical. regretfully, the 500 manual only list clearance between rotor and housing, not diameter, so no answer, but i would tend to believe that honda used a single rotor dia/shaft offset for all models around that time, chnaging only width. Kaz Yoshima used GL1000 rotors modified for his 400 for exmaple, but i dont have solid numbers, my oil pump is already mounted..

Offline MessnerMoto

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Re: Billet CNC Oil Pump Rotors
« Reply #17 on: July 11, 2018, 11:52:07 am »
...So if somebody on this forum can give us some measurements from cb550 oil pump rotors(actual name gerators) that would be great

Offline kmb69

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Re: Billet CNC Oil Pump Rotors
« Reply #18 on: July 11, 2018, 12:48:04 pm »
...So if somebody on this forum can give us some measurements from cb550 oil pump rotors(actual name gerators) that would be great

Appears the CB500/550 gerotors are 4/5, 40.54mm OD, 27mm Wide, 11mm shaft, and 3.4mm offset.

Offline kmb69

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Re: Billet CNC Oil Pump Rotors
« Reply #19 on: July 11, 2018, 12:56:02 pm »
.....
but i would tend to believe that honda used a single rotor dia/shaft offset for all models around that time, chnaging only width.
.....

Not exactly. They used 50mm rotors on 13mm shafts in some models - the CB750A for example.
Honda spec'd them, Yamada engineered and produced most of them.

Offline MessnerMoto

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Re: Billet CNC Oil Pump Rotors
« Reply #20 on: July 25, 2018, 06:47:25 am »
Also small update... close to finish
;)

Offline trigger

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Re: Billet CNC Oil Pump Rotors
« Reply #21 on: August 01, 2018, 10:39:38 pm »
Are these available yet ?
 

Offline MessnerMoto

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Re: Billet CNC Oil Pump Rotors
« Reply #22 on: August 03, 2018, 04:52:50 am »
Are these available yet ?

yep. Next week they will be ready for shipping

Offline SOHC4 Cafe Racer Fan

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Re: Billet CNC Oil Pump Rotors
« Reply #23 on: August 07, 2018, 11:07:59 am »
Nice looking product, Mirko.
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Offline MessnerMoto

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Re: Billet CNC Oil Pump Rotors
« Reply #24 on: August 18, 2018, 03:13:25 pm »
Now in stock! Price is 120EU for complete set! Shipping is 8EU.

Offline Medyo Bastos

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Re: Billet CNC Oil Pump Rotors (Now in stock!)
« Reply #25 on: August 23, 2018, 03:57:34 pm »
Got mine, ‘preciate it


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Offline PeWe

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Re: Billet CNC Oil Pump Rotors (Now in stock!)
« Reply #26 on: August 23, 2018, 10:04:52 pm »
I have a strong feeling that I soon will restore an old pump. Gasket kit needed too.
CB750 K6-76 1005cc JMR Billet block.
CB750 K2-75 stock looking project started 2017

Offline PeWe

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Re: Billet CNC Oil Pump Rotors (Now in stock!)
« Reply #27 on: August 30, 2018, 09:38:06 am »
Rotors arrived today! Thanks!

Waiting for Vital seal kit. An old pump will be restored this winter.
CB750 K6-76 1005cc JMR Billet block.
CB750 K2-75 stock looking project started 2017

Offline kmb69

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Re: Billet CNC Oil Pump Rotors (Now in stock!)
« Reply #28 on: September 05, 2018, 08:02:58 am »
Received mine. Thx
Looking real good Mirko!


Offline jus4selling

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Re: Billet CNC Oil Pump Rotors (Now in stock!)
« Reply #30 on: September 17, 2018, 10:51:31 pm »
These look slick!

 

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