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1Back to top Go down    Oil pump shaft dimension on Fri Jul 07, 2017 10:31 am

aladin1

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Can anyone tell me the length of the shaft on the later 19 tooth oil pump shaft (pre 01/1990) that has a bolt fix for the water section impeller. Mine is the earlier version with a nut to hold on the water pump impeller. Unfortunately when dismantling the pump the threaded section snapped. A replacement shaft is £138 (OMG) from MotoBins which is a lot of money to me. I would like to repair my broken shaft by converting it to a bolt fix version by removing the threaded section and drilling and tapping the shaft to accept a bolt. The shaft length on my nut fix shaft is 48mm from cog face to the end of the shaft not including the threaded section.
This is not my shaft it is a google image



Last edited by aladin1 on Fri Jul 07, 2017 12:38 pm; edited 1 time in total

    

2Back to top Go down    Re: Oil pump shaft dimension on Fri Jul 07, 2017 10:54 am

duck

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Can you Google around and find a picture to show exactly what dimension you're looking for?

I've got a few old WPs on hand and can measure whatever you'd like.


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Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

3Back to top Go down    Re: Oil pump shaft dimension on Fri Jul 07, 2017 11:03 am

aladin1

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Hi duck
I thought I had attached an image but it hasn't shown on the post. I'll try again.
Alan

it is the length of the long shaft from cogwheel face to the end of the shaft
PS this is not my shaft

    

4Back to top Go down    Re: Oil pump shaft dimension on Fri Jul 07, 2017 12:53 pm

duck

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I don't have any super accurate way to measure it but holding my digital caliper up to it it looks to be about 49mm


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

5Back to top Go down    Re: Oil pump shaft dimension on Fri Jul 07, 2017 1:17 pm

aladin1

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Thanks duck.......I measured my version 1 shaft at 48mm with a steel rule and poor eyesight so between us we're not far out.

    

6Back to top Go down    Re: Oil pump shaft dimension on Fri Jul 07, 2017 4:16 pm

aladin1

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Duck........Could I ask a favour from you? Could you tell me the depth of  the bolt hole inside the shaft?
Alan

    

7Back to top Go down    Re: Oil pump shaft dimension on Fri Jul 07, 2017 4:23 pm

timo27

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Hi Aladin, ive just replaced mine the bolt is about 25mm long if that helps.

    

8Back to top Go down    Re: Oil pump shaft dimension on Fri Jul 07, 2017 8:44 pm

RicK G

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Should be the same because the old and new shafts accepted the same cast impeller and also the new version of the pressed steel impeller.
If you want to drill and tap that hardened shaft you are going to need some very fancy gear.
I have heard the shaft will press out of the gear and a stainless shaft made to replace it but so far I have only heard of one person doing it and I cant find him. Was supposed to be an engineering shop in Melbourne Australia


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If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

9Back to top Go down    Re: Oil pump shaft dimension on Sat Jul 08, 2017 4:11 am

aladin1

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Timo27 thanks for that:thumb: 

RickG......I don't have the facilities to drill and tap it myself, I would be using an engineering machine shop to do the work. Pressing out the shaft and replacing it is an interesting option, but maybe the machining costs will end up the same as buying a new shaft. Decisions, decisions

    

10Back to top Go down    Re: Oil pump shaft dimension on Sat Jul 08, 2017 4:29 am

Inge K.

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11Back to top Go down    Re: Oil pump shaft dimension on Sat Jul 08, 2017 4:50 am

RicK G

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I looked into making a shaft and the new gear from Motobins was a better deal in that it only took a few days to get it to Oz.
Making a one off shaft like that is expensive.


__________________________________________________
If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

12Back to top Go down    Re: Oil pump shaft dimension on Sat Jul 08, 2017 12:46 pm

duck

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aladin1 wrote:Duck........Could I ask a favour from you? Could you tell me the depth of  the bolt hole inside the shaft?
Alan
When trying to figure out bolt hole depth on these bikes you can always look at the parts fiche since it just about always tells you what the bolt diameter and length is.  It's probably safe to assume that the hole is a bit longer than the bolt it accepts. (Less the thickness of what is attached by said bolt.)


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

13Back to top Go down    Re: Oil pump shaft dimension on Sat Jul 08, 2017 2:55 pm

aladin1

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Thanks duck .......Timo27 has told me that the bolt length is 25mm so I will work with that.
Thank you everyone for your help and advice.

    

14Back to top Go down    Re: Oil pump shaft dimension on Sun Jul 09, 2017 6:39 am

timo27

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15Back to top Go down    Re: Oil pump shaft dimension on Mon Jul 10, 2017 11:14 am

Avenger GT

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aladin1 wrote:Thanks duck .......Timo27 has told me that the bolt length is 25mm so I will work with that.
Thank you everyone for your help and advice.
On a pump that I have dismantled here, the hole depth in the shaft is 24mm, and the thread starts 9mm down. The threaded section of the bolt is 22mm long.

    

16Back to top Go down    Re: Oil pump shaft dimension on Mon Jul 10, 2017 6:55 pm

aladin1

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Many thanks Avenger GT that's excellent information. Now to have a word with the machine shop.

    

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