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1Back to top Go down   Selector Shaft Outer Diameter? Empty Selector Shaft Outer Diameter? Mon Aug 09, 2021 3:29 pm

tjh1985

tjh1985
Silver member
Silver member
Does anyone know the exact outer diameter of the 30-tooth end of the Selector Shaft (see pic with red circle below)?

I finally found the perfect 30-tooth offset Shift Arm (pic below) that would give my custom 1985 K100 a straight Shift Linkage Rod (rather than the curved one that broke) from my rearset to the Selector Shaft, but when it arrived the diameter of the offset shift arm was much smaller than the diameter of the Selector Shaft and it doesn't fit.

The purchased Offset Shift Arm has an OD of is 11.35mm
The K100 Selector Shaft OD is UNKNOWN and I'm hoping someone here does know.



I tried to measure it myself with a cheap plastic caliper, but there is no way I'm getting the exact specs on the Selector Shaft.


I figure I'll either find the same type of offset with the correct diameter or try to re-drill the part I have with the correct OD.


If I did want to try and drill the proper OD into the purchased part (pic below);

1. What type of drill bit would I buy?
2. Where could I buy it (I have a drill press)?

Thank you in advance for all the help on this one! I really am hoping to get back to riding before Fall comes - I live in Seattle so the dry days are few and far between.

Thomas

Selector Shaft Outer Diameter? K100_s10
 Selector Shaft Outer Diameter? Offset11

    

2Back to top Go down   Selector Shaft Outer Diameter? Empty Selector Shaft Outer Diameter? Mon Aug 09, 2021 9:54 pm

Tom G

Tom G
Life time member
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G'day tjh1985, According to my verniers, the diameter is 13.75mm . Perhaps somebody can confirm that.


__________________________________________________
1986 K100RT Ex Police (Slightly modified)
2010 Suzuku DL650 V Strom
1992 R100R
    

3Back to top Go down   Selector Shaft Outer Diameter? Empty Selector shaft Mon Aug 09, 2021 11:09 pm

daveyson

daveyson
Life time member
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I measure 13.4 with an El cheapo  vernier and sunburnt retinas on an '84 model.


__________________________________________________
11/1985 bmw k100rt (late model)  Vin. 0090567
 ~120,000 km
    

4Back to top Go down   Selector Shaft Outer Diameter? Empty Re: Selector Shaft Outer Diameter? Wed Aug 11, 2021 9:32 pm

Shep

Shep
Life time member
Life time member
Well, I may not make this discussion any clearer but my 1984-85 gear shifter shaft shows 13.56 - 13.57 OD. Just removed the lever now for the measurement and used a  PA (Princess Auto) Power Fist Chinese product to measure it. I believe the measuring device is reasonably accurate!
Will measure again to ensure my eyes are working properly.
Shep


__________________________________________________
Model        Production Date/Serial Number
K100RS      1984 July/ (F0040448)
K100RS      1986 Dec/ (H0142581)
    

5Back to top Go down   Selector Shaft Outer Diameter? Empty Re: Selector Shaft Outer Diameter? Wed Aug 11, 2021 11:46 pm

Rick G

Rick G
admin
admin
what is the piece you are wanting to buy for, it looks like Honda to me and if so then it should fit. Many of the Honda splines are the same as the K100.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 2004 K1200GT 1998 K1100 LT, 1986 K75 GS.
    

6Back to top Go down   Selector Shaft Outer Diameter? Empty Re: Selector Shaft Outer Diameter? Thu Aug 12, 2021 2:36 am

Laitch

Laitch
Life time member
Life time member
tjh1985 wrote:The purchased Offset Shift Arm has an OD of is 11.35mm
I figure I'll either find the same type of offset with the correct diameter or try to re-drill the part I have with the correct OD.
The offset shift arm has a hole with a diameter, not an OD. If you expand the diameter of the shift arm hole, you'll remove all its splines. What will keep the shift arm from rotating around the gear selector shaft after you've cut off all the shift arm's splines increasing the hole's diameter? There are tools for the drill press that could expand that hole but I think the project needs more consideration before they are purchased.


__________________________________________________
1995 K75 81,000 miles
Selector Shaft Outer Diameter? Usa-lo10
    

7Back to top Go down   Selector Shaft Outer Diameter? Empty Selector shaft Thu Aug 12, 2021 2:47 am

daveyson

daveyson
Life time member
Life time member
Also there's probably two diameters cause of the splines. Maybe removing the bolt helps, or spreading it a bit if it's not too far out.


__________________________________________________
11/1985 bmw k100rt (late model)  Vin. 0090567
 ~120,000 km
    

8Back to top Go down   Selector Shaft Outer Diameter? Empty Re: Selector Shaft Outer Diameter? Thu Aug 12, 2021 3:19 am

Laitch

Laitch
Life time member
Life time member
daveyson wrote:Also there's probably two diameters cause of the splines.
There is the diameter of the hole. The other measurement involves the profile of the spline cut into the hole's perimeter; however, in this case if removing fasteners and spreading stuff is the chosen path, all the ridiculous preoccupation with measurement or fit can be tossed out the window. 
cheers



Last edited by Laitch on Sun Aug 15, 2021 12:30 am; edited 1 time in total (Reason for editing : A ridiculous preoccupation with clarity)


__________________________________________________
1995 K75 81,000 miles
Selector Shaft Outer Diameter? Usa-lo10
    

9Back to top Go down   Selector Shaft Outer Diameter? Empty Which Honda's? Thu Aug 12, 2021 3:30 pm

tjh1985

tjh1985
Silver member
Silver member
RicK G wrote:what is the piece you are wanting to buy for, it looks like Honda to me and if so then it should fit. Many of the Honda splines are the same as the K100.

@RicKG that is really helpful to know - do you know which Honda models would be the best place to start? The part showing is supposed to be a "universal" size but the part I bought is way too small so I'm guessing it's not for any of the Honda models you are referring to.

Thanks so much for this info

Thomas

    

10Back to top Go down   Selector Shaft Outer Diameter? Empty Re: Selector Shaft Outer Diameter? Thu Aug 12, 2021 8:29 pm

Rick G

Rick G
admin
admin
Most if not all of the cross frame 4s and twins of the 70s, 80s and 90s used that spline.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 2004 K1200GT 1998 K1100 LT, 1986 K75 GS.
    

11Back to top Go down   Selector Shaft Outer Diameter? Empty Thank you! Fri Aug 27, 2021 3:37 pm

tjh1985

tjh1985
Silver member
Silver member
Looks like I need to make a custom part and called up a few places in my area (Seattle) to see if they could do it, but haven't found anyone who can make the spline portion.  The best I got was that if I do find someone to drill out a proper fitting spline it will cost me $400-$800 just for that portion. If anyone knows anyone who can machine the spline piece and is willing to pass their contact on to me that would be fantastic. Otherwise I'm back to square one.

I'll close this thread down soon if there is no more activity on it..

Thanks agian,

Thomas

    

12Back to top Go down   Selector Shaft Outer Diameter? Empty Re: Selector Shaft Outer Diameter? Fri Aug 27, 2021 8:48 pm

Rick G

Rick G
admin
admin
Put the stock lever and footpeg plates back on and see if that works, then you will know if the problem is related to the gearbox or the after market shifter and the same for the clutch cable.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 2004 K1200GT 1998 K1100 LT, 1986 K75 GS.
    

13Back to top Go down   Selector Shaft Outer Diameter? Empty Re: Selector Shaft Outer Diameter? Sat Aug 28, 2021 2:21 am

poddy

poddy
Silver member
Silver member
There you go Thomas listen to Rick. Or get a bigger Hammer affraid Poddy.

    

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