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  #1  
Old 09-03-2017, 07:23 AM
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Gear change mechainism repair

mechanism....

https://www.maxbmwmotorcycles.com/fi...png?v=07242017

If the long rod section of the mechanism has snapped, is that rod repairable or replaceable?

#7..I'm hoping it's a threaded rod that can just be removed and replaced?

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  #2  
Old 09-04-2017, 12:54 AM
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Beech Beech is offline
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Re: Gear change mechainism repair

I threaded the stub of the rod, made an aluminum section with a female threaded part for the stub and a male threaded section for the hemispherical bearing. Careful measurements needed for the exact overall length needed. I used a piece of aluminum rod about 8mm dia. and worked it over on a lathe. The replacement part is very expensive so you might give it a try or have a friend with some tools give it a shot. Darn part goes away on a left side drop. Hold the stub while threading it, don't think letting it spin in the works is a good thing.
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  #3  
Old 09-04-2017, 01:27 AM
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Re: Gear change mechainism repair

Thanks Beech. I've bought a 1300 setup to add to my 1200r but the rod is broken.
When I get hold of it I'll have a more informed look. Cheers
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  #4  
Old 09-04-2017, 01:40 AM
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Re: Gear change mechainism repair

Well this is a different egg. The bike computer knows what is on the bike. You will have to "teach" the computer what is going on. The plan is to once installed, start the bike on the center stand (or ride slowly) going through each gear for 10 seconds each. This should set things up. I hope it all works out for you. Please come back with results to help us all.
(interesting how details are left out of so many situations)
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  #5  
Old 09-04-2017, 01:47 AM
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Re: Gear change mechainism repair

It's just the hardware. I'm not connecting the quick shifter. Does that matter?
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  #6  
Old 09-04-2017, 07:29 PM
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Re: Gear change mechainism repair

From a purely mechanical perspective, it should not matter.

But... I dunno about the black magic that happens in the onboard computers
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  #7  
Old 09-08-2017, 11:28 PM
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Re: Gear change mechainism repair

If the shifter is not plugged in there is no signal for the clutchless operation to happen and you can just shift normally. I am about to do that to my S1000R bike, remove the quick shift linkage and replace with an OEM solid rod. Don't like the mushy quality of the quick shift linkage.
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  #8  
Old 09-09-2017, 05:18 AM
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Re: Gear change mechainism repair

It's not intuitive how to remove the quick shift bits off the shaft. What I have is a shaft snapped at the lower end.
It must be fastened on somehow as it doesn't budge.
Any clues how to get it to slide off? If I can get it off, maybe a tig weld can fix the shaft?
Otherwise, removal and rod replacement is the other option.
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  #9  
Old 09-09-2017, 12:57 PM
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Re: Gear change mechainism repair

I don't think you can take it apart and have a shaft. I suggest you take an overall measurement using accurate repeatable reference points to make a new one. Get a piece of aluminum shaft same diameter and thread each end for the hemispherical end pieces. The shaft is 6mm in diameter and I get 160 mm center of each hemispherical ball. So you will need to lay this out and figure out how long to make the shaft with 6mm threads to end up with some adjustment and have your ball connectors at about 160mm. This is easier than repairing the broken piece. But if this unit is from the bike, save the broken unit for possible repair if you ever want to get the quick shift going again as they are very expensive and electronically matched to the bike computer. You can go through a "relearning" process for this unit or new ones though.
Pulling the hemi joints from the old unit you should hold the shaft not the switch body.
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  #10  
Old 09-10-2017, 03:06 AM
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Re: Gear change mechainism repair

Thanks Beech.
I got the whole mechanism from a wreck reasonably cheap. It's from a 1300 to go on my K1200r to improve shifting. It's one of those things reported to be a good upgrade for the older bike.
I think I'll do a new rod and also repair the broken one with the electronics on it. Two options is always better than one!
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  #11  
Old 09-10-2017, 05:45 AM
paulmogs paulmogs is offline
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Re: Gear change mechainism repair

Unsure of the K13 thread configuration, but the K12 has right hand on top, and left hand thread on the bottom ball joint.

So you can loosen lock nuts, and adjust shaft for length for lever position, without having to remove said shaft.
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  #12  
Old 09-10-2017, 05:47 AM
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Re: Gear change mechainism repair

Aaaaaand...what happened to the R11RS that did a failure to proceed? (Border run)

EDIT: curious lurking minds.
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  #13  
Old 09-10-2017, 07:30 AM
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Re: Gear change mechainism repair

R100RS...Buddys R100RS's valves closed shut. We tried everything except the simple..check the valves..oh well, lesson learned.
Got into Burra for a motel and swapped most of the bits from my bike to his searching for the issue. No success. We mentioned valves a couple of times but didn't take that leap.

The 81-84 years had issues with valve seat recession and his might've suffered from that. It hasn't been taken down yet.
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  #14  
Old 09-11-2017, 04:59 AM
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Re: Gear change mechainism repair

For anyone elses reference, the quick shift shaft measures 5.9mm (6) and the length is 130mm.

Eye to eye to the spherical ball at each end is close enough to 160mm, as Beech wrote above.
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  #15  
Old 09-11-2017, 05:23 AM
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Re: Gear change mechainism repair


Quote:
Originally Posted by boxerboy81
R100RS...Buddys R100RS's valves closed shut. We tried everything except the simple..check the valves..oh well, lesson learned.
Got into Burra for a motel and swapped most of the bits from my bike to his searching for the issue. No success. We mentioned valves a couple of times but didn't take that leap.

The 81-84 years had issues with valve seat recession and his might've suffered from that. It hasn't been taken down yet.

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  #16  
Old 09-12-2017, 12:01 AM
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Re: Gear change mechainism repair

Quote:
Originally Posted by paulmogs
Unsure of the K13 thread configuration, but the K12 has right hand on top, and left hand thread on the bottom ball joint.

So you can loosen lock nuts, and adjust shaft for length for lever position, without having to remove said shaft.

This is an important point. I believe this is the same on the K13. Without having opposite threading at the ends (one end left threaded, and the other right), it would be a real pain to adjust the length.
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  #17  
Old 09-12-2017, 11:45 AM
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Re: Gear change mechainism repair

Just unsnap one end or the other (removed the lock pin and don't loose it) and your good to make any adjustment you need. Easier than chasing down a left hand thread 6mm die. Takes 10 seconds to take off and a minute to re install. You should do this to both ends once a year or more just to lube them.
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  #18  
Old 09-22-2017, 03:50 AM
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Re: Gear change mechainism repair

Bought the rod, sorted the threads. 160mm eye to eye, now just to mount it.
Next weeks task!


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  #19  
Old 09-22-2017, 04:10 AM
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Re: Gear change mechainism repair

A worthless snippet of information...

Those ball-ends are pretty universal, they have a high density foam/sponge seal between the ball end, and ball it attaches to, to reduce dirt/water getting into said ball. I make my own with 2 different size wad punches & some high density foam.

Last time I priced the seals (couple of years ago) Triumph wanted $14.50 each, & BMW about $4.50 ea.
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  #20  
Old 10-03-2017, 04:42 AM
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Re: Gear change mechainism repair

I did a leisurely 100kms today thru the hills around NE of Melbourne. Warrandyte to Kinglake, then Toolangi, Chum Creek and Yarra Glen. Lots of hills, straights and corners and I can say that the improvement with the 1300 mechanism is fantastic.

N to 1st still has a clunk but 1->2 snicks beautifully unless the rpm is too high.
Everywhere else snicks very well and feels seamless at the higher gears. I heard another rider on a green Kawasaki sports bike shift from 1st to 2nd from 100m away and it went CLUNK! but he was at a roundabout and low rpm.

Next mod will be to fit the 1300 driveshaft. That reportedly also makes a difference to the ride.

https://i.imgur.com/O4PpvBl.jpg?2
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