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Flying Duck
PsyKotic Waterfowl
Joined: 27 Jan 2005
Posts: 10102
Location: Bumf***, WA
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 Posted: Thu Jul 17, 2008 3:16 pm Post subject: Stuck in 4th gear? |
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Not me but I got a call from a local rider who left me a voice mail. He said on his way to the rally that his 93 RS is stuck in 4th gear. I think he's heading home in 4th now. 
Just curious if anyone has a guess as to what might cause this. 
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93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
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duckbubbles
Flying Brick Rider
Joined: 01 Jun 2006
Posts: 361
Location: Austin, Texas, USA
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| Posted: Thu Jul 17, 2008 9:23 pm Post subject: |
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A setscrew called a "grub" screw in the selector shaft may have backed out. It holds the arm that does the actual moving of the selector shaft. Transmission disassembly is the only way to fix it if it is indeed the problem.
Frank
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85 K100/1100RS, 321,000 miles, 25 years
96 Ducati 900SS/SP, sold it
05 R1200ST, 35,000 miles, 5 years
400,000 BMW miles |
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93 K11 RS
Mad Brick Rider
Joined: 12 May 2006
Posts: 81
Location: Seattle, Washington
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| Posted: Tue Jul 29, 2008 2:28 pm Post subject: Correct diagnosis! |
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| duckbubbles wrote: | A setscrew called a "grub" screw in the selector shaft may have backed out. It holds the arm that does the actual moving of the selector shaft. Transmission disassembly is the only way to fix it if it is indeed the problem.
Frank |
Yep, the "grub" scrubbed my launch into Wyoming. Just a few hundred from Gillette. Reversed course and rode it home in 4th gear running mostly at 6k RPM's going 80 MPH. Thought I'd burn up my clutch starting out from stop signs when getting gas off I-90, but not the case. The friction plate was in good shape with at least another 64k left on it.
Anyway, I pulled the tranny and hired a "real" mechanic to pop the cover on the tranny and replace the front seal and reinstall the "grub" screw, labor totalled $100. New friction plate $150, seals another $100 which is not bad for a tranny failure several hundred miles from home. I'm lucky that "grub" screw didn't get lodged into the tranny gears, then repairs would be very expensive. BTW, I personally replaced the shift shaft seal, that is a tricky job!
Yesterday, I test rode it and all seems to be good, with exception to excessive play in the swingarm at the pivots off the tranny. However, I noticed that issue a few months back. |
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2xcelr8
Big Brick Rider
Joined: 29 Sep 2009
Posts: 71
Location: SE Wisconsin
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| Posted: Sun Nov 14, 2010 10:38 pm Post subject: Tranny Disassembly |
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I think my 96 K1100RS is on its way to the same issue. I suddenly have excess slop in the shifter although it still shifts. I pulled the tranny today. Has anyone tackled a tranny disassembly themselves? Any tips before I get started?
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Doug
'96 K1100RS, '94 K1100LT, '84 Honda VF700F Interceptor (4 sale) |
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Ted
Site Admin
Joined: 03 Apr 2003
Posts: 1117
Location: Further
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2xcelr8
Big Brick Rider
Joined: 29 Sep 2009
Posts: 71
Location: SE Wisconsin
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| Posted: Mon Nov 15, 2010 2:35 pm Post subject: THAT'S IT! |
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Ted,
Thanks for the links. I only watched part of it but I feel much better about opening the tranny now. I thought I was going to have to pull everything out to get at it. 
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Doug
'96 K1100RS, '94 K1100LT, '84 Honda VF700F Interceptor (4 sale) |
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Ted
Site Admin
Joined: 03 Apr 2003
Posts: 1117
Location: Further
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| Posted: Mon Nov 15, 2010 6:14 pm Post subject: |
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I think he actually gets into the set screw in the second video, it is however a great example of what needs to be removed.
It is also a great opportunity to get a lot of things done, like a spline lube, seals, check the clutch, replace perishables like the alternator monkey nuts & battery tray pegs, clean and treat electrical connections, etc.
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 Ted
KOG#1 |
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dave n
Flying Brick Rider
Joined: 13 Dec 2003
Posts: 316
Location: Gastonia NC
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| Posted: Tue Nov 16, 2010 1:21 am Post subject: Transmission ins & out |
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I would be tempted to install a "Flea Bay" $300 - $400 transmission.
Of course you never know for sure what kind of shape trans is in until
installed and road tested. I don't believe the "K" trans is a common problem
area - haven't noticed much here on failures. May be time for a trans poll -
year / model /miles
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1999 Cagiva Gran Canyon
1993 K1100LT w/Hannigan sidecar
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2xcelr8
Big Brick Rider
Joined: 29 Sep 2009
Posts: 71
Location: SE Wisconsin
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| Posted: Tue Nov 16, 2010 1:52 pm Post subject: Simple Fix |
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Like most of these wrenching tasks, it sounds worse than it is. If you have pulled the tranny to do a spline lube, you can fix the grub screw. I opened the trans and sure enough, the screw was backed out about 3 turns. I removed it, flushed the threads, loctite and reinstall. getting the screw started back into the hole was probably the toughest part. My original fear was that the spring was broke and that looks to involve a bit more. Ted, thanks again for the link. 
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Doug
'96 K1100RS, '94 K1100LT, '84 Honda VF700F Interceptor (4 sale) |
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