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SB6 Gearbox
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SiBag



Joined: 03 Mar 2012
Posts: 251
Location: Cheshire
PostPosted: Mon May 27, 2013 2:43 pm    Post subject: SB6 Gearbox Reply with quote
Went out for a blast up to the Pondarosa (Llangollen)
1/2 way there the gearbox started playing up.
A quick blast away from a junction, 1st - 2nd - 2nd - 2nd no 3rd.
Then I finally get it into 3rd and 4th no problem.
Then it wont change down out of 4th.
Finally get it down the box, then all seems OK. turn around head home and it all starts over again.
Get home and try the gears by hand. Linkage seems stiff lumpy and doesn't spring back etc.
I'm presuming its the Pawl springs ? Any thoughts?
Engine out job I suspect. AAAAARRRRRRRRSSSSSSSSSS Sad
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Si...
SB6..CCM R30...GSXR-750-M...RGV-250-VJ22.. GSX-1100-EFE Project....Harris Magnum II project...

If its got Ti#s or Wheels its gona give you trouble
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Evilchicken0



Joined: 12 May 2010
Posts: 2996
Location: London
PostPosted: Mon May 27, 2013 6:23 pm    Post subject: Reply with quote
Take the gear change off and make sure its moving freely. When you put it back note that it has to be "right" or it fouls and is difficult to change gear.
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SiBag



Joined: 03 Mar 2012
Posts: 251
Location: Cheshire
PostPosted: Mon May 27, 2013 9:26 pm    Post subject: Reply with quote
Thanks for that Evil,
I'll take a look one evening. Just a bit gutted today and was not in the mood to start pulling bodywork off etc..
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Si...
SB6..CCM R30...GSXR-750-M...RGV-250-VJ22.. GSX-1100-EFE Project....Harris Magnum II project...

If its got Ti#s or Wheels its gona give you trouble
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Hursty



Joined: 29 Aug 2012
Posts: 319
Location: New Zealand
PostPosted: Mon May 27, 2013 11:38 pm    Post subject: Reply with quote
If its got Ti#s or Wheels its gona give you trouble Rolling Eyes
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Hursty from kiwi land Smile
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Evilchicken0



Joined: 12 May 2010
Posts: 2996
Location: London
PostPosted: Tue May 28, 2013 1:14 pm    Post subject: Reply with quote
Hursty wrote:
If its got Ti#s or Wheels its gona give you trouble Rolling Eyes
and Italian Laughing
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SiBag



Joined: 03 Mar 2012
Posts: 251
Location: Cheshire
PostPosted: Fri May 31, 2013 12:06 pm    Post subject: Reply with quote
Bugger bugger,
Took the bodywork off last night for a look see.
Looks like the linkage is all ok, gave it a quick strip n clean.
Seamed to go up and down gears ok-ish.
Bike up on stands, fired it up, up the box ok down the box ok. re-checked every thing,
tried up the box again and it didn't want to change 2nd - 3rd. Looks like as it gets hot the problems start.
Think it maybe a little more serious.
Next stage I think will have to be gearbox out.
Ho hum pif n dandy.
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Si...
SB6..CCM R30...GSXR-750-M...RGV-250-VJ22.. GSX-1100-EFE Project....Harris Magnum II project...

If its got Ti#s or Wheels its gona give you trouble
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Vince186



Joined: 23 Mar 2012
Posts: 636
Location: Nijmegen (Netherlands)
PostPosted: Fri May 31, 2013 3:32 pm    Post subject: Reply with quote
That’s too bad, just now the weather is clearing up.

Did you check the engine oil for contamination Question
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vince
A person who never made a mistake never tried anything new. Albert Einstein
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oily



Joined: 05 Apr 2008
Posts: 4788
Location: worcestershire
PostPosted: Fri May 31, 2013 6:46 pm    Post subject: Reply with quote
That's a bit shit Si....
Are you sure it's the box and not the clutch ?
Stick the motor in a jiffy bag and post it down here, I'll sort it for you Wink
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Niels



Joined: 23 Mar 2013
Posts: 24
Location: Groningen, The Netherlands
PostPosted: Mon Jun 03, 2013 1:05 pm    Post subject: Reply with quote
Well the gearbox is one of the very less "weaker" parts of the GSXR enigines. I'm afraid you have to open up the engine...
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Bimsb6



Joined: 15 Oct 2011
Posts: 149
Location: Bedfordshire
PostPosted: Thu Jun 06, 2013 8:30 pm    Post subject: Reply with quote
And then drop in a six speed out of a 750 !
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Evilchicken0



Joined: 12 May 2010
Posts: 2996
Location: London
PostPosted: Thu Jun 06, 2013 10:22 pm    Post subject: Reply with quote
Bimsb6 wrote:
And then drop in a six speed out of a 750 !

Has anybody done that ?
I was trying to sus the ratios and if 6th would be higher or lower than the standard box
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SiBag



Joined: 03 Mar 2012
Posts: 251
Location: Cheshire
PostPosted: Fri Jun 07, 2013 2:36 am    Post subject: Reply with quote
Evilchicken0 wrote:
Bimsb6 wrote:
And then drop in a six speed out of a 750 !

Has anybody done that ?
I was trying to sus the ratios and if 6th would be higher or lower than the standard box


I don't think 6th is any taller, I think 1st is taller and then they are closer ratios.
It was discussed on the old OSS (old skool Suzuki) forum a while back.
The general consensus was that it would be possible, BUT the 750 box is weaker.
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Si...
SB6..CCM R30...GSXR-750-M...RGV-250-VJ22.. GSX-1100-EFE Project....Harris Magnum II project...

If its got Ti#s or Wheels its gona give you trouble
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oily



Joined: 05 Apr 2008
Posts: 4788
Location: worcestershire
PostPosted: Fri Jun 07, 2013 8:35 am    Post subject: Reply with quote
...Plus all the little bits not mentioned like......the 750 is a cable clutch and the 1100 is hydraulic so you'll have to drill the shaft for a push rod OR convert to cable clutch Wink
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Vince186



Joined: 23 Mar 2012
Posts: 636
Location: Nijmegen (Netherlands)
PostPosted: Sun Jun 16, 2013 6:49 pm    Post subject: Reply with quote
Hello Si,

What's the progress Question Question Question
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vince
A person who never made a mistake never tried anything new. Albert Einstein
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oily



Joined: 05 Apr 2008
Posts: 4788
Location: worcestershire
PostPosted: Sun Jul 28, 2013 8:44 am    Post subject: Reply with quote
C'mon Si, there must be some news by now?
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SB6 mk1 (project mega light, big bore)
Sb6 mk2 ( Big Bore)
Sb6 mk2 ( Restored)
Sb6R fighter
Sb6 or Sb7 WANTED
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