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 Post subject: gearbox qu
PostPosted: Tue Dec 29, 2015 5:31 pm 
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1098cc
1098cc

Joined: Fri Sep 10, 2004 6:39 pm
Posts: 1770
Location: Kaniva / Adelaide / Melbourne
I have a little play in the input shaft bearing, the one that sits in the wall of the gearbox casing. Should their be any play in this? It is not noisy, just everything else seems firm and i can move the shaft a tiny bit up and down( minimal amount) just on that end. Is it neading that bearing replaced? If so , how?
Cheers,
Steve


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 Post subject: Re: gearbox qu
PostPosted: Tue Dec 29, 2015 6:05 pm 
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1098cc
1098cc

Joined: Fri Sep 10, 2004 6:39 pm
Posts: 1770
Location: Kaniva / Adelaide / Melbourne
It really is minute, the one in the middle has no play, im guessing the first motion bearing and race would keep this end true?
Cheers
Steve


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 Post subject: Re: gearbox qu
PostPosted: Tue Dec 29, 2015 6:26 pm 
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1098cc
1098cc

Joined: Fri Sep 10, 2004 6:39 pm
Posts: 1770
Location: Kaniva / Adelaide / Melbourne
Been reading some uk forums which say it is nothing to worry about ( if very small movement) as it is also supported in the clutch housing casing. I hooked up remote housing and all seems to work as it should, even looks like second gear wont jump out :-)


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 Post subject: Re: gearbox qu
PostPosted: Tue Dec 29, 2015 6:38 pm 
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1275cc
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Joined: Wed Jan 19, 2005 1:52 pm
Posts: 2582
Location: Brisbane
"even looks like second gear wont jump out"
How did you come to that observation?

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The bitterness of poor quality (or Crappy Workmanship) remains LONG AFTER the Sweet Taste of Low Price is forgotten.


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 Post subject: Re: gearbox qu
PostPosted: Tue Dec 29, 2015 6:41 pm 
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1098cc
1098cc

Joined: Fri Sep 10, 2004 6:39 pm
Posts: 1770
Location: Kaniva / Adelaide / Melbourne
lol, just by looking at synchros, spinning in all gears and seeing how firm everything was. Have played around with one I know was stuffed before and things felt a lot looser, I could be wrong, but I cant afford gearbox rebuild at the moment so am keeping fingers crossed!!
Cheers,
Steve


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 Post subject: Re: gearbox qu
PostPosted: Tue Dec 29, 2015 6:57 pm 
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1275cc
1275cc

Joined: Wed Jan 19, 2005 1:52 pm
Posts: 2582
Location: Brisbane
What did 1/2 selector fork and syncro hub look like?

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The bitterness of poor quality (or Crappy Workmanship) remains LONG AFTER the Sweet Taste of Low Price is forgotten.


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 Post subject: Re: gearbox qu
PostPosted: Tue Dec 29, 2015 7:01 pm 
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1098cc
1098cc

Joined: Fri Sep 10, 2004 6:39 pm
Posts: 1770
Location: Kaniva / Adelaide / Melbourne
All looked pretty good, very little wear in selector forks. Is a remote box, feels quite tight when shifting too.


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 Post subject: Re: gearbox qu
PostPosted: Tue Dec 29, 2015 7:03 pm 
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1098cc
1098cc

Joined: Fri Sep 10, 2004 6:39 pm
Posts: 1770
Location: Kaniva / Adelaide / Melbourne
I remember about fifteen years ago when my Dad had to change the selector fork on 1/2 cause it was terribly worn and ended up rebuilding box at the same time, this one looks like a very good fit with little to no wear.


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 Post subject: Re: gearbox qu
PostPosted: Wed Dec 30, 2015 5:33 am 
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Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39754
Location: near Baulkham Hills, NSW
If it moves much the nose of the mainshaft and its needle bearing are worn. Check the shaft has not worn through the hardening.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:


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