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Ron T. in KY
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5 Speed Triumph Conversion
#791171 11/24/19 4:46 pm
Joined: Feb 2012
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Kerry W Offline OP
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Couple of requests:

Some time ago there w mention of a member here who had the detail regarding squeezing a 5 speed triumph cluster into a BSA box. I've searched and searched but cannot now find mention of the thread or identify of the said magician. Who is that masked gearbox man? (at least knowing that might narrow the thread search a LOT).

and:

Calling Andy Higham..tried to send you a message but the PM system says you're over the mailbox limit. I'm keen to know detail regarding your conversion of the bolt-up BSA twin gearbox to allow fitting of the swinging arm sandwhich plate and outer cover (after which you mentioned adding a 5 speed Nova box). If email is easier, please drop me a line on [email protected]

Thanks all

Kerry W


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Re: 5 Speed Triumph Conversion
Kerry W #791176 11/24/19 5:29 pm
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Kerry: I think it was the late Forum member California Ron who converted the box to take Tri five speed gear set. Dave Kath would know more about it as he was one of Ron's good pals. As I recall there was some machining and welding and it may have involved casting a new inner cover but I am only going from memory.

Gordo

PS Here is a link to a forum discussion where Ron Halem talks about his gearbox. His handle war Ron in California not as I listed him above.

http://www.britbike.com/forums/ubbthreads.php?ubb=showflat&Number=286648

Last edited by Gordo in Comox; 11/24/19 5:54 pm. Reason: added info

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Re: 5 Speed Triumph Conversion
Kerry W #791188 11/24/19 8:13 pm
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I presume you are talking pre-unit engines?
If the pre-unit gearbox has the same shaft spacing as the A65 (2.000") then one of the A65 5 speed gearboxes that are available would be an easier conversion than the Triumph 5 speed which has 1.915" shaft centres.
You can find the A65 5 speed conversion discussions in that forum.

Re: 5 Speed Triumph Conversion
Kerry W #791195 11/24/19 8:52 pm
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Kerry
I needed to add metal around the gasket face of the shell to match the shape of the sandwich plate. I also needed to cut out and add metal to accommodate the swing of the quadrant. I will try to get photos when I get back to my workshop


BSA B31 500 "Stargazer"
Greeves 200 "Blue Meanie"
Greeves 350
Greeves 360
Suzuki GSX1100 EFE "Sorcerers Apprentice"
GM500 sprint/LSR bike "Deofol"
Jawa 500 "Llareggub"
Aprilia RSV Mille "Lo Stregone"
'35 & '36 OK Supreme
Kawasaki ZZR1400 "Kuro no senshi"
Re: 5 Speed Triumph Conversion
Kerry W #791244 11/25/19 5:46 am
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Kerry W Offline OP
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Thanks all. Good information.

Andy H - would be appreciated - have held the parts against each other and saw that the different shape of the cases/plates would require some addition of metal to keep the oil in and rain out!

Kerry W


No generalisation is wholly true, not even this one.
Oliver Wendell Holmes
Re: 5 Speed Triumph Conversion
Kerry W #792593 12/11/19 5:41 am
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the easy way is to use a pre-unit Triumph gearbox.....and install the 5 speed cluster from a later triumph
Swiss

Re: 5 Speed Triumph Conversion
Kerry W #792595 12/11/19 6:38 am
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Kerry W Offline OP
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Thanks swiss32...thought so too, though I need the bolt-up BSA shell..


No generalisation is wholly true, not even this one.
Oliver Wendell Holmes
Re: 5 Speed Triumph Conversion
Kerry W #792606 12/11/19 1:35 pm
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Hello Kerry I have a spare semi unit gear box shell if needed. Jeff

Re: 5 Speed Triumph Conversion
Kerry W #792607 12/11/19 1:35 pm
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Hello Kerry I have a spare semi unit gear box shell if needed. Jeff

Re: 5 Speed Triumph Conversion
Kerry W #792667 12/12/19 3:08 am
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Kerry W Offline OP
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Thanks Jeff, though my post was poorly worded - I have a shell (actually a couple); it's the bolt-up 'nature' of the shell that fits with the engine I'm using (Greeves).

Thanks for the thought though.

Kerry W


No generalisation is wholly true, not even this one.
Oliver Wendell Holmes
Re: 5 Speed Triumph Conversion
Kerry W #792696 12/12/19 2:29 pm
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Kerry
Here are some photos as promised. Yes I know the circlip groove is damaged
[Linked Image from live.staticflickr.com]20191212_134325 by Sigma Projects, on Flickr
[Linked Image from live.staticflickr.com]20191212_134231 by Sigma Projects, on Flickr
[Linked Image from live.staticflickr.com]20191212_134331 by Sigma Projects, on Flickr
[Linked Image from live.staticflickr.com]20191212_134305 by Sigma Projects, on Flickr


BSA B31 500 "Stargazer"
Greeves 200 "Blue Meanie"
Greeves 350
Greeves 360
Suzuki GSX1100 EFE "Sorcerers Apprentice"
GM500 sprint/LSR bike "Deofol"
Jawa 500 "Llareggub"
Aprilia RSV Mille "Lo Stregone"
'35 & '36 OK Supreme
Kawasaki ZZR1400 "Kuro no senshi"
Re: 5 Speed Triumph Conversion
Kerry W #792773 12/13/19 3:53 am
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Kerry W Offline OP
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Thanks Andy, that's pretty much exactly what I'd figured would eb required. Did you just fill/build-up with weld, or did you transplant a piece liberated from a swinging arm case?

Cheers

Kerry W


No generalisation is wholly true, not even this one.
Oliver Wendell Holmes

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