TT Industries gearbox

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I think that if I had a Commando road bike, I would not buy the TTI box. The $700 American close ratio cluster is probably enough, if fitted with the Commando first gear. You'd need to be a bit careful when coming down through the gears, not to forget to rev the motor a bit more - but most of us probably keep count and know what gear we are in.
 
Hi there,
I own my TTI 5 speed road ratios for years, ten years if I remember wel and more as 60.000 kms, never one issues and its look like new inside.
I change my oil every 2.000 miles, and open the box every winter for tcheck up, I never change any part, not even the spring from the selector...
Of course the box is expensive but its worth every cent.
A dream to shift; no need to send a Email to the gearbox to ask the box to go to neutral 100 yards before the traffic lights.
My only regret: TTI was not there in the 70, and I broke a lot of gearboxes on my Koenig race sidecar and a lot of engines to.
Later I swift for a Yamaha 750 TZ, end of the problems
Yves
 
Fast Eddie said:
You’re richer than me John (not too difficult perhaps)!

I found the sticker price quite painful, and thus put the idea off for a long time.

But I have to say that now I’m in a position whereby the pain of the purchase has passed and the pleasure of ownership persists!

I know all TTI owners say so, but it’s true, they are really nice boxes.
Click to expand...

TTI are premium gear boxes with a corresponding price but excellent quality and value; that is if you value durability in stressed situations and appreciate excellent shifting feel and reliability.

What I meant was not recalling sticker shock for the incremental cost for a kick start option. In all honesty the box was purchased on my behalf as part of a build which included some tasty bits.
 
My understanding, from talking to TTI, is that converting a kick start box to a none kickstart is quite easy, a spacer is required (needs to be made, TTI do not sell) to substitute the kick start gubbins and that’s it.

The cost difference between a none kickstart box and a kickstart box, when buying a new, isn’t that much

BUT converting a non kickstart box to kickstart is VERY expensive.
 
Why do you need a TTI gearbox in a road bike when almost anything will do ? A Commando is not a modern motorcycle and it is almost impossible to make it become one. If you need something quicker, for the cost of a TTI gearbox, you can buy a Suzuki gixer.
 
A fair point... and one that is even more valid when it comes to racing...

Who on earth, in their right mind, would choose to race some old relic when you can just buy a GSXR and go proddie racing straight from the crate...?

We do it cos we like it Al. Just like you.

You do have a heck of a knack for asking blindingly stupid questions you know.
 
Cost wise beefing up a Commando is a total waste. But that isnt what it is about, it is all about having fun. Some of us like to dick with the bikes we either had as a kid or wanted to have as a kid. There is no way that you can even think of keeping track of the money involved. Bikes are just for fun
at this point cheaper better transport easily available with a raft of automobile options.
...and yes, I love my TTI.
 
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Money in a bank account is losing value constantly. The only wise thing is to put it in a Commando. Would you rather watch a stack of notes lose value
or a nice shiny Commando?
 
If you’ve got the dosh for one, and you want one, then they’re great, you’ll love it and you’ll think it’s very good value for money.

If you haven’t got that kinda dosh lying around, or don’t think you want one, worry not, your Commando will continue to function beautifully without one, just like it has for the last 40-50 years.
 
Fast Eddie said:
If you’ve got the dosh for one, and you want one, then they’re great, you’ll love it and you’ll think it’s very good value for money.

If you haven’t got that kinda dosh lying around, or don’t think you want one, worry not, your Commando will continue to function beautifully without one, just like it has for the last 40-50 years.
Click to expand...

My bank account will thank you for that comment :)

/Steve, with a pile of bits slowly starting to resemble a Commando engine again....
 
Fast Eddie said:
A fair point... and one that is even more valid when it comes to racing...

Who on earth, in their right mind, would choose to race some old relic when you can just buy a GSXR and go proddie racing straight from the crate...?

We do it cos we like it Al. Just like you.

You do have a heck of a knack for asking blindingly stupid questions you know.
Click to expand...

Well there is my mind made up...sell my Rickman and buya couple fo Gixers, an '85 slabside for UK CRMC and a '96 SRAD for French VMA should do it.....oh bugger....I had those and sold them! Guess why?

If you can't guess, let me give you a clue that I bought a TTi box with something!
 
Hi Pouchy
5 speed TTI box with kickstart on facebook. For sale in Australia 5500 dollars.
That is a good price without the kickstart lol
 
SteveA said:
Well there is my mind made up...sell my Rickman and buya couple fo Gixers, an '85 slabside for UK CRMC and a '96 SRAD for French VMA should do it.....oh bugger....I had those and sold them! Guess why?

If you can't guess, let me give you a clue that I bought a TTi box with something!
Click to expand...


Would a Chev motor and 5 speed Tremac gearbox improve an E-type Jaguar ? My friend builds racing Daytona Coupes with those. - The point I am making is an original Commando is beautiful in it's own right. I can understand guys improving them, but those improvements might reduce their bikes' intrinsic value. With an old bike, you ride it for the experience, A race bike is different. With mine, I try to preserve some semblance of authenticity - most of it's parts were available back in the period. But to me, it is not a thing of beauty. If it was an original manx, I would do anything to keep it original. I once rode an original ex-Ginger Molloy 1961 30M. I am forever grateful to the guy who owned it. I know what a good original Manx feels like, and not many guys can say that.
One day I might find someone who has a Commando which has not been altered and pay for a ride on it. With the Manx, if you are racing - find an original one and pay for a ride on it, you will get value for money. They are a bit different to what you might expect.
 
My mates love my Seeley 850 and tend to get a bit upset if I refer to it as a 'shit heap'. They don't usually work on it. Every thread is different and you need ten spanners and keys to take it apart. It is all functional and works extremely well, but it would drive anyone insane.
 
I would like to warm up this thread. I had an exchange with TTi Industries some weeks ago as I will be ordering a 5 speed XHD standard cluster gearbox soon with the options for no kickstart and left hand shifting.

A couple of questions:
I learnt from another thread that there is interference between the gearbox housing and the left plate cradle. Is this still the case?

Another question is positioning of the clutch basket and hub. Yet another thread had a posting saying the shouldered mainshaft would give poor axial support for the clutch hub , which would be be gnawing on the stepped mainshaft, or vice versa.
Is there a way to avoid this gnawing problem? The mainshaft is splined inboard of the step due to milling run-out, but if AMC managed to make the shifts without the run-out, why can't TTi?

I have toyed with the idea of fitting a T140 mainshaft and complete T140 cushioned clutch (4 springs as per BSA design), but the challenges which follow (different engine sprocket, positioning of basket and sprocket) are too much to handle at this time. The triplex chains are compatible though (ISO 06B-3).

-Knut
 
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Knut,
A lot of material is required to be removed from both sides of the cradle. It is a real PITA.
It wouldn’t be so bad if TTI provided a template etc, but doing it by trial and error / fit and re-fit, is a pain.
I can’t comment on your clutch question, my own overriding conclusion when I nailed mine together was how solid everything seemed to fit up, no silly circlip to pop off under torque etc.
 
yves norton seeley said:
Hi there,
I own my TTI 5 speed road ratios for years, ten years if I remember wel and more as 60.000 kms, never one issues and its look like new inside.
I change my oil every 2.000 miles, and open the box every winter for tcheck up, I never change any part, not even the spring from the selector...
Of course the box is expensive but its worth every cent.
A dream to shift; no need to send a Email to the gearbox to ask the box to go to neutral 100 yards before the traffic lights.
My only regret: TTI was not there in the 70, and I broke a lot of gearboxes on my Koenig race sidecar and a lot of engines to.
Later I swift for a Yamaha 750 TZ, end of the problems
Yves
Click to expand...
Unfortunantly TZ750 sidecars bring a whole new load of problems instead.We are out on ours at the weekend.
 
For future reference:

TTI don't fit cradle - whot do ya do?

A later update to this thread for those fitting TTi boxes... I have a Mk2A 850 fitted with a Mk3 850 engine cradle and swing arm. The TTi box "almost" fits straight out of the crate, with only minor modification needed to the cradle on the drive side - approx 6mm/ 0.25" of material needs to be...
www.accessnorton.com www.accessnorton.com
 
I think the position of the bottom bolt is in a different position on the TTI box and both top and bottom bolts are larger diameter. My box is rigidly mounted and I think I had to re-position the holes in the plates for the bottom bolt, and widen the adjustment slot.
 
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