9 replies to this topic

[ClitheroeMini]

What options are there for 5 speed gearboxes on 1275 SPIs?

[mini-luke]

Very expensive ones. Look at KAD and Minispares, but expect to pay £2k minimum. Personally I'd spend the £2k on a car with 5 gears!

[stretch tech]

personally i'd spend 2k on a good turbo set up or an SC bmw k series bike twin cam kit who needs 5 gears anyway

[Guess-Works.com]

I'd spend a lot less and get the final drive changed....

[Bean]

We paid a lot less than £2k for one - Second hand, mind you - but even so ... !

[danny79]

what is the shift pattern like on a 5 speed.

are 1, 2 ,3, 4 still in the H pattern

[Guess-Works.com]

Yes in all but the KAD which has a dog leg 1st

[danny79]

awh ok.. so fifth is placed over the reverse?

Edited by danny79, 03 August 2012 - 01:33 PM.

[Tupers]

awh ok.. so fifth is placed over the reverse?

A Jack Knight box is like this:
1--3--5

2--4--R

I think a KAD box like this is:
1--3--5

---2--4--R

It's worth noting that the KAD box is fully straight cut so would be pretty loud. I'd imagine you'd get bored of it fairly quick for road use.

Edited by Tupers, 03 August 2012 - 02:28 PM.

[Guess-Works.com]

KAD 5 speed dog box with dog leg first

  2 4
  | |
+-+-+-+
| | | |
1 3 5 R

Also note that a KAD 5 speed still has a 1:1 5th gear and not an overdrive...

Edited by Guess-Works.com, 03 August 2012 - 04:44 PM.