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The head bolts onto the standard head stud configuration, obviously block skimmed to get your desired CR as with any well built engine, although I cannot speak for the "road" kit which had about 120hp.
I am placing my whole car and spares in the sales section soon when I can get a chance to go through everything. well developed over time with more to come from engine , currently a rally car, it but would be better suited to track so it could stretch it's legs properly shall we say

rich@minispares.com wrote:
its the later helical version that gives all the problems. they didn't make the fifth gear correctly and they just chew them selves to bits.

id guess that the big, heavy 13" rover wheels didn't help with the problem either

I have a helical JKD 5 speeder, works nice, and havent noticed any additional metal on the oilplug, when i change oil.

Just found this photo I took of the Jack Knight 16V Mini at Brands Hatch in the early 1990's. It went up against the 16V KAD Mini in 1994 for the 'Fastest Mini in the World Race". As said if I remember right it was a very close race between Peter Baldwin (JK) v Bill Sollis (KAD) and the KAD Mini won?

Some more photos I took some years back of the Jack Knight stand at a Mini show showing their 16V head, 5-Speed s/c syncro & new 6-Speed dog box.

Didn't paul wiltshire who used to work for mini world supposedly have one of those 6 speed box's on his 7 port mini?

He did, ultra rare, his face dropped when my mate said to him, 'yeah i have one of those as well'
(its in the metallic green 1275GT with the Turbo K head that was at MITP if anyone saw it).

Such a pity they aren't the company they were anymore

I would like one.

Wouldn't we all!

thats a KAD though

Scanned some of my JK info from the early 1990's which may be of interest......

Spider wrote:

Tupers wrote:Didn't most of them go to Japan? I'm sure there was a company doing JKD 5spd twin cam conversions over there.

Slightly OT here - the JKD 5 Speed Gearboxes were also fitted by Rover to I believe 60 Mini Coopers, there was an inital run of 50 somewhere in the mid 90's then the last 10 off the line also had them fitted.

Ive got a jkd 5 speed s works mini

From Cars & Car Conversions magazine, approx. 1980/81?

What a brilliant article! It is great to read just how good JK were when they were at the top of their game. Such a shame that the name Jack Knight became soiled by some of the Jokers who continued using the name after the original company ceased trading.

Sorry for the thread rival, if you’ve never seen a JKD 5 speed box taken apart. Curtesy of Guess works.

Part 1
https://youtu.be/dlR0MdXrdHU

Part 2
https://youtu.be/7Uy8ol5RheQ

Part 3
https://youtu.be/cGfU5Ql4rPg

There should be a part 4 coming.

Nathan1293 wrote: ↑Mon Mar 27, 2023 9:26 pm Sorry for the thread rival, if you’ve never seen a JKD 5 speed box taken apart. Curtesy of Guess works.

Many thanks for posting and thanks for the thread revival.....no need to be sorry as it is good to keep all the relevant JK info in one place as a useful reference.

I recently purchased a six speed JKD box, that I’m stripping down and rebuilding. If there is interest I’ll happy post some pictures of this, it will be a while as I’ll take the pictures when I’m rebuilding it.

Twin overhead cam engine for the A series! what a neat thing to produce, shame it never came to anything...

Nathan1293 wrote: ↑Thu Apr 06, 2023 11:09 pm I recently purchased a six speed JKD box, that I’m stripping down and rebuilding. If there is interest I’ll happy post some pictures of this, it will be a while as I’ll take the pictures when I’m rebuilding it.

Photos of your JKD six speed rebuild would be very interesting to see!

Ditto, I'd too love to see the 6 speed.