Is it possible to fit a bike transmission to a car engine? What would you need to build to make it fit? I know how the car setup looks like, but I can't seem to find much good info about the bikes. On pics I can see the transmission being a 1 piece with the engine. Is this right or can you seperate them?

They tend to be an all in one job. The entire case splits in half normally, so there isn't a gearbox casing as such.

Most are all in one with the engine as Si says, so unless you have a CNC machine shop to manufacture your own gearbox casing to hold all the gearsets and mate up to the car engine, its not possible Im afraid.

The only exceptions I can think of are some BMW bikes which have seperate gearboxes, but you still wouldnt be able to fit it to a car engine very easlily at all, and I doubt it would take the torque output anyway.

[Edited on 15/6/07 by ChrisGamlin]

you wont be able to get a bike gearbox onto a car engine without a vast amount of work. If you are after the tap forward to go down and pull to go up gear change (sorry cant remember name for this type of gear box) then you can get them for cars. I know that you can get them in a type 9 from burton power, but they will cost quite a lot.

Sequential gearboxes for car engines are very, very expensive. You can sometimes get a used one for maybe 3.000 pounds, but this is just too much.

Alternative is to get an electronically controlled auto gearbox, you can frig these to tiptronic use

That might be a solution. What gearboxes from what cars can I use? Also what is involved with those gearboxes? Does it need a lot of electronics or is it a simple switchlike system?

I'm sure I heard of a sequential "shifter mechanism" to bolt on the BW T5 box (as found on sierra cosworths and lots of american cars). Never seen one though
Bob

As Bob says I read about one too ages ago but never found much about it since.

Didn't BMW bikes have a separate gearbox like the old Nortons & Triumphs etc? Even if so don't know if it would stand tuned car engine torque?

Chrysler torque flight was one, also Borg warner 63/64.

You can get the 'autoness' removed and just select gears, trouble is only 3 speed auto boxes.

I believe that the layer zf auto boxes also have a box of tricks which control the shifts, but whatever it going to be expensive.

Better off with a bike engine complete and a full power shift kit for £150.

Regards Mark

most bike gearboxes as pointed out are incorperated into the crankcases however there are exceptions.

Of the top of my head moto guzzi's and some of the larger BMW's have a proper bolt onto the back of the engine type gearbox much like you'd fit to a RWD car. They are also shaft drive so fitting a propshaft whoud be relatively easy.

Either that or some of the massey furegesso........sorry i mean harley davidsons have seperate gearboxes from the engines with a ~4" rubber belt transfering the power from engine to gearbox. IMO i wouldnt even consider this option though if only because i cant stand HD's