Jim & Mark's Mini & Moke Page

Mark's other mods

5  Speed mini gear box Mark is very cluey when it comes to the modifications. He built the 5 speed gearbox over twenty years ago before it was being done elsewhere. He sent a couple of pictures over to the UK to see if they were interested in the idea and six months later they were producing them. We will add more info on this mod later.
Twin plate clutch This is a very simple but effective idea, it uses two clutch plates with the one pressure plate. This gives you twice the grip without having a really heavy pedal from a strong pressure plate. Mark said he never got it to slip even with his supercharged 1430
Big bore motor This used the 74.7mm Triumph pistons with a stroked crank giving a capacity of 1500cc You can see by the pics that there is not a lot of metal left between numbers 2 & 3. Three of the cylinders required sleeves as you can't really bore this big without hitting galleries.
Austin Radiator This is works really well. There are no problems with over heating and easy to get in and out. This is out of an early modle Austin. Cheaper than a four core mini unit too.