Motorbike Pistons
Turbo Mini Forums

For the BMW K Head engine im building im looking at using lightweight pistons , preferably bike ones?

Has anyone tried this before? and if so what type were you using.

Have found a couple of 73mm and 73.5mm honda and kawasaki pistons that may be useful but I will have to think about the rods too.

Any info most appreciated

Gaz

i've seen bike pistons used before, i think they were Honda CBR 600 with valve cut outs

Would any bike rods be useable ???

At least they would defo handle high rpm's !!

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

KAD use 73mm Bike pistons on special rods for engines they do now I think!

On 5th Sep, 2011 Vegard said:
I stand corrected. You should know

methinks kwaka zxr750 ones are a very close match

- speak to me about long rods/special pin dia's when required!

JK

If Carling made Mini engines
it would probably be like this one!

it strikes me that theres a lot of 73mm bike pistions sround, all multiply into 1000cc, 250s and 750, but you will need a much longer rod, the pistons iv'e come a cross are 2 ring type and look like a real goer for lightweight install, its just the expence of a pucka set of custom rods to match the two.

carl

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE

yeah i was thinking the rods would have to be special, i did see that johnK has started making special rods!
im going to have a look at what KAD use as it will be pretty similar to that.

what about these? Ive got a few mates who autograss race with suzuki engines so I will ask them if they have any old ones I can play with.

What is your plan for these? Is it just to try and get light pistons to aid a high revving engine?

Every day is a school day ...........

How fast and how expensive ...... the same question...

yeah its for trying to make the engine rev higher and easier, worth a shot i think

Try to get something which has no valve cut outs or something that lines up ok .... don't want it to be butchered too much.

Every day is a school day ...........

How fast and how expensive ...... the same question...

the one's i saw were on mini rods. speak to OZ at OAP (ozbourne automotive preperation)