I'm wanting to know if they are the same length and width as those used in the rvf400 and later cbr400 Pistons. Thanks

I can when I get home. When you say width and length - do you mean diameter and height?

Height/skirt is definitely different but the bore should be the same:

Sorry Its the actual pin not the hole, like part 3 in this diagram:

http://www.cmsnl.com/honda-vfr400r3-199 ... ml#results

ah yep - will do tomorrow morning

Thanks very much

Height= 42.82mm
Dia= 13.98mm

Will post vernier pics later

Ah ok so that's a few mil longer than the nc29 pin, I was hoping it would be a fewmil shorter.

Reason is I got these moriwaki Pistons in with some parts a while back, I was told they are for the cbx400 but they definitely aren't! I have the parts manual and they are the wrong part no. I think they are either nc30 or cbr400 but they have slightly deeper valve pockets and the pin height is different





In comparison with an nc30 piston

They didn't come with piston pins, so I wonder if I could get the nc29 ones shortened to fit??

Yep - the NC30 pin is longer than the NC35

Not a good pic for measurements but you can see the two here:


L- NC35, R- NC30

Should be a easy thing to machine though

Mystery solved. It seems these are moriwaki f3 race pistons for the nc21