[310R]

hi,
my piston reads "72.95" im wondering how many bores i can squeeze out?
also what are my options when ive used my last bore, plating? re-sleeving to a 330 maybe?
thanks in advance..

 

[motorsports601]

hi,
my piston reads "72.95" im wondering how many bores i can squeeze out?
also what are my options when ive used my last bore, plating? re-sleeving to a 330 maybe?
thanks in advance.

im in the same boat and wheres the cheapest to buy pistons?

 

[C-Leigh Racing]

hi,
my piston reads "72.95" im wondering how many bores i can squeeze out?
also what are my options when ive used my last bore, plating? re-sleeving to a 330 maybe?
thanks in advance..

A 72.95 is really a 73mm piston, so you only have one more size you can bore the cylinder to.
73.45 (73.50) is the next size.
You could, if you wanted to go that route, have the sleeve plated at the 73.50mm size, but thats not the normal way its done.
Plating over the iron sleeve is a bit more work envolved than plating an aluminum bore cylinder & cost will be a bit higher than plating an aluminum one as well.

If the machining on the 310 cylinder you have is right, far as where the head studs are placed in the casting, it could be possible to sleeve the cylinder to a 330.
I've done that before on some cylinders, but, some of the older model 310s the head studs are to close to the bore & wont allow the 330 sleeve to be installed.


601
Probably not going to be a cheap place to get a 250R big bore piston, just not many places to get them from anymore & some sizes sometimes are not even in stock.

There will be a new piston on the market shortly for the ol 250Rs. A brand named Wossner, made in germany.
Pistons look close to the forged Wisecos but have the coating on the outsides.
Importer will be LA Sleeve & who ever is one of their dealers will retail them.
Neil

 

[310R]

thanks for the reply Neil..

 

[mstohner]

Hey Neil,


Will Those wossner pistons be in any size or will they be for big bore cylinders?