Oversize pistons

Post by **noiseguy** » Sun Nov 06, 2005 11:22 pm

maddog wrote:I was able to get the port matched j.c.c pistons last yr. i can check to see if they still have them.

JCC will probably dig out the dies and make them for that quantity. Trick is finding a distributor who has them in stock. I'd be interested in one, I'd estimate at least a dozen others would as well.

darat · Post by **darat** » Mon Nov 07, 2005 6:49 am

you could make some $ on this one. so try to find a couple. oh yeah how many cc's is the new one.

Post by **noiseguy** » Mon Nov 07, 2005 9:19 am

A 2mm overbore would be about 55cc or so. Major benefit is being about to use badly scored jugs to fit them. I think 43mm is about as big as you can go with the stock bore, without getting into problems with changing the porting.

darat · Post by **darat** » Mon Nov 07, 2005 9:39 am

so it will give u more power

Dewey · Post by **Dewey** » Mon Nov 07, 2005 3:49 pm

The local Honda shop says they can get either a .010 or a .020 over piston. I dont know if .010 is enough to clean up the bore but we'll see.

Post by **noiseguy** » Mon Nov 07, 2005 9:20 pm

Ah, right. They're available from Honda in +.25 and +.50mm over.

deathwish · Post by **deathwish** » Mon Nov 07, 2005 11:02 pm

is that enough to effect anything???????

vette76 · Post by **vette76** » Mon Nov 07, 2005 11:17 pm

i have .50 in my ride, and no performance increase.

maybe if it was slightly ported??

maddog · Post by **maddog** » Tue Nov 08, 2005 12:45 am

They do sell the jcc pistons but are out of stock for the spree, they will call the distributor for piston size.

Post by **noiseguy** » Tue Nov 08, 2005 8:46 am

A .5mm increase won't affect anything. You'll probably notice a 2mm overbore, though. Major benefit is being able to use previously "junk" bores.

maddog · Post by **maddog** » Wed Nov 09, 2005 6:24 pm

jcc pistons are the same size as honda.

Post by **noiseguy** » Wed Nov 09, 2005 10:31 pm

maddog wrote:jcc pistons are the same size as honda.

Yes, except you can't get the 2mm overbore Spree pistons through Honda... actually I'm betting that smaller overbore JCC pistons would be cheaper than they would be through the Honda dealership.

Dewey · Post by **Dewey** » Thu Nov 10, 2005 5:49 pm

Where can I get a jcc piston and how much are they?

Mormonmopedmaifa · Post by **Mormonmopedmaifa** » Fri Nov 11, 2005 3:49 pm

I just found out i have to do an engine rebuild becuase my piston and cylinder walls are all scratched up. ( some metal from sumwhere got on the side of the piston i thnkit was a peice of the rings or sumthin cause it was really thin and it scrathed the heck out of the walls. the scrathes arent too deep but thers a lot of them. i was wondering if i could take this somewhere and get them to bore it out just slightly bigger nad get a new piston and stuff that would all fit without it being to much of a pain. my only other option is to jusst get a new stock cylinder head and piston but i figure i mihgt as well try and get a bit of performance with it all in pieces and stuff.

vette76 · Post by **vette76** » Fri Nov 11, 2005 4:38 pm

you shouldnt need a new head. bore is around $40. piston+rings around $65.