Thumper Club Forum

Club House => Chatter => Topic started by: SteveC#222 on October 05, 2007, 10:02:47 PM

Title: XBR big bore kit?
Post by: SteveC#222 on October 05, 2007, 10:02:47 PM

A bloke down the pub sold me this big bore piston kit for the xbr.  Do you think I'll get away with a rebore or will I need to re-sleeve?


Big bore kit (http://www.hudsonscustommachining.com/piston.jpg)

Title: Re: XBR big bore kit?
Post by: guest27 on October 05, 2007, 10:22:15 PM

The sleeves are fine - but the legs are a little short.

R

Title: Re: XBR big bore kit?
Post by: guest295 on October 06, 2007, 08:28:10 AM

The American thumper forum had a section on tuning, and if memory serves correctly there were always new sleeves for big-bore pistons. On the other hand, I can't see any reason one couldn't bore out the existing sleeve as long as it doesn't go too large. I think 600cc is the outer limit, but there were problems with bores approaching 100mm. And of course the head's a worry.

Title: Re: XBR big bore kit?
Post by: guest7 on October 15, 2007, 07:06:50 PM

Just to clarify, this is what Steve was alluding to:

(http://www.hudsonscustommachining.com/piston.jpg)

Cheers
GC