OP
Fri, 21 Nov 2008 14:45:49 +0000

nothing at all
Joined: Fri, 14 Nov 2008 15:59:03 +0000
Posts: 9656
Location: westla
 
nothing at all
Joined: Fri, 14 Nov 2008 15:59:03 +0000
Posts: 9656
Location: westla
Fri, 21 Nov 2008 14:45:49 +0000 quote
hey ya all,i have a stock barrel and head and corner machine shop to play with.i would like to open the barrel cylinder and ports.when done i would like to match that with my stock 24 carb and crank.how much can i oversize.where and how much on the ports.thanx
Fri, 21 Nov 2008 15:23:46 +0000

Addicted
1978 P200E, 1963 GS 160
Joined: Thu, 31 Aug 2006 16:17:41 +0000
Posts: 663
Location: Decatur, GA
 
Addicted
1978 P200E, 1963 GS 160
Joined: Thu, 31 Aug 2006 16:17:41 +0000
Posts: 663
Location: Decatur, GA
Fri, 21 Nov 2008 15:23:46 +0000 quote
According to vespamaintenance.com here are the oversize specs:

Cylinder Barrel
Type: Cast Iron
Bore Sizes: 66.5 mm (2.618 in)
1st Oversize: 66.7 mm (2.626 in)
2nd Oversize: 66.9 mm (2.634 in)
3rd Oversize: 67.1 mm (2.642 in)

You should be able to buy the larger pistons, rings and stuff from spd, scooterworks, etc.
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