.080. overbore .

Torontonian

Torontonian

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Dec 28, 2009
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I've ordered in .060 overbore on the advice by my machinist , from J.S. , forged .
I've heard at the Supershow this Wknd . that my final is .080 . oversize that is available , but who would supply that , not from Andover or J.S.
Thanks .
 
Torontonian said:
I've ordered in .060 overbore on the advice by my machinist , from J.S. , forged .
I've heard at the Supershow this Wknd . that my final is .080 . oversize that is available , but who would supply that , not from Andover or J.S.
Thanks .
Click to expand...
Pretty sure JS could supply them.
 
Torontonian said:
Anything out there already made ?
Click to expand...
Doubtful. In theory, 750 max over is .040 and 850 is .020 (according to the workshop 065146 and the MK2 version)

Hepolite has .060 for 750 and .040 for 850 but no bigger. You already know what JS has.

Of course, you can have them sleeved or buy a used set that fits in what's available or even a new set from AN.
 
Just curious, are you boring from normal wear, or more performance? Just wondering because my 850 is on .020" over at 70K miles and counting.
 
marshg246 said:
Doubtful. In theory, 750 max over is .040 and 850 is .020 (according to the workshop 065146 and the MK2 version)

Hepolite has .060 for 750 and .040 for 850 but no bigger. You already know what JS has.

Of course, you can have them sleeved or buy a used set that fits in what's available or even a new set from AN.
Click to expand...
Hepolite do .060 see here overhttps://www.rgmnorton.co.uk/buy/new-hepolite-850-pistons-60-complete-pairs_187.htm
Hepolite also list .080 over, hepolite part no WW97335P although finding a dealer who has them in stock is another matter....
 
Last edited:
phippsy said:
I did a search and a few companies came up selling Hepolite +80 not companies I have heard of
Click to expand...
Strange. AFAIK, Wassell owns the Hepolite name now. I stock every size of Hepolite Wassell sells. Of course, the pistons are actually JCC so who knows? I'll ask the owner.
 
milfordite said:
Just curious, are you boring from normal wear, or more performance? Just wondering because my 850 is on .020" over at 70K miles and counting.
Click to expand...
Wear . 850 pistons and bore were worn out at .040 . Gord Bush Performance called to say I need to order in .060 pistons to them for the new rebore . Jim has ordered forged pistons in for the springtime , as I will be exploring west Africa with my wife .
 

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