Oversized pistons question

[Shug1e]

Hello, got some bad news from my local machine shop today, turns out i need a rebore on the barrels of my GS1000. The origional bore size is 70mm and i have been advised to buy a set of four 70.50mm pistons and new rings. A new set will cost close to £400 and i was wondering if it is possible to source a set of used 70.50mm pistons but replace with new rings? Thanks Shug1e:-|

[Calvin Blackmore]

this looks nice

http://cgi.ebay.com/ebaymotors/SUZUKI-GS1000-GS-1000-WISECO-PISTON-KIT-3MM-OVER-78-81_W0QQcmdZViewItemQQcategoryZ35595QQihZ020QQitemZ300078670242QQrdZ1QQsspagenameZWD1V

[49er]

this looks nice

http://cgi.ebay.com/ebaymotors/SUZUK...spagenameZWD1V

Yes. And the price looks to be cheaper than the stock oversize. You will notice a big difference with the extra capacity and CR. You can also retain the stock sleeves. They will take a 3mm overbore.

[spchips]

Those look really nice. If I had the $$ those would go into one of my 1000's - they are ready for factory or better compression, after 60,000mi.

[gshub]

Gs1000

At some stage my Gs barrels will need a rebore im not after more power
so no cams will be fitted do I realy need to weld up crankshaft.

[SqDancerLynn1]

If you are splitting the cases for a rebuild I would do it. AT the least you need to check top dead center for #1&4 should be the same or the crank is twisted
My sugestion if money is tight try and fine another set of cylinders

[Shug1e]

Oversized pistons question

Thanks fellas, ordered the WIESCO 3mm overbore kit today. It comes with a new cylinderhead gasket, seems like a good deal, just wish i`d known i needed a rebore before ordering a new Vesrah gasket! Which of the two would you use? does the overbore matter and what is your estimation of the engines CC increase? thanks Shug1e

[49er]

Thanks fellas, ordered the WIESCO 3mm overbore kit today. It comes with a new cylinderhead gasket, seems like a good deal, just wish i`d known i needed a rebore before ordering a new Vesrah gasket! Which of the two would you use? does the overbore matter and what is your estimation of the engines CC increase? thanks Shug1e

I believe I've seen 1085cc quoted for the 3mm oversize. I don't know what type of gasket Wiseco supply with their kits. I don't recall anyone complaining about them though. I used the standard Vesrah gasket on my 850 with 10.5-1 pistons and have had no problems. Your call really.

[Steve]

what is your estimation of the engines CC increase?

After doing the math, the end displacement will be 1084.85 cc. \\/

(Stock was 997.52 cc.)


.

[Dave8338]

I've used the Wiseco gaskets in other over-bored toys and have never had a problem...they supply a high quality product, across the board. \\/