Upgrade to Bigbore Pistons

  • SWest
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  • 10 22 2014
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03 Jan 2018 17:10 #776884 by SWest
Replied by SWest on topic Upgrade to Bigbore Pistons
Buy the correct gasket. I knew I was going to do a valve job soon so it was only temporary. .
Steve

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  • gordone
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03 Jan 2018 22:58 - 03 Jan 2018 23:14 #776889 by gordone
Replied by gordone on topic Upgrade to Bigbore Pistons
I understand, from where can I purchase and what is recommend?

Purchase the Wiseco head gasket is the best choice?

www.wiseco.com/ProductDetail.aspx?ItemID...Year=1981&AppID=6915

www.summitracing.com/int/parts/wis-w3163/overview/

So to purchase these will be the best option for me?


Thank you all.

1981 KZ650-D4, with 1981 z750L engine (Wiensco 810 big bore).

Project:
www.kzrider.com/forum/11-projects/607213...sr-1981-z750l-engine
Last edit: 03 Jan 2018 23:14 by gordone.

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04 Jan 2018 07:53 - 04 Jan 2018 07:57 #776897 by KZB2 650
Replied by KZB2 650 on topic Upgrade to Bigbore Pistons
Maybe pm Zuckdave or maybe Larry C...... I'd trust their opinion on what to use....... I personaly like the Wiseco but since you have a new oem gasket you could save some cash.

1978 KZ650 b-2
700cc Wiseco kit 10 to 1.
1980 KZ750 cam, ape springs, stock clutch/ Barnett springs.
Vance and Hines Header w/ comp baffle and Ape pods, Dyna S and green coils, copper wires.
29MM smooth bores W/ 17.5 pilots, 0-6s and 117.5 main
16/42 gearing X ring chain and alum rear JT sprocket.
Last edit: 04 Jan 2018 07:57 by KZB2 650.

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  • gordone
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04 Jan 2018 08:49 - 04 Jan 2018 09:10 #776900 by gordone
Replied by gordone on topic Upgrade to Bigbore Pistons

KZB2 650 wrote: Maybe pm Zuckdave or maybe Larry C...... I'd trust their opinion on what to use....... I personaly like the Wiseco but since you have a new oem gasket you could save some cash.


Non of these username exist.

I started a new threat for these question:
kzrider.com/kunena/2-engine/607621-head-...iston-69-00mm#776901

1981 KZ650-D4, with 1981 z750L engine (Wiensco 810 big bore).

Project:
www.kzrider.com/forum/11-projects/607213...sr-1981-z750l-engine
Last edit: 04 Jan 2018 09:10 by gordone.

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  • SWest
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04 Jan 2018 11:58 - 04 Jan 2018 11:59 #776912 by SWest
Replied by SWest on topic Upgrade to Bigbore Pistons
I got the early Z1 gasket because it was cheap and to see of it would leak. It worked great but I could see in my mind the edges glowing and causing detonation. It didn't but I feel better having the proper gasket this time. This is the second use I've gotten out of it. I have the other one hanging up in case I need it in a pinch.
Steve
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Last edit: 04 Jan 2018 11:59 by SWest.

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04 Jan 2018 12:17 #776915 by KZB2 650
Replied by KZB2 650 on topic Upgrade to Bigbore Pistons
Ok its Zukdave without a C (on the second page of this thread) and look under Zukdave's first page of "Drag strip trip" to find Larry C a top notch engine builder and head porter that's been on here for years....... I also see Nessium recommends the Wiseco in your new thread so that's good.

1978 KZ650 b-2
700cc Wiseco kit 10 to 1.
1980 KZ750 cam, ape springs, stock clutch/ Barnett springs.
Vance and Hines Header w/ comp baffle and Ape pods, Dyna S and green coils, copper wires.
29MM smooth bores W/ 17.5 pilots, 0-6s and 117.5 main
16/42 gearing X ring chain and alum rear JT sprocket.

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  • gordone
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04 Jan 2018 13:01 - 04 Jan 2018 13:01 #776916 by gordone
Replied by gordone on topic Upgrade to Bigbore Pistons
Thank you !

Wiseco head gasket W3163

It looks like there are more then one version on the marked with same part number?
Please see attahed photo of my engine.

These gasket looks to missing some wholes:
www.summitracing.com/int/parts/wis-w3163/overview/

But these one looking to be correct, just purchase it?
www.3pracing.com/en/wiseco-head-gasket-w...-750-zn-750-ltd.html

1981 KZ650-D4, with 1981 z750L engine (Wiensco 810 big bore).

Project:
www.kzrider.com/forum/11-projects/607213...sr-1981-z750l-engine
Attachments:
Last edit: 04 Jan 2018 13:01 by gordone.

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04 Jan 2018 18:45 #776941 by zukdave
Replied by zukdave on topic Upgrade to Bigbore Pistons
You need to use a 69 mm bore KZ750 head gasket from Cometic and only Cometic their simply the best on the market IMHO.
Cometic is who makes the Wiseco head gasket.
A factory stock bore gasket will hang inside the bore and have sex with the piston,

1980 KZ650 F1
ZX750A1 motor.
Wiseco 810cc kit.
Zukiworks racing ported head.
VM 29 smooth bore's.
Dyna 2000 Ign. w/Dyna mini coil's
APE cylinder stud's and nut's.
APE valve spring's.
APE Track King clutch.
V/H KZ1000 sidewinder.
3.5x18 laced to a KZ1000 disk hub.
150/60/18 Shinko 006 Podium.
63" wheel base.
The following user(s) said Thank You: KZB2 650

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