Twin Plug Head

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22 Jan 2023 12:21 - 22 Jan 2023 13:10 #879163 by tekguy
Twin Plug Head was created by tekguy
Looking for info specific to the 81 twin plug head with integral injection port.. valve sizes, chamber volume, etc.
Last edit: 22 Jan 2023 13:10 by Street Fighter LTD.

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22 Jan 2023 13:49 #879167 by TexasKZ
Replied by TexasKZ on topic Twin Plug Head
I reckon you will have to either ask the guy who made it, or take those measurements yourself.
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

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22 Jan 2023 15:18 - 23 Jan 2023 00:53 #879173 by zed1015
Replied by zed1015 on topic Twin Plug Head
Chamber volume for the stock  B1 injection head is 40cc ( as it is for all 1000J and GPZ1100 heads ) and your head appears to be unskimmed by any significant amount if at all as the lip around the combustion chamber is still intact.
Stock steel valve size would be 31mm inlet , 37mm exhaust.
Current stainless ones may be stock size or oversize.
Also as mentioned elsewhere on FB the B1 is single plug as stock (as are all kz/gpz heads ) and the extra vertical 10mm plug is a modification..
 
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Last edit: 23 Jan 2023 00:53 by zed1015.

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