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8 Valve Mark
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vm28ss

#1 PostAuthor: 8 Valve Mark » Fri Jan 18, 2019 2:01 pm

i recently bought some pumper carbs which came with no air screws or springs!!!. does anyone know how long they should be?? (screws +springs) probably the same as non-pump vm28 but I'd like to be sure before ending up with wrong ones. cheers in advance.. m

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warren3200gt
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Re: vm28ss

#2 PostAuthor: warren3200gt » Fri Jan 18, 2019 2:26 pm

give the guys at Allens performance a ring to be sure. They will also have the parts you need.
http://www.allensperformance.co.uk/shop/
PUM 488 June 2023
76 Z900A4, 77 Z650B1, 77 KZ650B1, 77 Z1000A1, 82 Z1000J2, ZRX1100R.

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Re: vm28ss

#3 PostAuthor: 8 Valve Mark » Fri Jan 18, 2019 2:48 pm

thanks Warren, I'll check the link, i have possibly sourced some already, but the seller has various lengths. I'm aiming to test run the carbs then possibly fit keyster kits if required. cheers m

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Re: vm28ss

#4 PostAuthor: Ultim8pc » Fri Jan 18, 2019 3:41 pm

Mark,
I've got a set of 28mm pumpers from a 1000. I can check them and let you know if you'd like?
http://www.airevalleyclassics.co.uk
10% discount code Z1OCTEN
Keyster rebuild kits & carburettor spares - airscrews, jets, needles, starter plungers & gaskets.
Also petrol/ethanol proof float bowl gaskets. IMD pistons preferred seller.

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Re: vm28ss

#5 PostAuthor: 8 Valve Mark » Fri Jan 18, 2019 3:54 pm

yes please nigel :lol: the top of the thread to the tip and the spring length would be much appreciated. thank you very large!! mark

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Re: vm28ss

#6 PostAuthor: Ultim8pc » Fri Jan 18, 2019 5:09 pm

The ones fitted seem to be quite a way down the passage way so I'm wondering of not original or correct. However, they came off a running bike which had just been setup on the dyno...
24mm Total length
19mm tip to bottom of thread

I forget to measure thew spring length, but will do.

Hope this helps
http://www.airevalleyclassics.co.uk
10% discount code Z1OCTEN
Keyster rebuild kits & carburettor spares - airscrews, jets, needles, starter plungers & gaskets.
Also petrol/ethanol proof float bowl gaskets. IMD pistons preferred seller.

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Re: vm28ss

#7 PostAuthor: 8 Valve Mark » Fri Jan 18, 2019 5:14 pm

that's great nigel, super rapid too..i hope you counted the turns on yours? :lol: cheers matey. m

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Re: vm28ss

#8 PostAuthor: Ultim8pc » Sun Jan 20, 2019 10:50 pm

8 Valve Mark wrote:that's great nigel, super rapid too..i hope you counted the turns on yours? :lol: cheers matey. m

No worries, I'll need top remember to measure the spring length too..
http://www.airevalleyclassics.co.uk
10% discount code Z1OCTEN
Keyster rebuild kits & carburettor spares - airscrews, jets, needles, starter plungers & gaskets.
Also petrol/ethanol proof float bowl gaskets. IMD pistons preferred seller.

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8 Valve Mark
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Re: vm28ss

#9 PostAuthor: 8 Valve Mark » Mon Jan 21, 2019 1:54 am

no rush mate,re springs; just whenever, if you can be bothered, screws are hopefully not an issue now thanks to your help.. cheers mark.


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