Simple question!

  • jafilson
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Simple question!

25 Apr 2008 10:57
#209027
How does the fuel tank vent? It seems sealed up to me.
(1981 KZ650 CSR) Just curious?
1981 KZ650H1 MFG 1/81 9966 Miles
Keihin vacuum piston carbs. 4 in 1 exhaust.
Pekin, IL

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  • bountyhunter
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Re: Simple question!

25 Apr 2008 11:30 - 25 Apr 2008 11:33
#209042
jafilson wrote:
How does the fuel tank vent? It seems sealed up to me.
(1981 KZ650 CSR) Just curious?

There's a small hole in the gasket that seals the cap on top. You won't believe how long it takes to remember that when it gets plugged with crud and you keep running out of gas from the vacuum lock.....:laugh:
1979 KZ-750 Twin
Last edit: 25 Apr 2008 11:33 by bountyhunter.

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  • vach
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Re: Simple question!

25 Apr 2008 12:50
#209058
how can you tell if your gascap is sealing correctly?
1979 kz650 B. Chicago, Illinois

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Re: Simple question!

27 Apr 2008 16:25
#209597
Thanks! I still couldn't see a hole but I'll keep looking!
1981 KZ650H1 MFG 1/81 9966 Miles
Keihin vacuum piston carbs. 4 in 1 exhaust.
Pekin, IL

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  • rdgrnr
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Re: Simple question!

27 Apr 2008 17:02
#209602
vach wrote:
how can you tell if your gascap is sealing correctly?
Kevin,
You should be able to feel the spring pressure when you close the tank. And check your cover gasket for cracks and breaks. I couldn't figure out why I kept smelling gas when I couldn't find a leak anywhere. Turned out the cap gasket was cracked, and gas was evaporating out the cap.:blink:
77 KZ650B1
80 440 LTD Sold
78 GL1000 Naked Wing Sold
80 CM400E Sold
Brainerd, MN

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  • bill_wilcox100
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Re: Simple question!

27 Apr 2008 18:11
#209616
For your 1981 KZ650 CSR the gas tank seal goes for about $5 new.

Z1 Link:

www.z1enterprises.com/detail.aspx?ID=1906

It works fine (don't ask).

Best of success. :)
1977 KZ650-B1 (Stock)
Upgrades:
- Dyna S Electronic Ignition (DS2-2)
- Dyna 3 Ohm Coils (DC1-1)
- Coil Repowering Mod
- Progressive Springs Front & Rear
- Saddlemen Seat Cover
- New Metallic Red Re-Paint & Repro Badges.
Montreal, Canada

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