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76 KZ900 Carb Vent Routing 03 Jul 2020 06:31 #829677

  • mrmach5
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Question, There are two carb vent nipples one on #2 and one on #4 carb. Anyone know the correct routing for the vent tubes. I'm thinking they should vent high well above the carbs ?
Thanks for any info.

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76 KZ900 Carb Vent Routing 03 Jul 2020 06:41 #829678

  • slmjim+Z1BEBE
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On Z1's, we terminate them one on each side between the frame rails under the tank and the main backbone, just in front of the gusset where the backbone joins the two upper side rails.

Later Z1's have an oval cutout in said gusset sized just right for the vent hoses. There's been some discussion as to the real intent of that oval hole. We still prefer to terminate the hoses directly under the tank as described above for (perhaps) better protection from water incursion.

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slmjim & Z1BEBE
A biker looks at your engine and chrome.
A Rider looks at your odometer and tags.

1972 Z1 x2
1974 Z1-A x2
1975 Z1-B x2
1993 CB 750 Nighthawk x2
2009 ST1300A

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76 KZ900 Carb Vent Routing 03 Jul 2020 11:00 #829691

  • Mikaw
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1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.
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76 KZ900 Carb Vent Routing 03 Jul 2020 11:45 #829695

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Perfect,
Thank you!

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76 KZ900 Carb Vent Routing 03 Jul 2020 11:57 #829697

  • Mikaw
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I have referenced pictures on the bike several times... it’s a beautiful example... The person that bought it joined the site but currently can’t find his post sale thread...

kzrider.com/forum/23-for-sale/610515-197...a4-fore-sale?start=0
1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.

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76 KZ900 Carb Vent Routing 06 Jul 2020 11:33 #829937

  • Mikaw
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Follow up, need advice from experts. Doesn’t the vent hose route through the oval hole shown at red arrow

1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.
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76 KZ900 Carb Vent Routing 07 Jul 2020 10:16 #830017

  • krazee1
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I'm quite sure the factory routing was as your two photos depict, through the oval in the frame gusset and secured in the clamps in the air filter cover.

Disclaimer: LONG time ago that I did "factory routing" Mike
Former M.E. at Kawasaki Motors Manufacturing, Lincoln, NE
1966 W1 (the Z1 of 1966-50H.P. and 100mph!)
1974 Z1
1978 KZ1000 LTD
1976 KZ900B pile O parts
1980 KZ750E
1980 Honda XL250S (I know, wrong flavor!)
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