Bent needle

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25 Oct 2011 02:04 #485202 by bloglos
Bent needle was created by bloglos
I'm rebuilding the carbs on my C2 and I just noticed that the needle on number 1 is bend. I would have assumed that this would have effected performance or something but I never noticed anything out of the ordinary, plugs looked good as well.

Should I be concerned? Wouldn't this effect the vacuum on carb 1? Should I try to bend it straight?


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78 KZ650 C2 - Runner
77 KZ650 B1 - Project
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  • TeK9iNe
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25 Oct 2011 21:14 #485340 by TeK9iNe
Replied by TeK9iNe on topic Bent needle
If your going to bend it heat it up some first. Not red hot, just enough to make it soft.

If you look down the carb bores, you probly never get to that portion of the needle. If it runs great in the high rpm/full throttle range, then leave it.

B)

Motorcycle Shop Owner/Operator

79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
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25 Oct 2011 21:25 #485344 by 650ed
Replied by 650ed on topic Bent needle
I don't know how it happened. The sign on the motorcycle shop door said "Our experienced carb technicians will give you more bang for the buck." :unsure:

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1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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  • Motor Head
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25 Oct 2011 21:36 - 27 Oct 2011 21:48 #485350 by Motor Head
Replied by Motor Head on topic Bent needle
Recommend you get another needle. Also it very well may have worn your Needle Jet. At the cost of these 2 parts new you can get a K&L carb kit. It should have both, and float needle & Seat, new mixture screw and gaskets/ O-rings.
www.z1enterprises.com/Carburetor-Rebuild...KZ650-197779-42.aspx

Sorry no Needle Jet in this kit, only the Jet Needle.

1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...
Last edit: 27 Oct 2011 21:48 by Motor Head.

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26 Oct 2011 15:04 #485461 by bloglos
Replied by bloglos on topic Bent needle

650ed wrote: I don't know how it happened. The sign on the motorcycle shop door said "Our experienced carb technicians will give you more bang for the buck." :unsure:

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I can't imagine the person that bend it and thought it would be fine to just run it that way anyway.

78 KZ650 C2 - Runner
77 KZ650 B1 - Project

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26 Oct 2011 15:06 #485463 by bloglos
Replied by bloglos on topic Bent needle

Motor Head wrote: Recommend you get another needle. Also it very well may have worn your main jet. At the cost of these 2 parts new you can get a K&L carb kit. It should have both, and float needle & Seat, new mixture screw and gaskets/ O-rings.
www.z1enterprises.com/Carburetor-Rebuild...KZ650-197779-42.aspx


Hmm, I thought about the kit, but I ended up ordering a new NOS needle off ebay. I've heard the quality of the parts in the kits (ie the needle) is not as good as the Kawi part. That being said, I never even thought of have a look at the main jet to check for damage or wear.

Would the wear be on the Main jet stem? Or the Main jet itself?

78 KZ650 C2 - Runner
77 KZ650 B1 - Project

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27 Oct 2011 21:46 #485694 by Motor Head
Replied by Motor Head on topic Bent needle
Actually the wear would be in the needle jet, as this is where the needle rides. Not the Main Jet, it is below the needle. So it would not come in the kit, my mistake for thinking it would.
I don't think any of the carb kits come with the Needle Jet. Probably hard to tell if it is worn from the Bent Jet Needle.

1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...

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