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Main jet
- Kiddynamite8
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1978 kz650. I'm cleaning up the carbs because it ran like crap, and ultimately just failed to start.
I have 117.5 Main jet. The only mod done to the bike was a vance and hines 4-1 exhaust (previous owner)
Does that jet size sound right? I read that 112.5 was the stock size?
As always, any help is appreciated. Thanks.
1978 KZ650
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- Warren3200gt
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Dont think V & H do but never had one so not 100%. What do your plugs look like?
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- martin_csr
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With the 4-1 & individual pod filters those 2 sizes would be in the ball park. The KZ650.Info site has quite a few carburetor stickies, including a jetting guide The diagrams at Partzilla list 4 sizes for the 1978 KZ650-C2 >> 92.5 to 107.5.
ps: good pic.
...
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- Kiddynamite8
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The bike has the stock airbox.
If this setup would work with pods, that would save the headache of reinstalling!
So do you guys ageee that the 117.5 is too big for the stock airbox and the V&H exhaust?
I'd love to figure out the right combo.
Thanks guys!
1978 KZ650
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- SWest
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- 10 22 2014
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Steve
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- gd4now
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- Denco where did you go?
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1977 KZ650 B1
Pods and Denco header
OLD KAW OWNERS SMILE ALOT
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- Kiddynamite8
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I think I'll try the 110 mains with the 17 pilots and see if that makes things right.
Thank you.
1978 KZ650
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- 650ed
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1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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- SWest
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- Kiddynamite8
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I will listen to the pros!
Also, gonna try running the 102.5 Mains and see what happens.
You guys have no idea how valuable your knowledge is to a noob like myself. THANK YOU.
1978 KZ650
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- hardrockminer
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I have several restored bikes along with a 2006 Goldwing with a sidecar. My wife has a 2019 Suzuki DR 650 for on and off road.
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- 650ed
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hardrockminer wrote: You may want to also consider replacing the needle jets and the jet needles. Most people don't realize that they wear over time. A new set will bring your carburetors back to original function. You can probably buy complete new kits (I like Keyster) from Z1 enterprises.
I guess I'm one of those folks. My bike still has the original Mikuni needle jets and jet needles and with 62,000 miles they still work like they did when the bike was new. Ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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