Cv34 38 pilot jet ???

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18 Oct 2015 13:55 #695097 by objec123
Cv34 38 pilot jet ??? was created by objec123
I keep reading about how the 38 pilot jet can't be found. I have been jetting my cv34s for pods and short exhaust, been thinking of trying this 38 jet. Jetsrus.com has them for 12$ ech. Looking for 38 pilot jet reviews on a kz750 four with pods and short exhaust.

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19 Oct 2015 05:42 - 19 Oct 2015 05:46 #695182 by undiablo
Replied by undiablo on topic Cv34 38 pilot jet ???
They appeared at Jetsrus.com about 4 months ago. Before that, different than #35 slow pilot jets were called unobtanium.
Nonetheless, there is still no report from any user about #38s.
Price might have something to do.

Kawasaki KZ 750/4 LTD 1981
Kawasaki KLR 650 2011
Argentina - Buenos Aires
Last edit: 19 Oct 2015 05:46 by undiablo.

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19 Oct 2015 05:44 #695183 by undiablo
Replied by undiablo on topic Cv34 38 pilot jet ???

Attachment 35slowjetvs-2.jpeg not found


Kawasaki KZ 750/4 LTD 1981
Kawasaki KLR 650 2011
Argentina - Buenos Aires
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02 Nov 2015 06:55 - 02 Nov 2015 06:56 #696883 by objec123
Replied by objec123 on topic Cv34 38 pilot jet ???
i have the 38 jets from jetsrus, the holes are smaller on the 38 than the 35, wtf...

the new 38 jets look right, they do fit but the 3 small holes on the sides of the tube are smaller

Last edit: 02 Nov 2015 06:56 by objec123.
The following user(s) said Thank You: JR, undiablo

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02 Nov 2015 09:00 #696893 by JR
Replied by JR on topic Cv34 38 pilot jet ???

objec123 wrote:
the new 38 jets look right, they do fit but the 3 small holes on the sides of the tube are smaller


Are there 3 holes on each side for a total of 6 ? or just 3 in total ? also jet should be open at the bottom end I would hope that the hole at the threaded end is larger than on the 35. I'm very interested to hear how your bike runs with these and I'm sure undiablo is also. Thanks for the update

1980 kz750E1, Delkevic exhaust
The following user(s) said Thank You: undiablo

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02 Nov 2015 09:45 - 02 Nov 2015 09:52 #696898 by objec123
Replied by objec123 on topic Cv34 38 pilot jet ???
3 holes on each side, same as oem 35, just smaller s28.postimg.org/sqhvqq8bh/jets.jpg

bike idled lean, popping from carbs, sounded very lean. did not ride it. put oem 35s back in.

currenty running 35, 70, 140 with a/f screw 5 turn out. bike runs pretty damn good. pods and short exhaust, cold chicago weather

Last edit: 02 Nov 2015 09:52 by objec123.

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02 Nov 2015 11:06 #696902 by JR
Replied by JR on topic Cv34 38 pilot jet ???
Thanks again objec123 for checking this out. I had same jet combo as you when I had K&N pods and bike ran fine. I put an airbox on for a more stock look and went down on the primary and secondary mains but always wondered if larger pilots would be good for cold starts and warm up
I guess the 38s from jetsrus are different style

1980 kz750E1, Delkevic exhaust

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02 Nov 2015 11:41 #696904 by objec123
Replied by objec123 on topic Cv34 38 pilot jet ???
this is from mike at Jetsrus.com "The hole in the center is what the 35 or 38 refers too. So you should not be able to see much of a difference in the diameter of the center hole. The cross drilled holes in the side are the emulsion holes. When keihin originally made these jets they did have different size cross drilled holes-making it even more confusing- so you could have a 38 with big or little cross drilled holes. "

when i tried the 38s i had a/f srew 2 turn out, and it ran crappy, thought if i had it 5 turns out on the 35s then id go 2 turn out with the bigger 38s, dont know what to think now.

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03 Nov 2015 03:39 #696990 by undiablo
Replied by undiablo on topic Cv34 38 pilot jet ???
Objec123, thanks for your input.
I think you must enlarge the emulsion holes to the same diameter as in OEM #35 jets. Not an easy task with micro drill bit.
Do you have a vernier caliper to measure the emulsion holes o the #38 jets? I will measure the OEM #35 today.

Kawasaki KZ 750/4 LTD 1981
Kawasaki KLR 650 2011
Argentina - Buenos Aires

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03 Nov 2015 04:50 #697001 by SWest
Replied by SWest on topic Cv34 38 pilot jet ???
Making the holes larger will make them leaner.
Steve

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03 Nov 2015 07:01 #697010 by undiablo
Replied by undiablo on topic Cv34 38 pilot jet ???
swest,

bigger holes more air in right?

Kawasaki KZ 750/4 LTD 1981
Kawasaki KLR 650 2011
Argentina - Buenos Aires

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