Wrong jet sizes or something else? (Ear shave related) - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 50 (permalink) Old 05-23-2016, 06:40 PM Thread Starter
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Wrong jet sizes or something else? (Ear shave related)

I performed the ear shave procedure months ago but haven't truly taken it out riding...until recently. Long story short: I overjetted due to failure to read correctly and completely. My setup was: 142 main / 42 pilot, 2 needle shims per needle, K&N air filters, V&H Cruzers (de-goated) with Smartpartz quiet baffles and reed valve coasters in place. While throttle response was great, I encountered issues with high fuel consumption and bogging/hesitation often (gee, I wonder why).

After reading more, I came to the conclusion that I overdid it, big time. I then went with 138 main / 38 pilot and only 1 needle shim per needle. The other above options remained in place. Currently, I have carb #1 adjusted at 3.25 turns out and carb #2 at 3 turns out, which according to what I've read so far, is too much.

I went for a ride up Mount Lemmon in Tucson yesterday, and boy was the wind horrible. It seemed to be giving my carburetors forced induction with lots of hesitation, stumbling, followed by a burst of power (very bad). At it's highest point, we were at an elevation of over 8,000 ft. I had a hard time starting the bike when we left the restaurant near the summit. Returning to town (roughly 2,300 ft), the wind persisted and seemed to cause my carbs all kinds of problems. I think I'm back to square 2.

On a side note, the bike takes off like a greasy rocket with no problems, but does not do well with wind. I suppose that's the nature of the beast?

Has everyone that performed the ear shave with individual air filters experienced this issue with either high winds or fast highway speeds? How can I set the record straight?


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post #2 of 50 (permalink) Old 05-23-2016, 07:01 PM
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I'm not earshaved, so don't take it from me, but it sounds like a carb vent issue. I read somewhere else with same issue, and I think carb vents were at fault. Make sure to put it in a location free of winds, like under the gas tank connected to the sender unit.

Don't take my word for it. I'm just a foolish newbie.
When in doubt, just know that I am only joking around.

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post #3 of 50 (permalink) Old 05-23-2016, 07:16 PM
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Quote:
Originally Posted by evulcannibal View Post
I'm not earshaved, so don't take it from me, but it sounds like a carb vent issue. I read somewhere else with same issue, and I think carb vents were at fault. Make sure to put it in a location free of winds, like under the gas tank connected to the sender unit.
X2.I've never had problems in the wind.I'm earshaved with k&n pods,degoated with screaming eagle mufflers at about 1100 feet.140/40 with 2 shims

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lowered with progessive 412 10" shocks
rejetted for K/N Pods part#rc 2340
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post #4 of 50 (permalink) Old 05-23-2016, 07:32 PM
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I am not ear shaved and live at about 3500 ft.
I have read several times that you just need to put the vent hose out of the wind under the seat after an ear shave.

Other guys have said they had problems until they put a breather filter on the end of the hose. YMMV

Gordon

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Purchased May 16, 2008
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post #5 of 50 (permalink) Old 05-23-2016, 08:24 PM
..have a vulcan good day!
 
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x4 !.....

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post #6 of 50 (permalink) Old 05-23-2016, 08:43 PM
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x5,but I will add, under the seat is not always a good place.. had my vent hose there at first, and it was horrible. tied it up under the tank (top side of frame rail) and no more issues

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post #7 of 50 (permalink) Old 05-23-2016, 10:16 PM
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I put mine right on the gas tank sender

ONE RATS ASS GIVEN PER POST
Support your local FREEBIRDS MC
1986/5 Vn700/750 Frankenfook cross eyed bitch "Mellisa Fayhe"
I am a BIKER and i'm proud.FREEBIRDS MC CENTRAL NY

lowered with progessive 412 10" shocks
rejetted for K/N Pods part#rc 2340
sportster seat

'I didn't lose my mind.i gave it away

BRING BACK WOLFIE."Peace and Carrots"RIP
"And I'm free...as a bird"John Lennon Free as a Bird
"I only carry when I have my pants on"Joe Robinson RIP aka Old Dog
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post #8 of 50 (permalink) Old 05-24-2016, 03:53 PM Thread Starter
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Yikes! As soon as I read the responses, I knew what I had done wrong. First, when I rejetted a second time to smaller sizes, I replaced the vent hoses with clear fuel line which is fine, but I ran the lines too far down. You know those two holes on the frame near where you install the rear bolt on the fuel tank? Yeah, I ran them through that area and they're nearly touching the rear cylinder coil pack (too long).

Secondly, since both side panels are off due to repainting, I'm guessing the wind was able to interfere directly with the vent lines thus causing a disturbance.

I'll take the sound advice and trim the vent lines and re-position under the tank.

Thanks for all the responses guys!
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post #9 of 50 (permalink) Old 05-24-2016, 05:49 PM
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length may not be an issue, but position definately is

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post #10 of 50 (permalink) Old 05-24-2016, 06:34 PM
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Quote:
Originally Posted by michiganteddybear View Post
length may not be an issue, but position definately is
Wish the ladies saw it that way too.

Don't take my word for it. I'm just a foolish newbie.
When in doubt, just know that I am only joking around.

95 VN750
Top speed is 112 mph at ~7900 rpm
Blacked out engine
Dry rusty splines finally lubed for the first time
R/R relocated to the side of fuse box
Rust removed from tank
Marbled
In line fuel filter, 23-28 micron rating
Voltmeter
Gear indicator
LED turn signals & brake light
16 color LED engine light up & underglow
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