K&N Filters - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 19 (permalink) Old 05-15-2012, 01:11 PM Thread Starter
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K&N Filters

I put the K&N filters on when I got my bike back together. I'm noticing now that I'm getting about 25 miles less out of each tank of gas. Was I supposed to make any sort of carb modifications using these?



Pete Herrmann
1994 Vulcan 750 40K on the clock and counting....

Bought 4/2011 28k Miles,
New Rick's Motorsports R/R
Tim Parrot Stator
Tuxedo Mod
KAW Saddlebag/signal relocation brackets
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post #2 of 19 (permalink) Old 05-15-2012, 01:45 PM
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Yeah, you'll need to change the jetting, shim the needles, and adjust the tuning.

Search for "Ear Shave" on here to find lots of info on the process.

This is the kit I used. Warning, Factory Pro's website is terrible.


Here's a link to the verses Ear Shave Page


Edit: I just searched for the product number and found these two sites that sell it. They look to be cheaper and more user friendly than that Factory Pro one.
Amazon
StarCycle

Street
1985 VN750 Acquired Feb, 2011 - 13,676km
Mods - Ear Shave, Pickup Coil Gap, Drilled Clutch Basket, Shift Tie Rod, Mosfet R/R, MF Battery, De-Goated (H-Pipe), MCCT, Heated Grips, Plexistar 2 Windshield

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2004 KTM SX 125 - 1979 Can-Am Qualifier 250 - 1971 Kawasaki F6

Video Tutorials - Engine Rebuild - Fork Seal Replacement - Grease Swing Arm Bearings - Carb Rebuild - Spline Lube - Refilling Rear Shocks - Grease Steering Bearings

Last edited by Roach; 05-15-2012 at 01:49 PM.
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post #3 of 19 (permalink) Old 05-15-2012, 01:55 PM Thread Starter
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Quote:
Originally Posted by Roach View Post
Yeah, you'll need to change the jetting, shim the needles, and adjust the tuning.

Search for "Ear Shave" on here to find lots of info on the process.

This is the kit I used. Warning, Factory Pro's website is terrible.


Here's a link to the verses Ear Shave Page


Edit: I just searched for the product number and found these two sites that sell it. They look to be cheaper and more user friendly than that Factory Pro one.
Amazon
StarCycle
Is what I did considered an ear shave? I still have the ears, I just put K&M filters in place of the stock foam ones.....



Pete Herrmann
1994 Vulcan 750 40K on the clock and counting....

Bought 4/2011 28k Miles,
New Rick's Motorsports R/R
Tim Parrot Stator
Tuxedo Mod
KAW Saddlebag/signal relocation brackets
NGK Iridium Plugs
TOC MCCT's
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post #4 of 19 (permalink) Old 05-15-2012, 02:05 PM
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No you are still running stock
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post #5 of 19 (permalink) Old 05-15-2012, 02:16 PM Thread Starter
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Quote:
Originally Posted by Swagman View Post
No you are still running stock

So I don't need to make any other modifications? Don't get why my milage is worse now...



Pete Herrmann
1994 Vulcan 750 40K on the clock and counting....

Bought 4/2011 28k Miles,
New Rick's Motorsports R/R
Tim Parrot Stator
Tuxedo Mod
KAW Saddlebag/signal relocation brackets
NGK Iridium Plugs
TOC MCCT's
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post #6 of 19 (permalink) Old 05-15-2012, 02:17 PM
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Quote:
Originally Posted by peterherrm View Post
Is what I did considered an ear shave? I still have the ears, I just put K&M filters in place of the stock foam ones.....
That is not considered an ear-shave. They technically shouldn't affect your MPG that much, but they could be allowing more air through which is affecting it.

1986 Kawasaki Vulcan 750
NGK Iridium Plugs #7803/DPR7EIX-9
Duralast Gold ETX15 AGM Battery
Coastered & Shaved
TOC MCCTs
Metzeler ME880 [110/90-19, 170/80-15]
Balance Dampers Replaced
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Rebuilt Forks w/ Progressive Springs
V&H Cruzers
VN750.com Grill Cover
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1990 Kawasaki Vulcan 750

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post #7 of 19 (permalink) Old 05-15-2012, 03:15 PM
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Quote:
Originally Posted by peterherrm View Post
Is what I did considered an ear shave? I still have the ears, I just put K&M filters in place of the stock foam ones.....
Whoops, I miss understood.

That's weird then. I suppose more airflow would require some adjustment. Maybe do a carb sync.

Street
1985 VN750 Acquired Feb, 2011 - 13,676km
Mods - Ear Shave, Pickup Coil Gap, Drilled Clutch Basket, Shift Tie Rod, Mosfet R/R, MF Battery, De-Goated (H-Pipe), MCCT, Heated Grips, Plexistar 2 Windshield

Dirt
2004 KTM SX 125 - 1979 Can-Am Qualifier 250 - 1971 Kawasaki F6

Video Tutorials - Engine Rebuild - Fork Seal Replacement - Grease Swing Arm Bearings - Carb Rebuild - Spline Lube - Refilling Rear Shocks - Grease Steering Bearings
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post #8 of 19 (permalink) Old 05-15-2012, 03:36 PM Thread Starter
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Quote:
Originally Posted by Roach View Post
Whoops, I miss understood.

That's weird then. I suppose more airflow would require some adjustment. Maybe do a carb sync.
Sorry, guess I was a little vague, there's a lot of different kind of K&N filters...

I'll put the stock ones back in and see if there's any change...



Pete Herrmann
1994 Vulcan 750 40K on the clock and counting....

Bought 4/2011 28k Miles,
New Rick's Motorsports R/R
Tim Parrot Stator
Tuxedo Mod
KAW Saddlebag/signal relocation brackets
NGK Iridium Plugs
TOC MCCT's
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post #9 of 19 (permalink) Old 05-15-2012, 03:45 PM
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The K&N filters need to be oiled too right ?

~~C8>
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post #10 of 19 (permalink) Old 05-15-2012, 03:47 PM
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How far out have you got the idle screws, is she running to rich, check the plugs and see if they are burning clean, if it is rich then you will use more fuel.
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