Earshave Without Coasters - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 2 (permalink) Old 12-03-2018, 04:31 PM Thread Starter
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Question Earshave Without Coasters

I'm working on the earshave on my bike.
I'm following this procedure with one exception.
I want to keep the stock reed valves, because I like the popping on decel.

The separator VALVE,AIR SWITCH has one vacuum hose, two hoses that go to the cylinders, and one hose that went to the surge tank.
How critical is it that this intake hose is filtered air?
Can I leave it open, or is that just asking for trouble?

Would a Emgo filter have sufficient flow with it's 3/8" output when the air hoses are 3/4"?
3/4" is 4 times the area of 3/8".

Or is there a better solution for this?


'89 VN750 Bought stock 4/12/18 @ 17805.9 miles $800. Wrecked once. 27454.5+ miles

Completed modifications:
Removed mufflers, straight pipes out of GB. 110/90 Front Tire. Pick-up coil mod. Shindengen MOSFET FH020AA r/r. USB Outlet + Voltmeter. Repainted Metallic Blue w/ new tank bages. Ear Shave (wo/ coasters) 40/140 NO shims 45MPG. MCCT conversion.

Planned modifications:
Custom LED turn signals. Windshield. Highway Pegs. (Possible) ignition adv. Tuxedo Mod. Ignition coil mod.
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post #2 of 2 (permalink) Old 12-03-2018, 05:14 PM
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Filter will probably flow enough, it's not a huge volume of air at all. Make a spitting noise against the back of your hand, it's about that much inside each head. Without filter, there's a chance of dirt/moisture passing through the head port.

You could probably coaster and maintain the pop by adjusting the air screws inward. Haven't touched my air screws and it doesn't pop. Another way might be disabling the coast enrichers, mine did pop right after the mods, and I think it was the enrichers being stuck. A day with seafoam stopped the popping. Less rubber spaghetti with coasters.

On mine, coastered and shaved, if I open the vacuum port on the left carb during long decels, it goes off like a cannon, but just one time. Loud enough to possibly split a muffler.
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2003-21k mi
Shaved w/UniPK92+Stock Jets-TPE/MOSFET-Shinko Tires-AGM batt-bags-chrome-LEDs...more
__________________________________________________ ____________
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Owner's Manual: http://www.mediafire.com/file/nscb5f...ers+Manual.pdf
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