H-vix valve and air box flapper
 

Has anyone gutted the h-vix valve in the mid pipe and remove the airbox flapper? what where results if you have?

RE: H-vix valve and air box flapper
 

I ended up with a slight flat spot just off of idle, and the idle got a little rough. I still have to reprogram the power commander to take care of that, which will be a pain, have to go and set up an appt to put it on the dyno. Other than that I haven't noticed any performance gains at all.

RE: H-vix valve and air box flapper
 

Gut the air box and remove the snorkels, install race air filter and new plugs (if not already) install PCIII, -1 tooth on counter sprocket, DYNO it and leave the HTEV alone.

RE: H-vix valve and air box flapper
 

same with mine but i did notice a little gain in the mids still have to get to the dyno. i just removed the cables and safty wired the valve at full open see pics

Attachment 65482
Attachment 65483

RE: H-vix valve and air box flapper
 

Yhea I've removed the Flapper asembly, cables, and installed a BMC race filter. I'm still thinking about removing the snorkels though?? I also removed the exhaust valve and replaced it with a Hass type eliminator that I made at work. Still gotta cut the Micron pipe down about 6in. And the PC IIIr should be here tomarrow according to UPS. I'll let you know when I get her fired up. Still searching for a decent map, may go with a tweeked version of the 110-005 map on dynojets web site till spring. Oh yhea forgot about the PAIR block-offs. Did them too.

RE: H-vix valve and air box flapper
 

what does removing the snorkles help??? (still new to the sport bike thing) i just installed my powercommander III need to update map. and tweek.... about how much does a dyno tune cost est??

RE: H-vix valve and air box flapper
 

$250 around here. Still waitin on the income tax to get that done.

RE: H-vix valve and air box flapper
 

let us know how the tuning goes with the snorkles, and flapper removed....

Check out this site directly from Honda. This confirms the reasoning for the flapper and HTEV are environmental for noise reduction.

Honda Worldwide | Noise Reduction

i have the hvix removed, but the flapper is still there and hooked to the cables, and so are the snorkels.. should i remove them?