De-Goated, H-Pipe Installed - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 8 (permalink) Old 10-18-2011, 10:28 AM Thread Starter
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De-Goated, H-Pipe Installed

Hey all,

I had a local muffler shop fab up a custom H-Pipe for the VN. It turned out pretty well.

See pictures & video below.



The bolt acts as the center stand stop.







Video of bike being fired up. (Watch in HD for better sound.)

I'll upload a video of the bike rolling down the street for a better idea of how it sounds.

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 #2 of 8 (permalink) Old 10-18-2011, 08:10 PM
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Sweet! Nice practical alternative!!
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post #3 of 8 (permalink) Old 10-19-2011, 12:46 AM
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So, just wondering what the toggle switch on your left side cover used for?

"Show me a man who makes no mistakes, and I'll show you a man who doesn't do things." Theodore Roosevelt."

2007 Victory Kingpin
Current projects - 1986 VN750 & 1988 EL250
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post #4 of 8 (permalink) Old 10-19-2011, 09:51 AM Thread Starter
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Quote:
Originally Posted by shark88 View Post
So, just wondering what the toggle switch on your left side cover used for?
No idea. It was there when I bought the bike. I can tell something was spliced into the wiring harnesses at some time. Maybe a switch for a chest heater or something like that?

I should utilize in somehow. hmmm.

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 #5 of 8 (permalink) Old 10-19-2011, 12:37 PM
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I am not a believer in removing the "goats belly" but at least you still have a crossover pipe, which is critical with the stock exhaust IMO. If you still have the goats belly, I would hang onto it. It will sound completely different at high rpm on the highway, my V&H pipes sounded great around town, but liked to drove me bananas on the highway, which is where I spend most of my riding time.

I am a motorcyclist, NOT a biker.


1997 Vulcan 750, purchased about a week ago
2006 Sportster 1200 Low
2013 Royal Enfield Bullet 500, converted to carb
2001 Yamaha XT225, heavily modified
2004 Honda Rebel 250
1979 Vespa P200E
2002 Vulcan 750 parts bike
1994 Yamaha XT225 parts bike
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post #6 of 8 (permalink) Old 10-19-2011, 01:13 PM Thread Starter
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Quote:
Originally Posted by VN750Rider/Jerry View Post
I am not a believer in removing the "goats belly" but at least you still have a crossover pipe, which is critical with the stock exhaust IMO. If you still have the goats belly, I would hang onto it. It will sound completely different at high rpm on the highway, my V&H pipes sounded great around town, but liked to drove me bananas on the highway, which is where I spend most of my riding time.
Even though I'd like to go on a couple long trips a year, most of my miles will likely be around town.

It actually turned out louder than I thought it would, but not obnoxiously so.

I'll hang onto the old unit for the time being.

Does anybody have any information on why the cross-over is so crucial? I've been told/read that it's needed, but when people ask me why I just tell them it equalizes the pressure. I don't really know why that matters.

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 #7 of 8 (permalink) Old 10-22-2011, 12:23 AM
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Since both cylinders don't fire at the same time, but alternately, the crossover allows the exhaust gases from the cylinder that just fired to use both mufflers on the way out. I had V&H pipes, with no crossover, and definitely lost power, though not enough to really matter on the VN750. The goats belly is actually referred to as a power chamber in some places. Aside from being just a pathway to allow exhaust gases from one side to cross over to the other side, it also serves as a resonator, or pre-muffler. It allows use of mufflers with lower back pressure to be used, without excessive noise. The setup you made could not be sold on a new bike, because it would exceed EPA noise levels.

I am a motorcyclist, NOT a biker.


1997 Vulcan 750, purchased about a week ago
2006 Sportster 1200 Low
2013 Royal Enfield Bullet 500, converted to carb
2001 Yamaha XT225, heavily modified
2004 Honda Rebel 250
1979 Vespa P200E
2002 Vulcan 750 parts bike
1994 Yamaha XT225 parts bike
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post #8 of 8 (permalink) Old 10-22-2011, 12:41 AM
If only it had 6th gear..
 
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What's inside the g-belly? Anyone ever bust one open? I thought maybe it had a channel in there that helped equalize the length difference between the pipes. Nice job Roach. I'm keeping the belly on mine cause I like the deeper tone but for anyone looking to do a gastric bypass on their's this is very helpful.

Dave

Mods:
Jetted, shaved & coastered
Home made under-tank single filter
Converted ACCT's to manual (thanks wib714)
Dual vac lines on petcock (my cure for ticking)
LED tail/plate lights
Relocated helmet lock to license plate

Added stuff:
Customized hard bags w/ lights
Chrome levers
Hellcat windscreen
LED running lights
Home made 'Vita-Volt' meter
Foot rests on engine guard
Tunes

Hmm....she was on the back when we left.... ??
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