De-goat bypass Vs After market - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 12 (permalink) Old 04-10-2012, 01:05 PM Thread Starter
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De-goat bypass Vs After market

Hi! This is my first post here, even though I've been lurking for the last year. I bought an 01 last summer and have definitely enjoyed the bike. My question has to do with the scootworks bypass kit vs after market pipes.

My bike came de-goated and I'm am wondering if I should put the bypass kit on. After reading many posts on this site I can't seem to find a clear answer to whether this is good bad or indifferent in regards to engine care. I've seen posts saying an h pipe is needed, others that say the bypass is great, and others that say its bad for the engine and I should have after market pipes or go stock.

I'm also curious for anyone that has compared the de-goat sound vs the V&H what they thought of the difference. I watched some of the videos of the V&H on youtube which usually shows the pipes on both sides but when i look them for purchase i find them staggered. Any clarification would be great. I wouldn't mind the bike sounding better but im also a little frugal. So if engine care does play any role i will definitely bite the bullet on the after market set but if it doesn't i would only if its going to make an amazing difference in sound/tone.

The previous owner gave me the goats belly but I don't really want to go back to stock due to to the weight and strator issues.

Thanks
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post #2 of 12 (permalink) Old 04-10-2012, 01:10 PM
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do you have any carb issues? if not, leave it as is... the bypass kit leaks, and not worth the cash
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post #3 of 12 (permalink) Old 04-10-2012, 01:23 PM
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Quote:
Originally Posted by oiad View Post
Hi! This is my first post here, even though I've been lurking for the last year. I bought an 01 last summer and have definitely enjoyed the bike. My question has to do with the scootworks bypass kit vs after market pipes.

My bike came de-goated and I'm am wondering if I should put the bypass kit on. After reading many posts on this site I can't seem to find a clear answer to whether this is good bad or indifferent in regards to engine care. I've seen posts saying an h pipe is needed, others that say the bypass is great, and others that say its bad for the engine and I should have after market pipes or go stock.

I'm also curious for anyone that has compared the de-goat sound vs the V&H what they thought of the difference. I watched some of the videos of the V&H on youtube which usually shows the pipes on both sides but when i look them for purchase i find them staggered. Any clarification would be great. I wouldn't mind the bike sounding better but im also a little frugal. So if engine care does play any role i will definitely bite the bullet on the after market set but if it doesn't i would only if its going to make an amazing difference in sound/tone.

The previous owner gave me the goats belly but I don't really want to go back to stock due to to the weight and strator issues.

Thanks
My bike is degoated and now has a welded H pipe. I did not need to rejet. The sound is great, nice low rumble and louder than stock but easy on the ears. The V+H pipes without baffles are louder, the V+H pipes with baffles are quieter. The H pipe produces a more mellow sound than the V+H pipes.

JM2001

" Loud Pipes Risk Rights "

2001 Vulcan 750
marbled
TOC upgrade on ACCT
Air/fuel mixture set to 2 1/2 out
rectifier relocated
splines lubed
iridiums
decals removed
upgraded mirrors
Pic up coil mod done
degoated
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post #4 of 12 (permalink) Old 04-10-2012, 02:12 PM
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I have the v+h pipes on mine and they aren't really staggered. They are loud when you lay on the throttle tho.
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post #5 of 12 (permalink) Old 04-10-2012, 02:23 PM
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I of course recommend either a complete unmodified stock system, or an aftermarket system designed for the bike. Butchering up the stock system puts you in unknown territory, and it may or may not be tunable. Aftermarket pipes have less back pressure, but they are balanced, and rejetting will dial them in properly. On the stock system, the "goats belly" and the baffles are what determine the backpressure, and unless you have some pretty sophisticated equipment, there is no way of knowing what modifications have done. Carbs are only tunable over a fairly narrow range of backpressures, if you go outside that range, it will never run right, and will damage your engine.

It is your choice however. If it is a beater bike, have at it with no worries.

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
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post #6 of 12 (permalink) Old 04-10-2012, 03:46 PM
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Quote:
Originally Posted by oiad View Post
Hi! My bike came de-goated and I'm am wondering if I should put the bypass kit on.
The previous owner gave me the goats belly but I don't really want to go back to stock due to to the weight and strator issues.

Thanks
If it is already de-goated then why are you asking about a bypass kit. Obviously the PO already put one on or am I missing something?

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

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post #7 of 12 (permalink) Old 04-10-2012, 03:54 PM
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If it is already de-goated then why are you asking about a bypass kit. Obviously the PO already put one on or am I missing something?
x2. It you're de-goated then you already have the bypass kit intalled. It may not be made by ScootWorks but it is there.

1986 Black Kawasaki Vulcan VN750 "Black KAWK"
VN750 #9300 & VROC #33453

EMGO Handlebar, V&H Exhaust, Drop Shocks, Raised/Painted Fork, MeanStreak Seat, Tank Bib, ME880 Oversize Tires, Engine Guard, Custom Mirrors, Chris Products Turn Signals, Ear Shave, 150/42 Jets, PINGEL Fuel Valve, MCCT, Volt Meter, Shendegen R/R, AGM Battery, Coastered, .020 Coils, Relo Gauges & Headlamp, SilverStar Ultra, LED Flashing Brake Light, Center Stand Delete, WOLO Airhorn.
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post #8 of 12 (permalink) Old 04-10-2012, 07:53 PM Thread Starter
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The bypass isn't there. The PO just took off the GB and didn't do anything. Just left holes.
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post #9 of 12 (permalink) Old 04-10-2012, 08:32 PM
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put the GB back on and cal lit good.
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post #10 of 12 (permalink) Old 04-10-2012, 09:09 PM
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Originally Posted by oiad View Post
The bypass isn't there. The PO just took off the GB and didn't do anything. Just left holes.
So there aren't any mufflers, just the heads? That must be LOUD!

If your bike has mufflers, then a bypass kit was installed.

Mine goes strait from the heads to the mufflers (bypass), and it sounds/runs good to me. I'm moving to V&H cruisers because I want a little deeper sound, but I really like the sporty sound the bypass gives.

1986 Kawasaki Vulcan 750
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Duralast Gold ETX15 AGM Battery
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TOC MCCTs
Metzeler ME880 [110/90-19, 170/80-15]
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V&H Cruzers
VN750.com Grill Cover
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1990 Kawasaki Vulcan 750

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