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post #1 of 56 (permalink) Old 04-22-2011, 11:21 PM Thread Starter
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other exhaust pipes

I am trying to find a set of cheap aftermarket pipes, any suggestions? I have heard of people using Harley exhaust for our bikes, any list of which ones fit? I have a 91 vn 750.
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post #2 of 56 (permalink) Old 04-23-2011, 12:13 AM
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Quote:
Originally Posted by Blue Buddha View Post
I am trying to find a set of cheap aftermarket pipes, any suggestions? I have heard of people using Harley exhaust for our bikes, any list of which ones fit? I have a 91 vn 750.
Not Harley pipes, that I'm aware of, but Harley mufflers; some have replaced the stock mufflers with H-D Dyna mufflers bought cheap off eBay, or take-offs bought cheap at a Harley dealer. There's a couple write-ups in the Files section of the Yahoo group; prolly one or two on here somewhere.

Wouldn't work on mine with the Scootworks bypass kit, which means it prolly won't work with the goat's belly in place. The mufflers hit the final drive at the lower shock mounts.

YMMV

Jim

J.D.
Kerrville, TX
'95 Vulcan 750 "Therapy II",
aka "Raggedy Ann"
'95 VN750 project
'03 VN800B "The Little Black"
'04 VN800E Drifter project
'93 VN1500A custom project
VROC #16185
GCVROC #33

Photo album: http://www.flickr.com/photos/leekayd/sets
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post #3 of 56 (permalink) Old 04-23-2011, 12:42 AM
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Copied from Yahoo Groups.

NOTE: This is just a description of how I installed MY mufflers. It should give an idea of how to do it yourself. This is only based on my skill level and my resources. You will see the problems I had and I hope you can learn from them. When I say left or right it is from the view point of as if you were sitting on the bike looking forward. I have done this mod twice now and have edited this write up with the changes I did for the second time to help with the problems I had the first time.

The first question is "where do you get H-D dyna mufflers from"? A lot of Harley guys change their mufflers out before the bike even hits the steets. So your chance of getting a new pair at a low price is very good. You can call your local shop and see if they have any laying around that they want to get rid of. I got my mufflers off of ebay. This is another way they get rid of there mufflers. You can easily get a pair for less then $30 off of ebay.

Once you get your mufflers it's time to go shopping. Here was my list:
THESE CAN BE BOUGHT AT ANY PARTS STORE

1- 1 3/4" O.D. straight pipe (about 4" long)

2- 1 3/4" U-clamp

1- 1 3/4" flexible exhaust kit (the kit should come with another U-clamp included. If not you will need to buy another U-clamp)

Muffler Bandage and tail pipe repair- (at Autozone) Victor- part # V805

NOTE: Some have used Hi-temp silicone instead of muffler bandage.

THESE CAN BE BOUGHT AT HOME DEPOT

4- 5/16" carriage bolts

4- 5/16" lock nuts

Stock metal to make your muffler mount brackets (what you use is up to your skill level and resorces)

Now let's begin the mod!

First remove the stock mufflers and premuffler (goats belly)

Save two of the stock muffler clamps for later.

Take one of the dyna mufflers and slip it over the left header pipe. Use a jack with a pad or a box or whatever you can find and put it under the muffler to get it level. Install the heat shield and see how it looks and adjust the muffler to the desired level. Now measure the distance from the stock exhaust mount on the bike to the slot mount of the muffler. Use your imagination and make a muffler mount now. I used diamond plate I had laying around my garage.

NOTE: If you are planning on relocating your R/R you can make your mount extent up beyond the the bike mount and mount your R/R to the same bracket later.

Using your measurement, drill three holes in your mount bracket. One for the upper mount to the bike and two for the muffler mount. Use two of the carriage bolts and lock nuts and mount your bracket to the muffler then use the stock bolt and nut and mount the muffler to the bike. Install the heat shield now and see how it looks. If you need to adjust the level you can alway elongate the bracket holes to get the right level.

Now remove the muffler and bracket and make a simular bracket for the other side.

Let's install the left muffler now. Get the exhaust tape and a hair dryer. Use the instructions and wrap the left header pipe a couple time. Now mount the left muffler and use a U-clamp to attach the muffler to the header pipe. Make sure you face the threads of the U-clamp in the direction so it won't interfere with the mounting of heat shield once it's put on. Mount the heat shield. (you may or may not be able to use the rear heat shield mount.on the first set I couldn't but on the second set I could) The left side is now done.

Let's move to the right side. Use the mounting bracket you already made for this side and mount the muffler to the bike using the other two carriage bolts and lock nuts at the muffler and the stock bolt and nut to the bike. Check and compare the two mufflers now to see that they are at the same level and match as far as looking the same. Make any adjustments now to the right mount.

Here is the tricky part. You will see there is a 6-8 inch gap between the muffler and the header pipe and the muffler won't be on a straight line from the header. This is why you need the flexible exhaust tubing. To fill the gap and make the slight bend. Cut the flexible tubing to the right length.

The problem I had now was that the flexible tubing and the muffler inlet are the same size 1 3/4 I.D. To get the tubing over the muffler inlet I cut one slit on the end of the tubing about an inch length wise down the tube to expand the "mouth" of the tubing to fit over the muffler inlet. This problem was not expected so this was my way of fixing something I hadn't planned. You may want to try a different size tubing.

Using the muffler tape the same way you did on the left side, wrap it a couple times on the end of the header pipe and the muffler inlet (outside).

Install the tube over the header. Use a U-clamp and mount the tubing to the muffler. If you put a slit in the tubing end like I did, make sure the slit is on the outside (to the rear) of the clamp to prevent leaks.

NOTE: THE SECOND TIME I INSTALLED DYNA MUFFLERS I USED THE 1 3/4" O.D. STRAIGHT PIPE TO CONNECT THE MUFFLER TO THE FLEX TUBING. THIS ALLOWED FOR A BETTER CONNECTION WITHOUT HAVING TO CUT THE FLEX TUBING. I USED 1 U-CLAMP FOR THE MUFFLER AND 1 U-CLAMP FOR THE FLEX TUBING. I HAD NO PROBLEM GETTING THE HEAT SHIELD ON WITH BOTH CLAMPS IN PLACE.

Since the header pipe sits so close to the frame it is impossible to fit a U-clamp in that area and get the heat shield on.


The stock clamps are too big to get a tight fit on the header pipe so you will need to use two of them. One as a shim and one as a clamp. Cut the ends off one of the clamps to make a shim the shape of a "C". Now put the shim over the flex tube at the header pipe and the clamp over it. Tighten the clamp to get a tight fit. Put the heat shield on and you should be done with the mod. and can see how it looks. You aren't done completely yet though.

Take the heat shields off and start the bike up. Let it run for about ten minutes. While it is running check for any leaks. You may have to just tighten your clamps up to stop them. The heat from the bike will also heat up the exhaust tape to harden it. That will be what you smell. If you find any leaks you can wait for the exhaust to cool then use high temp silicone to seal the leaks. (Use as directed)

Once you have all the leaks sealed, put the heat shields back on and enjoy! You will find it to be a good deep rumble sound.

After each of the first few rides keep checking all the clamps and bolts. They will loosing on you and you want to keep them tight. Also keep checking for leaks at this time.

I hope this has helped out. If you have any more questions feel free to ask me or any of the others that have done this mod.

Warren D.

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 #4 of 56 (permalink) Old 04-23-2011, 09:11 AM
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Or buy the one from scootworks for 65 bucks.

http://www.shopscootworks.com/produc...cts=premuffler bypass
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post #5 of 56 (permalink) Old 04-23-2011, 09:29 AM
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one of the greatest exhaust sound set-ups I have ever heard using Harley mufflers on a Vulcan 750 .....was using Softail mufflers and removing the goats belly and replacing it with a straight crosspipe......Sounds awesome.....the sound clip is on Youtube. Check it out. posted by :carlb1058 '86 Kawasaki vn750 Vulcan.

Last edited by BRET H; 04-23-2011 at 09:41 AM.
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post #6 of 56 (permalink) Old 04-23-2011, 09:52 AM
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Quote:
Originally Posted by BRET H View Post
one of the greatest exhaust sound set-ups I have ever heard using Harley mufflers on a Vulcan 750 .....was using Softail mufflers and removing the goats belly and replacing it with a straight crosspipe......Sounds awesome.....the sound clip is on Youtube. Check it out. posted by :carlb1058 '86 Kawasaki vn750 Vulcan.

http://www.youtube.com/watch?v=ckK9oqLQ_ws


Doesn't sound much differet than with the stock mufflers?

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 #7 of 56 (permalink) Old 04-24-2011, 12:29 AM
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Yeah...Yeah...... That's the link.......Yes.....I will give you that .....but they do give that bike a more Harley sound than stock. I wonder what it would sound like with no straight crossover pipe, you know being true duals......Now everybody is entitled to there opinion. Youtube ...."Big Dave's new exhaust on 750 Vulcan", These are the full head back complete MAC exhaust system for our bikes. I honestly think that if your trying to get your bike to sound like a 15 year old Craftsman 2 stroke weed eater......These are what you want....I would have been very unhappy with the sound of these....I honestly expected so much better of a sound. For complete exhaust systems for our bikes.....Vance & Hines Cruzers(I have these) are the way to go......or if you can find a set of Jardine exhaust on E-Bay for our bikes(discontinued in '07)....they sound great too.! If your going the cheaper route with slip-ons and a goat removal......the possibilities are endless. There are many good combo's.....cobra slip-ons are nice.......I just think any slip-on set-up with removing the goat's belly with NO crossover pipe would be the best way to go.

Last edited by BRET H; 04-24-2011 at 07:25 AM.
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post #8 of 56 (permalink) Old 04-24-2011, 03:20 AM
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I don't like the sounds of the MAC's at all. It does sound like a pissed off weed eater.
I have a set of Fat Boy slip ons off of an 02 Harley, but they have a catalyst in them, and they are pretty quiet. Too quiet for me, so I'm going to see if I can gut them and get a little better sound out of them.
I want to go to true duals with them, but I don't know with the different lengths of exhaust pipe will screw with the carbs or not, or change the exhaust pressure much or lean one cylinder out more than the other one.
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post #9 of 56 (permalink) Old 04-24-2011, 09:40 AM
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I made 1 5/8 shotgun pipes straight back on right and the left pipe comes over to the right and straight back as well... very loud, love it, sounds like my harley pictures in my profile of finished product

Just can't leave well enough alone...

86 vn750
Ears Shaved
Custom Exhaust
Custom Seat
Hardtail 3 1/2" drop rear
Custom turn signals
15" apes
Custom grips
Custom forward controls
Custom paint
many more mods to come

Last edited by Mike23Impala; 04-25-2011 at 12:26 PM.
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post #10 of 56 (permalink) Old 05-11-2011, 05:40 PM Thread Starter
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I love the way your 86 looks Mike, but how hard are they to make, and how much did it cost?
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