making your own pipe is probably not the best idea, unless you know what your doing, otherwise you will probably lose a ton of performance

 

I have made several slip ons for the DS and have had very good luck. The hard part is making one quiet enough. I did this because there are no pipes for the DS that meet the 93 DB sound limit at the Oregon dunes.

This is my latest. I used the muffler from a 2008 Honda CBR600RR. Stock the CBR is well over 100HP at the rear wheel so I figured hey why re-invent the wheel and tried it out.




I have found that they tend to run as well as a standard slip on, but are as quiet as stock with a better sound to them.

Here is one that I made for a guy that rides in Oregon, it uses the muffler off of a CBR600F4i and mounts like a stock muffler.



There are several of these running around Oregon due to the sound restrictions at the dunes there. There are no aftermarket pipes that run as well and are in the 93 DB range of stock.

Do not be afraid to make your own, just do a lot of research into it. Really think about what you are wanting and build back from there, do not just start with random parts and hope to have good results.

 

Yea I probably don't know enough about exhaust to go and make my own. ha. I was just trying to get opinions on the best performing and best sounding retail pipe. Is buying the header with the pipe necessary or a waste of money?

 

yo wreckr just buy the full thing if you can a slip on is just the sound more less.

 

Ya, there is a good deal of research involoved, but I know for a fact the one my friend made gained him power. He built the pipe, bought the EFI programmer, built an airbox and also a much larger intake tube, the bike used to wheely in 2nd gear and none higher. with the home made add-ons he's poppin' up in third and decently in fourth...its really impressive.

I'm working on a slip-on setup for my Polaris ranger 500...its a dog in the sand, so I've been working on "re-inventing the wheel" as someone else said before

By the way...the CBR pipe conversions look AWESOME...and thats a hell of a good idea, props

 

The DB requirements, are they measured at idle or at what rpm from what distance?

I really like that CBR600RR muffler adaptation! Did you remove the stock DS airbox?

I have been hopping up every vehicle I have ever owned, hell give my a weedwacker motor and a tooth brush and I will give you some very clean teeth, LOL
Anyways, I have started to use a loop/twin pass design muffler on some very high WHP Honda car engines and the noise reduction is phenomenal, especially at low rpms and added WHP in every portion of the rev range over the typical n1 style fart can mufflers that are very representative of the current slip-on's for the DS. It wouldnt be any lighter than stock, but would be far quieter down low and still be very grunty and have some decent bark up top, plus I would bet it would make more power than the stock muffler everywhere.

 

The check is different for every model as its based on 1/2 the rated max RPM of the engine. So 2000 to 2003 DS650 are tested at 3250rpm and later models at 3375rpm.

This is a summary of the SAE J1287 JUL98 stationary sound test procedure.

Set sound level meter to the
slow dynamic response and the A-weighting network.

Measuring the Vehicle Sound:
Make sure the engine is warmed up and the transmission is in neutral.

1. Hold the sound meter
2. At a 45-degree angle to the exhaust centerline (the normal line of travel)
3. Parallel to the ground
4. 20 inches (0.5 meter) to the rear of the exhaust outlet
5. At the same height as the exhaust outlet

In Oregon the max allowed is 93. Stock DSs tend to run from 92 to 94 DBs. Most of the time if you are tested and are at 96 or lower you are ok.

The CBR600RR muffler sound similar to what you are using on the Hondas. It is a multi chamber loop type. I did remove the air box as I do not ride in mud or water.

 

I definitely don't have the time or know how to build my own exhaust. Although that would be a fun project.

That pipe looks awesome Stir. Nice work.

 

Also, say I decided to go with the Big Gun complete exhaust kit, Headers and pipe. Would I need to do anything else when I install it? Re-Jet it? etc...

 

I didn't but here's the thing i like the gain i got so then i bought the cdi off e-bay and i liked that to. Now I'm going to pick up the Ron woods carb kit!!!!! Then over to Mr. Horsepower for the big bore kit. point is once you start i don't think you will stop I know I'm not!!!! But do what ever you want to do. As far as having to re-jet ect,ect i don't think you have to but then again some1 might know for sure. call big Gun and ask..they should be able to tell you!!!!