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Old 02-14-2011, 09:43 PM   #16
ER70S-2
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More on Polishing Exhaust Header

http://www.advrider.com/forums/showt...117546&page=50
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"BTW, I don't do style. It's a dirt bike, not some girlie dress-up thing." -
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Old 03-19-2011, 06:12 PM   #17
B1
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GSXR1000 pipe on the DR650SE

i've put together a comprehensive post about this mod here.

the pic below is a GSXR1000 pipe 2003 can on my dr650.
click on the photo below a slideshow showing the flange, stainless steel mid pipe, brackets etc.



impressions? saved a huge amount of weight and it looks much better than the standard pipe. its got the suzuki markings so little chance the cops would hassle you about it. its not much louder than stock but has a beautiful deep note.

definitely is less restrictive, can feel a definite improvement in low and mid range power now - there's a dyno chart showing gsxr versus stock and FMF pipes. only decrease in power is the final 500rpm, but how often are you going to be flat lining your DR? this pipe makes a world of difference in the revs you'll be using 98% of the time.

B1 screwed with this post 06-13-2011 at 04:10 PM Reason: posted a more comprehensive thread about this mod elsewhere
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Old 04-02-2011, 10:54 AM   #18
ER70S-2
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Backfiring on Deceleration with Aftermarket Exhaust

Thanks to Lex:
http://www.advrider.com/forums/showp...ostcount=46811
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Quote:
Originally Posted by Threewheelbonnie View Post
"BTW, I don't do style. It's a dirt bike, not some girlie dress-up thing." -
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Old 04-04-2011, 11:42 AM   #19
JagLite
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Question Sparky?

It is my understanding that ALL street bike stock mufflers ARE spark arrestor equipped. It is only offroad vehicles that may or may not come stock with a spark arrestor. And only offroad (meaning not meant to be licensed for street use) will have the muffler stamped that it is a spark arrestor.

A spark arrestor may be an indirect flow type or a fine screen type.
The indirect flow (Krizman patent) just means any burning material cannot go straight out the pipe. Instead of a straight-through design muffler there are a variety of ways to make it low (to none) restriction by offsetting a tube inside. That is how the Suzuki GSXR mufflers work. There are no baffles and just a very thin layer of sound deadener on the inside of the can itself, and two tubes that overlap each other which means any burning particles will hit the inside of the end cap while the gas swirls around and goes out the outlet tube. The muffler itself is light because there is next to nothing inside it! Just a very good use of sound wave modification.

The old standby test performed by Rangers and others with ticket books, was to see if they could insert a stick or similar long thin object into the muffler and have it go in past the muffler showing it was "straight-through" and therefore NOT a spark arrestor type. I don't know if they still test in this way or not. They may only look for it stamped on the muffler itself now.

Anyone else have more info on this?
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Old 04-04-2011, 12:01 PM   #20
plugeye
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wow, that makes sense.
who's to say you cant ride a factory-stock street bike in the woods?
its not stamped "for street-use only"... is it?
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Old 05-05-2011, 09:20 PM   #21
thepostmanpat
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1990-95 exhaust mods?

great thread, thanks. any suggestions for mods on the 'older' DR? i just picked up a 94' and would really like to ditch the stock one.
thanks
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Old 05-05-2011, 09:43 PM   #22
thealien
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[QUOTE=Krusty ...;14465581]

Please share your exhaust improvements...


Full Staintune system - had one for 4 years and they even replaced the muffler for me when I sent it back for repacking - now that's what I call service!
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Old 05-09-2011, 01:43 PM   #23
GISdood
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Stock header, but the big glob-tastic chunk of weld material has been ground away. A dremel and one of these did the trick, and only took about 5 minutes:



I picked up a slightly used FMF Q2 from another DR owner on the Yahoo user group, at which point I rejetted the carb, did the airbox mod, etc.

Over the winter, I decided to clean up the header pipe (and the midpipe of the FMF as well). Started by going to town on the dirt-baked header with a wire wheel:


This made pretty short work of the dirt, as well as the paint. After that, I spent a couple hours with a 3" dia sisal polishing wheel with some emery compound which yielded this:


I followed that up by spending another hour or so with a cotton buffing wheel and stainless polishing compound (the green stuff). This is what I wound up with:


Back on the bike, all nice and shiny-looking:


Other than the time that it takes, wasn't difficult at all, and the results were definitely worth it!
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Old 05-09-2011, 07:30 PM   #24
motoracer51
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Hey guys, just to be certain I buy the correct one, which years of the GSXR1000's were the canisters Titanium, and the ones preferred to use on the DR650?

Thanks!
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Old 05-09-2011, 07:36 PM   #25
thumpididump
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'01-'02 GSXR 1000

- should be stamped x40F0x on the side


https://docs.google.com/present/view...44j_68fdsm79hf





Quote:
Originally Posted by motoracer51 View Post
Hey guys, just to be certain I buy the correct one, which years of the GSXR1000's were the canisters Titanium, and the ones preferred to use on the DR650?

Thanks!
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Old 05-09-2011, 07:39 PM   #26
motoracer51
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Quote:
Originally Posted by thumpididump View Post
'01-'02 GSXR 1000

- should be stamped x40F0x on the side


https://docs.google.com/present/view...44j_68fdsm79hf

Thanks!! I found a 2003 oe - not the right one, huh?

ETA : is johnnok a few posts up incorrect in his years of 2001-2003?
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Old 05-09-2011, 07:47 PM   #27
thumpididump
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Worry more about the number stamped on the side, not the year. The guy I bought mine from said it was an '03 also, but all I cared about was that it said X40F0X.

If it's stamped 35F01, then that will also work, too. But it means that it's from a GSXR600 or 750, and the guts of the muffler are made of steel, not titanium. Only a pound or so heavier. I happen to have one in my basement. Works great and I can't tell any difference in terms of performance or sound.
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Old 05-09-2011, 08:15 PM   #28
motoracer51
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Quote:
Originally Posted by thumpididump View Post
Worry more about the number stamped on the side, not the year. The guy I bought mine from said it was an '03 also, but all I cared about was that it said X40F0X.

If it's stamped 35F01, then that will also work, too. But it means that it's from a GSXR600 or 750, and the guts of the muffler are made of steel, not titanium. Only a pound or so heavier. I happen to have one in my basement. Works great and I can't tell any difference in terms of performance or sound.

Thanks! Where is the code stamped generally so I can ask the seller - they seem clueless.
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Old 05-09-2011, 08:25 PM   #29
thumpididump
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Old 05-09-2011, 08:51 PM   #30
motoracer51
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Thanks. Apparently this guys pipe is incorrect s it shows a X18G1X code on it. Any idea?
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