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Old 12-17-2012, 11:47 AM   #71941
Cobain
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It is to me. $12 saves is $12 earned. just wanted to make sure theres nothing special about the aftermarket overpriced one.
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Old 12-17-2012, 12:09 PM   #71942
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Quote:
Originally Posted by Cobain View Post
It is to me. $12 saves is $12 earned. just wanted to make sure theres nothing special about the aftermarket overpriced one.
Many figured out this very easy, two minute mod to the stock retainer long before an aftermarket piece was ever offered. Not a big deal.

Take off stock retainer, grind down less than a 1/8" of the outer edge using a grinding wheel. Done. Two minutes tops.
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Old 12-17-2012, 12:16 PM   #71943
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Originally Posted by procycle View Post
Controlling flex during cornering is probably the main purpose of a fork brace. The other benefits are secondary.
For me,it's somewhere to attach my Yamaha XT660X m'guard to,to keep the shit down! :) (mudguard to follow,it's still in Scotland!).
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Old 12-17-2012, 12:25 PM   #71944
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Originally Posted by Cobain View Post
It is to me. $12 saves is $12 earned. just wanted to make sure theres nothing special about the aftermarket overpriced one.
Na just being just cheap is better. Thats why we like DR's anyway.
I just kidding you of course. Hell, Im so cheap I'm still running the stock sprocket
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Old 12-17-2012, 12:36 PM   #71945
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Thought i better show that mudguard since the Yanks lack choice in motorcycles!
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Old 12-17-2012, 12:49 PM   #71946
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Originally Posted by procycle View Post
I'd much rather see the test bike have a DG or FMF muffler. My own testing says the GSXR can doesn't breathe quite as well as an aftermarket performance muffler.
How is it the GSXR can doesn't breath as well? I mean the 600/750 can from the factory is bolted to an engine putting out 110/130 RWHP?? And the 1000 can is bolted to an engine making what,...150 RWHP?? And a DR650 makes what,...35ish RWHP?

I'm not saying you are wrong, but my limited internal logic cannot compute your statement; and other than what I've just written above, I have no data to support or refute your statement. Just asking for more info on this?
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Old 12-17-2012, 01:00 PM   #71947
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Quote:
Originally Posted by Cobain View Post
It is to me. $12 saves is $12 earned. just wanted to make sure theres nothing special about the aftermarket overpriced one.
then go for it, no one is stopping you. it's been done before so it's not a new idea. heck you can even buy one done this way too: http://www.topgunmotorcycles.com/Pro...s/Drprod2.html

some don't have the tools to cut it them-self or they make way more than $12 at work in the time it takes to cut it down so it's easier to buy from someone else. over-priced would be for them to try and do it them-self.

people making and selling things is the basis of our economy.
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Old 12-17-2012, 01:08 PM   #71948
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Quote:
Originally Posted by VooDooDaddy View Post
How is it the GSXR can doesn't breath as well? I mean the 600/750 can from the factory is bolted to an engine putting out 110/130 RWHP?? And the 1000 can is bolted to an engine making what,...150 RWHP?? And a DR650 makes what,...35ish RWHP?

I'm not saying you are wrong, but my limited internal logic cannot compute your statement; and other than what I've just written above, I have no data to support or refute your statement. Just asking for more info on this?
it think it's all about high flow at the very highest rpms that a straight pipe can offer. that's the advantage the DG or FMF can offer, but the GSXR muffler offers very solid & similar mid-range flow.

Procycle is focused on max power and such (straight pipes & oversized engine kits) that's all. If that is not your thing, many are very satisfied the overall-range GSXR performance and weight saving over stock. Procycle sells aftermarket pipes and that is his focus.

This is an old graph and some say not entirely accurate but still give you a broad idea of what i'm talking about.
black = stock
blue = fmf
red = gsxr
solid line = hp
dash line = torque

i'm a lower RPM torque rider so the GSXR looks great to me and it does not need to be repacked.
it still has back pressure (like stock) vrs open pipes, so it's no surprise it has fatter low end torque but less high end hp than an aftermarket pipe. it's only after 7k rpm things change but I don't ride up in there.

i'm guessing the Busa muffler will perform very similar.

the DG and FMF pipes are no slouches however and offer weight savings and bolt on performance.
Procycle is a one stop shop for buying these performance items and make it easy and fast to get it done.

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eakins screwed with this post 12-17-2012 at 01:20 PM
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Old 12-17-2012, 01:09 PM   #71949
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Originally Posted by DockingPilot View Post
Yea, your cheap Its frickin $12. Why hack up the stock one. Not even worth the time involved.
+ shipping...
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Old 12-17-2012, 01:10 PM   #71950
procycle
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Quote:
Originally Posted by VooDooDaddy View Post
How is it the GSXR can doesn't breath as well? I mean the 600/750 can from the factory is bolted to an engine putting out 110/130 RWHP?? And the 1000 can is bolted to an engine making what,...150 RWHP?? And a DR650 makes what,...35ish RWHP?

I'm not saying you are wrong, but my limited internal logic cannot compute your statement; and other than what I've just written above, I have no data to support or refute your statement. Just asking for more info on this?
The dyno says so. The dyno also says the GSXR can requires a smaller main jet for the best peak horsepower.
The GSXR 1000 makes 250cc exhaust pulses that are individually blasted out the exhaust. The DR650 makes much larger individual exhaust pulses that have to escape. The total horsepower has a lot less to to with breathing than the size of the individual bang that has to find its way out.

There's no doubt that the GSXR can breathes better than the stock DR muffler but it's really only about 60% of the improvement that can be had with a good aftermarket muffler.

And of course, the GSXR1000 can gain more than 10 HP by installing a better flowing exhaust. It's choked up by the stock exhaust just like the DR is. That's one reason why there used to be so many good take-off mufflers around.
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Old 12-17-2012, 01:11 PM   #71951
NordieBoy
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Quote:
Originally Posted by VooDooDaddy View Post
How is it the GSXR can doesn't breath as well? I mean the 600/750 can from the factory is bolted to an engine putting out 110/130 RWHP?? And the 1000 can is bolted to an engine making what,...150 RWHP?? And a DR650 makes what,...35ish RWHP?

I'm not saying you are wrong, but my limited internal logic cannot compute your statement; and other than what I've just written above, I have no data to support or refute your statement. Just asking for more info on this?
As ProCycle says, 644cc pulses vs 250cc pulses...
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Old 12-17-2012, 01:23 PM   #71952
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that larger main jet also means lower mpg which some might not want to loose. if you're a mid-ranging kinda rider it's gonna work. if you're a max kinda rider get the FMF. if you don't want to repack then the GSXR/Busa pipe is ideal, if you have no problem repacking a muffler then the FMF is your muffler. the sound levels are lower on the oem GSXR/Busa muffler (they need to be 80db per law when bolted to the original bike) vrs more sound on the FMF and i've heard even more sound on the DG. sound level is a factor for some.

anything is better than stock, it's just what are your intentions and exceptions on choosing the right pipe for you.
I know you get this, i'm just writing this for others to read.



Quote:
Originally Posted by procycle View Post
The dyno says so. The dyno also says the GSXR can requires a smaller main jet for the best peak horsepower.
The GSXR 1000 makes 250cc exhaust pulses that are individually blasted out the exhaust. The DR650 makes much larger individual exhaust pulses that have to escape. The total horsepower has a lot less to to with breathing than the size of the individual bang that has to find its way out.

There's no doubt that the GSXR can breathes better than the stock DR muffler but it's really only about 60% of the improvement that can be had with a good aftermarket muffler.

And of course, the GSXR1000 can gain more than 10 HP by installing a better flowing exhaust. It's choked up by the stock exhaust just like the DR is. That's one reason why there used to be so many good take-off mufflers around.
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eakins screwed with this post 12-17-2012 at 01:39 PM
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Old 12-17-2012, 01:32 PM   #71953
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Quote:
Originally Posted by procycle View Post
The dyno says so. The dyno also says the GSXR can requires a smaller main jet for the best peak horsepower.
The GSXR 1000 makes 250cc exhaust pulses that are individually blasted out the exhaust. The DR650 makes much larger individual exhaust pulses that have to escape. The total horsepower has a lot less to to with breathing than the size of the individual bang that has to find its way out.

There's no doubt that the GSXR can breathes better than the stock DR muffler but it's really only about 60% of the improvement that can be had with a good aftermarket muffler.

And of course, the GSXR1000 can gain more than 10 HP by installing a better flowing exhaust. It's choked up by the stock exhaust just like the DR is. That's one reason why there used to be so many good take-off mufflers around.
i'm curious about the exhaust pulses than move through the muffler.
have you ever cut open a stock muffler and measured the openings?
if the GSXR muffler is optimized for 250cc pulses (a 1000cc 4 stroke motor so 1 cyl 250cc pulse at a time so everyone can visualize that) YET it performs better than the stock muffler, what does the stock muffler pulse flow at?

150cc? less, more?

so then using this anology, the Hayabusa muffler is from a 1300cc bike with 2 mufflers. each pipe sees 650cc of the engine (being pushed by 2 cyl) so it flows at approx 325cc pulses (this does not acct for cross over pipes in the header which spreads this pulse flow out) . no wonder people who have used that muffler say it performs better than the GSXR muffler. have you dyno'd the Busa pipe to compare?
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eakins screwed with this post 12-17-2012 at 01:43 PM
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Old 12-17-2012, 01:34 PM   #71954
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I just used the stock retaining ring when I threw my 14T CS on. No biggie, after a mile the chain "trimmed" the retaining ring. I was afraid that the chain might be damaged but it wasn't. I got 22K miles out of that chain. Hope this helps.


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Instead of buying the smaller triangular front sprocket retainer to fit with 14t sprockets, can't you just cut the stock one down? Does anyone get what I'm saying here.
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Old 12-17-2012, 01:38 PM   #71955
MikeyP
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Originally Posted by procycle View Post
If LexTalionis is amenable to cutting the top of his airbox and upgrading the exhaust I'm still on board for this.

I'd much rather see the test bike have a DG or FMF muffler. My own testing says the GSXR can doesn't breathe quite as well as an aftermarket performance muffler.

I'm not sure what tests you'd like to run, but I'll offer up my bike in the name of science. I live only a short drive away in SF and I have ~16K miles on the odo, GSXR exhaust, Kientech midpipe, stock header pipe with ground weld, open top air box with K&N filter (also have the stock filter on hand), relatively fresh spark plugs, fuel filter, DJ kit, and only ~1500 miles on the slides in the carb. I bought those from you just a few months ago Derek at the same time I did a complete carb rebuild. I also have on hand an mx_rob FCR that I've been trying to find time to install. I could bring that along or come back after I install it to see what numbers change if that interests you.

The only downside is that I won't be able to help for a couple weeks because of the holidays, but as soon as 2013 gets started I'm available.
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