Recent pics of the GSXR

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Originally Posted by Tech5

You know it's really bad for the bike (motor) running with no exhaust and no tune right?

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Actually on our shop dyno the earlier FI bikes ran VERY rich, and with the exhaust off they are slightly lean, but not bad enough to really do damage. That's mostly pre-04 or so and at my elevation, newer bikes no chance in hell. My R1 was leaner than I felt safe with just slip on's and a gutted cat.

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Originally Posted by 03RCode

Actually on our shop dyno the earlier FI bikes ran VERY rich, and with the exhaust off they are slightly lean, but not bad enough to really do damage. That's mostly pre-04 or so and at my elevation, newer bikes no chance in hell. My R1 was leaner than I felt safe with just slip on's and a gutted cat.

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That makes sense. It feels the slightest bit peppier with no muffler, but I figured it was just all in my head because the noise. Hell, it may be. Still not sure if I'd wanna ride too hard with no muffler though, lol

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Originally Posted by 03RCode

Actually on our shop dyno the earlier FI bikes ran VERY rich, and with the exhaust off they are slightly lean, but not bad enough to really do damage. That's mostly pre-04 or so and at my elevation, newer bikes no chance in hell. My R1 was leaner than I felt safe with just slip on's and a gutted cat.

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Then you need to calibrate that machine , I have worked and ran plenty on the dyno that shows even with newer bikes with o2 sensors it's still very lean .I am not saying it will blow the motor up in few months but over time it WILL damage that motor it's a fact !

It has NO back pressure which Bikes needs . OH btw what shop is this so I MAKE SURE I don't ask for help !

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Originally Posted by Tech5

Then you need to calibrate that machine , I have worked and ran plenty on the dyno that shows even with newer bikes with o2 sensors it's still very lean .I am not saying it will blow the motor up in few months but over time it WILL damage that motor it's a fact !

It has NO back pressure which Bikes needs . OH btw what shop is this so I MAKE SURE I don't ask for help !

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No point in arguing with someone who knows it all. Not like we haven't been in business for 15 years and are one of the most popular tuning shops in the area. Surely he would know that my elevation is alot higher, and that we tune several bikes on a daily basis.

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Originally Posted by 03RCode

No point in arguing with someone who knows it all. Not like we haven't been in business for 15 years and are one of the most popular tuning shops in the area. Surely he would know that my elevation is alot higher, and that we tune several bikes on a daily basis.

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cool come back

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Originally Posted by Tech5

cool come back

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Iknorite

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Originally Posted by Tech5

cool come back

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actually i dont think he was being rude. I think just stating and opinion.

I have HEARD that running no muffler could potentially cause damage. But i have never seen it, nor have i ever tuned a bike, nor have i run my bike with no exhuast. So i will have to yield to other people with more expertise.

He was just stating that the bikes they have tuned havent really seen a condition where it would cause engine damage. he didnt say "youre full of shit and completely wrong".

Ok, here is the truth - back pressure is a requirement on 2 strokes, but not necessarily a requirement on 4 stroke engines.
The belief that back pressure is needed goes back to the old days of carbs. Modified carbed bikes and cars could not adjust because of the way that backpressure caused air to flow backwards through the carburetor after the air already got loaded down with fuel, and the air received a second load of fuel. When backpressure was reduced, the bikes no longer had a double-loading effect, and tended to burn valves because of the result - really lean.
IF you have an adequate engine management system, with proper methods of controlling air and fuel delivery to the engine, you can run without an exhaust at all, and not burn up valves. That is fact.
Now, reality is that the particular bike in question still has exhuast back pressure with the muffler removed, but that back pressure is reduced. This has potential to burnt up exhaust valves if not compensated for through tuning.

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Originally Posted by David88vert

Ok, here is the truth - back pressure is a requirement on 2 strokes, but not necessarily a requirement on 4 stroke engines.
The belief that back pressure is needed goes back to the old days of carbs. Modified carbed bikes and cars could not adjust because of the way that backpressure caused air to flow backwards through the carburetor after the air already got loaded down with fuel, and the air received a second load of fuel. When backpressure was reduced, the bikes no longer had a double-loading effect, and tended to burn valves because of the result - really lean.
IF you have an adequate engine management system, with proper methods of controlling air and fuel delivery to the engine, you can run without an exhaust at all, and not burn up valves. That is fact.
Now, reality is that the particular bike in question still has exhuast back pressure with the muffler removed, but that back pressure is reduced. This has potential to burnt up exhaust valves if not compensated for through tuning.

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Thank you I did not full the need to type all that , but you did a well put job sir .My original post was meant for this bike in question in this thread.Good Job

Both of you - Tech5 and 03RCode - are both right. There is no guarantee that it will hurt the bike, and at high elevations, it is less of an issue, as the air is already less dense; however, it is not a recommended practice.

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Originally Posted by David88vert

Both of you - Tech5 and 03RCode - are both right. There is no guarantee that it will hurt the bike, and at high elevations, it is less of an issue, as the air is already less dense; however, it is not a recommended practice.

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That's why I said at my elevation in my original post, I'm atleast 1,500-1,700 feet higher than the ATL area, if not more than that.

Thanks for the technical explanation, I hate typing on this laptop and it would have taken 3 days to write it out.

I still feel ok with how I do it. Around town, soft riding = no muffler, trips or race track = muffler. If it burns valves I'll chalk it up to foolishness, if it doesn't ever burn a valve I'll sit around and wait for it to happen.

lol

It is true that at lower rpms there is a larger window that the engine can run at safely, and at higher rpms the power output increases, and the window at which the engine can safely operate is much smaller. I would suggest that you still run some sort of muffler on the street though - without a muffler, it will just sound bad, and most experience riders will chalk you up as a squid.
Look for a used Yoshimura on Ebay, they aren't that much.

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Originally Posted by David88vert

It is true that at lower rpms there is a larger window that the engine can run at safely, and at higher rpms the power output increases, and the window at which the engine can safely operate is much smaller. I would suggest that you still run some sort of muffler on the street though - without a muffler, it will just sound bad, and most experience riders will chalk you up as a squid.
Look for a used Yoshimura on Ebay, they aren't that much.

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Thanks for the responses and advice. Here's my RS-3

http://farm6.static.flickr.com/5183/...74be9471_z.jpg

I'm getting a PC from a buddy, then I'll just get it tuned for no muffler. Squid or not, lol.

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Originally Posted by David88vert

It is true that at lower rpms there is a larger window that the engine can run at safely, and at higher rpms the power output increases, and the window at which the engine can safely operate is much smaller. I would suggest that you still run some sort of muffler on the street though - without a muffler, it will just sound bad, and most experience riders will chalk you up as a squid.
Look for a used Yoshimura on Ebay, they aren't that much.

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He is a squid. Lol



That shortened Yoshi looks hot, leave it!

Keep the Yoshi. That's a good unit, and should be plenty loud enough for you.

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Originally Posted by 03RCode

That's why I said at my elevation in my original post, I'm atleast 1,500-1,700 feet higher than the ATL area, if not more than that.

Thanks for the technical explanation, I hate typing on this laptop and it would have taken 3 days to write it out.

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I would like to take this time to say I am sorry for reading your post wrong. I didn't read about your elevation and I am deeply sorry for getting that mixed up and not taking the time to actually read the entire post .You're correct with that statement ,
Sorry Joshua

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Originally Posted by David88vert

It is true that at lower rpms there is a larger window that the engine can run at safely, and at higher rpms the power output increases, and the window at which the engine can safely operate is much smaller. I would suggest that you still run some sort of muffler on the street though - without a muffler, it will just sound bad, and most experience riders will chalk you up as a squid.
Look for a used Yoshimura on Ebay, they aren't that much.

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With the next few days getting cooler to and no exhaust don't take but the wrong blip of the throttle and suck that cooler air back in to cause a issue with the valves . Squids will never learn

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Originally Posted by Catnip

Thanks for the responses and advice. Here's my RS-3

http://farm6.static.flickr.com/5183/...74be9471_z.jpg

I'm getting a PC from a buddy, then I'll just get it tuned for no muffler. Squid or not, lol.

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Tune is the key , but if you want to gain power have a exhaust on it .

I rode around town for about 3000 miles with just a $6.99 pipe from Autozone as an exhaust. The noise level didn't bother me at all.

Getting my new bike Monday. One is a stretched Honda CBR and the other is a stock 06 GSXR. Probably going for the CBR.

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Originally Posted by Tech5

I would like to take this time to say I am sorry for reading your post wrong. I didn't read about your elevation and I am deeply sorry for getting that mixed up and not taking the time to actually read the entire post .You're correct with that statement ,
Sorry Joshua

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S'all good man. I know next to nothing about tuning at your elevation, I've just been around it forever up here.

i like it my 2001 GSXR 750 is also stretched but not all the way out which i want to do before next bike week. I like the colors like you said it is very rare to see those colors on that bike, i have seen you before in warner robbins also the bike looks good, damn what they say. for a stretch that is nothing go to the vortex on thursday or bike week and guys have their rear tire 14" behiind the bike which is ridiculous.

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Originally Posted by bicsintegra

i like it my 2001 GSXR 750 is also stretched but not all the way out which i want to do before next bike week. I like the colors like you said it is very rare to see those colors on that bike, i have seen you before in warner robbins also the bike looks good, damn what they say. for a stretch that is nothing go to the vortex on thursday or bike week and guys have their rear tire 14" behiind the bike which is ridiculous.

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Thanks man, always good to hear positive comments about something that means a lot to you.

Biker Boyz.....

j/k, I like it.

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Originally Posted by Vteckidd

Stretched bikes are gay. Especially 600s which aren't made to drag.

Ruined a perfectly good bike.

<<<<<<owns a non stretched 600 2005

Hate the colors too loud for me. Screams stunna

One things for sure though I bet you don't ever care about going fast in a car ever again

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funny how ppl hate stretched bikes but some ppl dont understand that some ppl ride bike for fun not to see if they are faster than the next person. personally, im 25 and have owned over 10 bikes but the one i have now (08' zx-10 with a 330) has been the funnest to drive bc of the looks i get. lay a bike down 2 or 3 times(which i have, 1x at the track) and going in the mountains just isnt as fun anymore. I bet some of yall hate harley guys too. lol. this is what u call a hater. haha. your bike looks clean and i think thats all that matters. just my 2c.
)

i think it

super bike with zoom zoom speed.... zoOm zoOm

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Originally Posted by Catnip

What aren't you feeling about it?

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You can get all mad that I'm responding and say stupid shit but the bike looks dumb. It's got the paint scheme and look for a real track but you have it chromed/polished out and stretched. It's probably "cool" south of ATL but up here in the mountain area...you know where there are corners, the bike is pretty useless. If the stretch was removed it'd look a whole lot better.

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Originally Posted by AnthonyF

You can get all mad that I'm responding and say stupid shit but the bike looks dumb. It's got the paint scheme and look for a real track but you have it chromed/polished out and stretched. It's probably "cool" south of ATL but up here in the mountain area...you know where there are corners, the bike is pretty useless. If the stretch was removed it'd look a whole lot better.

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He doesn't own the bike anymore but his new one is the same way.

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Originally Posted by AnthonyF

You can get all mad that I'm responding and say stupid shit but the bike looks dumb. It's got the paint scheme and look for a real track but you have it chromed/polished out and stretched. It's probably "cool" south of ATL but up here in the mountain area...you know where there are corners, the bike is pretty useless. If the stretch was removed it'd look a whole lot better.

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To each their own. If I cared about cornering and mountains, I'd probably live closer than 6 hours from the closest decent mountain ride and have vehicles setup for cornering. I live 30 minutes from 2 drag strips, it's completely flat and straight down here, and I grew up around drag racing. If you're not into drag racing, that's cool, man. I won't try to force my hobbies or my opinion of anyone elses hobby, onto anyone. I understand how stretching a race replica could sound fucking retarded, but I got compliment after compliment for it being different.

Like Bacon said, this bike is sold. I have an '08 GSX-R 600 with 8" extensions now. Loving the new model compared to other bikes I've ridden.

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Originally Posted by -S Double C-

busa's are slows run a 08 gsxr 1000 or zx10r against a 08 busa (fastest year) stretch or swb and see the outcome with good riders

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true. Ive owned an 08 busa, and 6+ 07/08 gsxr 1000's. busa only wins 170+ even lower highwya speeds 1000 wins., but not soo much on hte zx10,cbr,r1 for highway.