Suzuki GSXR 750 ultimate track/road project - Episode 1 - Exhaust Installation - Knox Armour

Suzuki GSXR 750 ultimate track/road project - Episode 1 - Exhaust Installation - Knox Armour
After much deliberation and a bit of track experience last year, I’ve fallen back in love with my GSXR and even though there are some great new bikes out there, I’ve decided to keep it. But, there are some areas I want to improve and some areas that need to be addressed to make it perfect…
So, without further ado, welcome to a new series on the Knox armour KZbin channel, a project where we'll be making my Suzuki GSXR 750 the ultimate 50% track bike, 50% road bike, making upgrades, learning and having a laugh along the way.
This episode is about sorting the power out once and for all. My bike came with a full system exhaust when I bought it and I thought it was great… roll on my first track day and the realisation that I couldn’t ride it as it was due to the noise restrictions on UK track days and I didn’t want to be turned away before even turning a wheel, so I sought about fixing it.
Like most things in life, it turns out its not that straight forward and while the baffle I sourced from GPR exhausts helped the sound, it drained a lot of the power and punch on track… just what you want when you are on an unrestricted race track! A remap and dyno session at Jordan Bikes confirmed that!
So, in this video, I go part way to solving that and remove the aftermarket full system exhaust and install a GSXR 750 standard exhaust for the sake of a good balance of performance gains and noise control. Stock exhaust vs Full system exhaust sounds crazy, but having now ridden the bike, I am pretty confident that the end result will be great!
Hope you enjoyed this one, please let me know what you think and tune back in for the next episode where we’ve got something else really cool planned!
To check out all the gear that we make at Knox, please check out www.planet-knox.com
Thanks,
Aaron
KNOX
www.planet-knox.com

[@KnoxArmour]

Hope everyone is enjoying the series! We have set up a playlist where you can see all the episodes of the GSXR750 project and the updated video to this one is now live on kzbin.info/www/bejne/gXeTdHqHlJurirM. In this next video, we took it back to get remapped with the stock exhaust back on and got some very interesting results!! 👍Aaron Knox

[@maxoberbroeckling1820]

I have the exact same K8 750. Same color. Stock pipe and I love it. The back pressure and subsequent low end power and grunt created by the servo valves in the factory exhaust is what makes the 750 so special. You might gain a couple mph at the top with an aftermarket system but you lose all the low end punch that makes the 750 such a blast to ride. Added bonus: with the factory system you can hear the servos in the exhaust and it sounds awesome! Doesn’t look as bad as some factory pipes either which is nice.

[@nihvl]

This is probably a KZbin first in the motorcycle community history that someone replace a full system with stock exhaust including the catalytic converter. Great video as always looking forward to seeing more from this project got a little sneak at the K-tech forks this is already shaping up to be a great series 🙌

[@KnoxArmour]

Haha!! Maybe that is the case! Happy with the solution! Sshhh!! Top secret that! 😀

[@BN1960]

I think that gen GSXR750 is the best looking of them all Really lithe and purposeful

[@KnoxArmour]

Thanks, totally agree... 12 years on its still looks as sharp as any new model in my opinion. Thanks, Aaron KNOX

[@UniversalBikers16]

Love this GSXR, Aaron! Looks great,

[@KnoxArmour]

Thanks! Yes, really happy with the result so far! Aaron KNOX

[@acopernic]

Splendid bike Aaron. The full exhaust gives her this elegance. Well done.

[@KnoxArmour]

Thanks, agree it looks better with the standard one on... much classier! Aaron Knox

[@aeror115]

The 750 is a beautiful gsxr for road and track use! cheers folks

[@DylanGSXR]

Good for you , it's a first to see someone going back to stock but if it feels better and rides better that's all that counts , I put a full yoshimura system on mine and the noise reading was 101.8 dB . Looking forward to seeing how it all goes 👍

[@KnoxArmour]

Thanks, I'm sure the full Yoshimura is a much better full system than the one I removed. Even then, I now don't have any worries about whoever sound tests it, I know some marshalls are really harsh and others more lenient.. it just wont be an issue now at all. Looking forward to seeing how the new exhaust performs in a few weeks and to put the issue behind me and move forward to other things. Thanks, Aaron KNOX

[@Prince-yr1ln]

I love the stock look

[@dancarlos1216]

Currently doing about the same on my 06 GSXR600 in the US. Awesome videos.

[@KnoxArmour]

Good luck! Aaron KNOX

[@amancalledjames9345]

Looks good - it’s from before stock exhausts became necessarily massive and stifling.

[@KnoxArmour]

Thanks, agree... some are now totally massive 😂

[@abhishekpm1038]

Top notch video as usual.

[@KnoxArmour]

Thanks a lot! Aaron Knox

[@LambChopRides]

I was going to say 5 KG! crazy heavy the standard equipment. Must be an aftermarket option.. my Spark ti system on my GSXR1000R was pretty quiet with baffle in.. think it was 101 which doesn't help at 98db tracks though 😒

[@KnoxArmour]

Haha, in fairness its the Cat that is the heavier bit, the end can was actually quite light... I've got a plan for saving the 5kg... slim fast 🤣! Well yes, mine was down the 99db ish with baffle, but in doing so killed the power, hence the need to fix. Full systems are great for peak power, but pretty poor at controlling noise. Aaron.

[@stanleyknife1967]

Probably the best idea to lose some of your mass (you and me both!). Lowering the rolling mass is also good, but light wheels can be prohibitively expensive. The bike might still benefit from a retune even with the stock exhaust. Great video. Keep them coming. The stock exhaust does look good btw.

[@KnoxArmour]

Thanks! Yes the weight loss from that area is the plan, much cheaper than any aftermarket upgrade 😉! Got the bike booked back in for the retune and to get the servo reconnected (think it's been powered off via the ecu). Hopefully will get some pretty good results 👍

[@stanleyknife1967]

@@KnoxArmour yes, you should get the gixxers grunt back once the exhaust valve is working correctly.

[@engelbermartinez788]

Ya mérito voy por la mía…

[@OS57HYRB1K3R]

Trust me mate, UK's track day is a joke. Stupid rules. Why would you buy a house next to a race track. What are you expecting, Library quality? lool. Love your video. More video on this bike will be much appreciated

[@KnoxArmour]

Thanks Zamil. Yes, more coming soon! Aaron KNOX

[@throttlefreakz]

Great video series, have you thought about changing the rims to carbon fiber to make it a little lighter?

[@KnoxArmour]

Thanks! Actually no, for this project series we want to keep it a bit more realistic and accessible in terms of price. Think carbon wheels are about £3k here in the UK and the bike is worth only about £5k, so it probably wouldnt make much sense. We'll go the cheaper option and loose the weight by eating less! 🤣 Aaron KNOX

[@expatbiker6598]

Before exhaust used to have for race/ track only. No point in it as noise regulations get more strict. As time goes by. We will have no place to Express our need 4 speed.

[@FreddyKings87]

Let the stock exhaust system stay. Only change the slip-on..

[@cecilwilson5442]

Just bought a 2006 gsxr 1000 and it has the yoshimura end can they sold with the bike as new it works for track days here in northern Ireland with the exhaust valve working,, granted its pre catalytic,, and titanium,,, good honest videos cheers ☘️☘️☘️☘️☘️☘️

[@KnoxArmour]

Awesome, enjoy it! Yes anything manufacturer supplied will be OK, its just the aftermarket stuff that struggles on UK noise testing. :)

[@-DC-]

Every used sportsbike I've ever bought I've returned to stock and sold on the so called 'enhancements' very few people can outride the capabilities of a stock road bike on half decent tyre's 👍, done well out of exhaust systems and steering dampers etc lol.

[@KnoxArmour]

Agree, much better investments else where on the bike, tyres etc... You'll be able to find the full system on ebay before too long 😂

[@cordellian]

Hi, what baffle is that you are using i cant find one to fit my akropovic exhaust, haven't seen any tapered ones anywhere? myn is a 60mm pipe

[@mujtabakamal]

Sensible rider 👌 👍 👏 💯

[@alexventrov6826]

I understand putting the stock exhaust on for the noise regulations, but for it to be running better? Something's not adding up, the graph that was displayed with the air/fuel ratio was all over the place with the aftermarket exhaust. If the restrictions were removed from the ECU and the air/fuel ratio is corrected, even with a crappy slip on and a decat link pipe you're still looking at a huge improvement no matter what. Like I said something is not adding up here lol.

[@KnoxArmour]

The main issue is that you have to baffle the full system exhaust because it is too loud for track days. This then kills the power. Had it mapped perfectly with baffle in place and results were not good. Stay tuned for the next episode where we'll share the results!

[@christiansacra599]

Perhaps running aftermarket headers, linkpipe, but stack muffler might have been a good compromise between sound, weight, and performance.

[@KnoxArmour]

Thanks Christian. It appears most of the noise is controlled within the catalytic converter. You can now see the updated video on the playlist where we got some amazing results with the stock exhaust. Thanks, Aaron KNOX

[@Xwii610]

Throw the baffle in when they test the sound, then take it out afterwards lol

[@KnoxArmour]

Haha, yes that would be a good idea if only they hadn't installed drive by noise cameras everywhere on track now and you get black flagged for it. Aaron KNOX

[@patw9175]

I have a gsxs750 which isn't the same but fuck I love that thing. Suzuki might be the discount Honda but nobody is better than them at making bikes that are more than the sum of their parts.

[@KnoxArmour]

Awesome bikes! Aaron KNOX

[@wes3029]

Hey mate. I have the same bike, stock headers and cat but with a yoshi slip on thats really not that loud at all. What are you thoughts on the stock headers with a slip on ? I'm considering a tune to see what that can do.. I have a K&N air filter and I also felt the difference when I installed it.. cheers 🍻

[@KnoxArmour]

Cool. We ended up remapping the bike with the stock exhaust fitted and its now 131hp at the rear wheel which is about what these bikes can make without engine work. Don't think a slip on will do much tbh, as the stock one is straight through without much restriction. For full racing, course a high quality full system may give a bit more top end power. Hope that helps, Aaron KNOX

[@Bow-to-the-absurd]

Does the exhaust valve turn by hand.? I hate exhaust valves and servos, they are built to break.

[@KnoxArmour]

Yes it does, exhaust was pretty much brand new so its in perfect working order.. its just the servo motor that needs the power turning back on to make it work.

[@A7XBilly]

Why the map boxes does not displayed the selected map?

[@KnoxArmour]

It doesnt show unless you select it and then the light turns off. Always full power, not a lot of point of the other rider modes tbh. Thanks, Aaron KNOX

[@Roy750]

Prior to this video, had the bike been remapped for the full exhaust system? Just wondering as I've just bought a 750 with full system. Thanks

[@KnoxArmour]

Hi, no don't think it had been, it was a bit snatchy etc. But in any case, we remapped it again with the stock exhaust and got really good results. You can check out the update here - kzbin.info/www/bejne/gXeTdHqHlJurirM. Thanks

[@Roy750]

@@KnoxArmour great, thank you. Crazy how much more power you made with the stock exhaust.

[@KnoxArmour]

@@Roy750 well a lot of lessons learned on this project tbh... going forward for track day riding in UK, I personally wouldn't bother with an aftermarket system, but I would get it remapped and I would spend money elsewhere as I think there are more gain with suspension etc. Thanks 😀

[@shashankmanae]

How about using the after market headers with the original silencer ?

[@KnoxArmour]

Good question, but actually, we were advised that an important part of the noise control is the catalytic converter. Actually the original silencer is see through, so has some extra packing but you can see through it. I think most of the noise suppression is coming from the original header. Thanks, Aaron KNOX

[@shashankmanae]

@@KnoxArmour very good research on your part Aaron. Thanks !

[@chiltonadriaanse6036]

Why didn't you just put in a mid pipe muffler in between the header & GPR exhaust? Like on some old Yoshimura setups

[@KnoxArmour]

Great idea, although I couldnt find anything like this at the time. However, it may have had the same effect as the baffled version which killed the power. We updated the video and got it remapped again with standard exhaust and achieved 131hp which I was really happy with. You can see it here - kzbin.info/www/bejne/gXeTdHqHlJurirM. I'm now able to go on any track day no noise issues and have great performance. Thanks, Aaron KNOX

[@chiltonadriaanse6036]

@@KnoxArmour Cool I'm glad. The CAT really choked my other bike. We also have noise limits @ our track in Cape Town.

[@ghostridermm9]

Hi i feel your pain. I have a Suzuki gsxr 750 isle of man edition. And my exhaust system was rotten badly. So i have a full exhaust system. From black widow. Getting it tuned soon as well once I get it back. Can’t wait 😎. Just curious of how much horsepower I’ll gain. Your bhp is 117 which is very interesting 🤔.

[@KnoxArmour]

Hi, actually here is the update video where we took it back to get remapped with stock exhaust and got great results kzbin.info/www/bejne/gXeTdHqHlJurirM. Thanks Aaron Knox

[@ghostridermm9]

@@KnoxArmour If it’s okay with you when I get the bike tuned are you interested to know the results? By the way my model is a k7

[@KnoxArmour]

@@ghostridermm9 sure, feel free to share! I'm sure others on here will be interested too 😊.

[@ghostridermm9]

@@KnoxArmour good morning. I got my bike back. How do i share the results?

[@kingdomohardknox587]

KNOX LIFE

[@datAero]

it'd get the bike just for the aesthethics, it's crisp

[@KnoxArmour]

Agree, for a 12+ year old bike, its not too bad is it? ;)

[@balisracing4378]

Who the hell would see a channel where they put factory exhausts back to their gixxers??? Are you out of your mind😂

[@Freedombelongstotherighteous]

Is this a 2008 ? I have a 2008 gsxr 750 and I am so dedicated to it , financially I can’t do any upgrades but I hope to soon ! . I would never sell it even when I buy a new one

[@KnoxArmour]

Hi, yes its a K8 model. Brilliant bike and so far super happy with the amendments. All the best, Aaron KNOX

[@Freedombelongstotherighteous]

@@KnoxArmour your fairings are in spectacular condition do you recommend any product to remove swirls /buff/ shine ?

[@undecodable6145]

For the first time I am convinced about the standard pipe and the track restrictions are not very cool or logic

[@Bow-to-the-absurd]

Bike manufacturers put a lot of time into creating an engine that works across the rev range Aftermarket exhausts undo most of that

[@undecodable6145]

@@Bow-to-the-absurd of course and that's why ecu flash is required

[@jordanjoestar8839]

Fun fact. The 2006 GSXR 1000 still has the fastest 0-60 for any OEM motorcycle in the world. Let that sink in.

[@mastermorphine]

🖤SUZUKI🏍GSXR🚀750⚡️

[@terrynicholson9273]

I have looked at a couple of similar aged GSXR 750's recently and usually the worst things about the bike are the stupid stuff done to it by the knuckle dragging previous owners. Very few are anywhere near standard and most of the 'improvements' have actually made the bike worse. Usually you know the bike will be a dog just by reading the semi literate drivel written by the current owner; 'Gixxer innit bruv' 'banging fast' etc

[@KnoxArmour]

Haha, yes can be the case! Its important to upgrade a bike methodically and with good reason in my opinion. Thanks, Aaron KNOX

[@dre.fm8]

What year is the bike?

[@KnoxArmour]

2008. Thanks Aaron Knox

[@JDeezle21]

Tyres?

[@KnoxArmour]

Hi, they are Dunlop Sportsmart MK3... best tyres I have ever used on this application. Thanks, Aaron KNOX

[@CarsMeetsBikes]

I think the K&N filter actually has less performance than the stock from what I’ve read, since it’s made to be washable and reused it’s supposedly isn’t as good performing as the stock disposable one. I have the K&N because it’s reusable but I’m not trying to make peak performance from my gsxr

[@KnoxArmour]

Yeah not sure about that... K&N air filters are designed to flow more air into the bike. Due to the way they are made they are re-usable. Thanks, Aaron KNOX

[@Bow-to-the-absurd]

Loud exhausts suck. Worse mod I ever made to my Nc30

[@annabanna666]

imagine a country putting sound limit on racing cause of ppl complaining about the noise,....... what the fuck

[@KnoxArmour]

Yes its real!

[@aeonthailand]

The stock exhaust is much more beautiful than the after market one

[@psjasker]

Nanny state … wake up people.

[@maybe5883]

Trailer your bike to a different race track and keep your exhaust

[@KnoxArmour]

To be fair Josh there arent a huge amount of them in the UK and they all have noise testing. With my full system exhaust I would not be allowed to ride at any of them apart from 1. Anyway, look forward to sharing the results of the standard one we fitted to the bike. Thanks, Aaron KNOX

[@caroldave4037]

Manufacturers spend millions and many many hours testing everything on bikes for maximum performance then jo public comes along spend a fortune to make them noisier and slower.....agreed modern pipes are hideous but they do work ...

[@KnoxArmour]

Agree, they have massive R&D and are hard to beat... very happy going back to stock! Thanks Aaron Knox

[@annabanna666]

nope, what a load of nonsense..... they develop them to meet "regulations" and to fit certain restrictions not for max performance , hence why a good tuner and pipe n filter can see decent power n torque gains on almost every bike but hey im sure you know better than all the racing pros and tuners that do it for a living

[@annabanna666]

slower.............BULLSHIT........i bet you never even had a bike you own tuned

[@alexventrov6826]

@@annabanna666 Exactly lmao, gotta love the know it all attitudes.

[@drewcecato221]

you didnt use the K&N race filter which flows a lot better. And the 08-10 servo motors are junk and should be removed. buy an arrow and keep the baffle in literally problem solved. the stock 08 headers are good headers you remove cat and just drill the butterfly valve completely out and ceramic coat them. they will flow fantastic.