New owner, introduction and some questions

[stgatev]

Many years ago, on a supermarket parking lot, I saw a Hayabusa and decided that this is the motorcycle I want to ride one day. Today is that day. Yesterday I picked up a gently used, in pristine condition, '23 Hayabusa in Thunder Gray / Candy Red.

I had many bikes over the years, some with even more power than the (stock) Busa. Last few bikes were a couple S1000RR, Tuono, and currently a Panigale V2 which shares the stall with the Busa.

Some mods are in order. I already replaced the lead-acid battery with a lithium one, heated grips and a tail tidy are coming in soon. Next is exhaust.

I read all about exhausts that I could find on this forum and other places before I bought the bike, and before bringing the bike home I have settled on a couple of R77 slip ons. However, now that I have the bike and have moved it around and negotiated its immense size, I decided that a single, more compact exhaust and a decat headers are much needed in order to reduce the size and weight.

Of the Akrapovic and Yosh AT2 that I would consider, I prefer the looks of the AT2. I have seen several comments saying that the AT2 is loud. Since "loud" is always relative, I am looking for something to relate it to.

For example, on my Panigale, I have a full Akrapovic under belly exhaust. Standing next to it, it is very loud, too much, but riding it, it is very pleasant in allowing the engine to let me know when it is happy.

On my S1000RR, I had a full Akrapovic system with a short can, and it was obnoxiously loud. Riding it was epic, but tiring, and firing it up in the morning was shaking the the house and waking the neighborhood. I removed it in just a few days because I felt like a complete bobo.

My son had an R77 with decat header on his little CBR300, and it was very audible, but I could live with it.

My Daytona 675R had a R77 with the stock headers (with a small cat), and it was borderline too loud for a prolonged ride, even with earplugs.

I have given these examples as some that I love, others I can live with, and others yet that are just too much.

In the absence of objective data, i.e. decibel measurement at a set distance at set RPMs, can anyone define the AT2 "loud" in relation to the above examples, or another?

Thanks all, and glad to be here. Looking forward to learning from you all!

[BigBSBusa]

Welcome to the .org! Don't have experience with the AT2 on the Gen3, so will defer to others to discuss.

[Dai.]

You will get a decent sound from a full system compared to slip on's. The full akra is decent and not overly loud whereas the M4 full exhaust i have is somewhat loud.

[Nevr enuf]

I have an M4 on my 2022 and it’s loud. Ear plugs are required.

If you’re going to add an exhaust be sure to do the holy trifecta- exhaust, Sprint air filter and ECU flash to tie it all together.

[stgatev]

I never ride without ear plugs. I am very protective of my hearing, and so far managed to preserve it. I expect that however loud the AT2 is, I will manage fine; I am more concerned with being a good neighbor and not drawing too much attention on the street.

[pcs]

the akro has a longer muffler so it will likely be quieter than the at2 yoshi. also, single side gen2 exhausts systems will work too if you want to consider other exhaust systems. you can buy an o2 sensor adaptor kit, or just add the bungs yourself, or just delete the o2 sensors with a tune and not bother with them.

[Hayabusa Wannabe]

Welcome to the forum @stgatev. Great bike!

[Bumblebee]

Welcome, @stgatev

That's a proper introduction.......and a good set of bikes to have in any garage....

You aren't new to the game so I'm sure you will find the exhaust that makes you happy....I'm a Yosh man myself, I've had Yosh exhaust systems for decades on all my Suzukis (except one and that was a Hindle Ti unit).

[stgatev]

I have always liked both Akrapovic and Yoshimura's aesthetics. I said that I prefer the Yosh over Akra in this instance is because Akra's link pipe is too long and exposed. If there was more fairing to cover it, or a heat shield, it would look better to me. Do you guys know if there is a heat shield for the long Akra link pipe?

[stgatev]

Well, I bit the bullet and went ahead with the Yosh. For the price difference to the Akra, I got me a fender eliminator, heated grips, a sound insert (I went with the longer, INS-27K) and I have just about enough left for a tune.

[VaBusa]

Welcome to the oRg!! Nice looking Busa!

[jwcfbd]

Welcome to the board

[stgatev]

I am in the habit of taking apart new bikes, study them for a few days, then put them back together.

This is also where I remove the PAIR and EVAP systems, but on this bike, there is no EVAP system. The overflow and expansion hoses from the tank both go straight down and out. Unexpected...

Is my understanding that (a) the Gen 2 cams work without modifications in Gen 3, and that (b) Brock's "performance" cams are stock Gen 2 cams correct? Since I am halfway there, I might do the cam swap and reclaim the 30 HP that people say are available at the top end.

[Hayabusa Wannabe]

This is also where I remove the PAIR and EVAP systems, but on this bike, there is no EVAP system.

Yes, the EVAP has been one of the differences in the California bike. I am surprised this has not been unified across all models, not that I would want it.

https://www.suzukipartshouse.com/oemparts/a/suz/6332f76e7c60483ad97a85e0/evap-system-e33

[Dai.]

I doubt you’ll pick up 30hp with cam swap.

[Bumblebee]

I doubt you’ll pick up 30hp with cam swap.

I think Moore Mafia did indeed pick up something like that in the very high rev range (11,000 or so), the Gen 2/Brocks cams picked up where the OEM cams dropped off.....so made the power curve the same as a Gen 2 basically...

[stgatev]

Thank you guys. I love the bottom and mid range of my new bike, and don't want to lose that when (if) I swap the cams. Have you heard of anyone regretting their Gen 2 cams conversion? Youtube only has videos of shops selling their service and customers paying $$$ so some bias is unavoidable.

[Bumblebee]

Thank you guys. I love the bottom and mid range of my new bike, and don't want to lose that when (if) I swap the cams. Have you heard of anyone regretting their Gen 2 cams conversion? Youtube only has videos of shops selling their service and customers paying $$$ so some bias is unavoidable.

Here's a Moore Mafia video that explains this a little....

[stgatev]

I ordered a set of Gen 2 cams. Planning to do the job myself. Brock's installation video was very instructional. I also went over the service manual, and it looks doable for someone with my level of experience.

I will appreciate any pointers and tips (lubrication, sealing the cover, cam chain tensioner removal and installation, torquing and re-torquing, etc.).

Is there a camshaft break-in procedure?

[Sl@Sh]

I ordered a set of Gen 2 cams. Planning to do the job myself. Brock's installation video was very instructional. I also went over the service manual, and it looks doable for someone with my level of experience.

I will appreciate any pointers and tips (lubrication, sealing the cover, cam chain tensioner removal and installation, torquing and re-torquing, etc.).

Is there a camshaft break-in procedure?

There is no cam break in just lubricate guides with engine assembly lube as you dont want to have dry first start, so you are good to go after swap, but I strongly suggest you to flash ecu asap as your fueling and ignition maps will be way off.