[sbk1198]

I will say it's so much louder when you rev it up to 15k rpm and you're surrounded by walls on all by one side...

 

[sbk1198]

But how is it compared to the Akra?

Slightly different. Personal preference I guess as far as which sounds better. They’re both loud. I liked both. But all I4 bikes sound about the same to me…they’re all whiny regardless of exhaust lol

 

[sbk1198]

What did you do with the oxygen sensor? I installed mine yesterday and Im not entirely sure what to do with the port since Im getting the ECU flashed from TST.

Usually Yoshimura is pretty good about including plugs with their exhausts. Did yours not come with one? If not you can buy one (M18) from ebay or amazon. Once your ECU is flashed the O2 sensor is disabled so you can just unplug the connector and remove it completely.

 

[sbk1198]

I'm actually having some made so when people buy the system from me,I'll include it

Why are you having them made instead of just buying them online for $5-7 a piece? I can't imagine it'll be much cheaper if you make a couple of dozen of them.

I'm just surprised Yoshimura didn't include it. On our R7 AT2 exhaust they included 3 for all 3 ports they put on it.

 

[sbk1198]

@sbk1198 i bought some but they were heavy SS, so I'm having some aluminum ones made next door. both systems come with a bung, but not a closed off one.

That's a bad idea. There's a reason nobody puts aluminum plugs in exhausts! Ideally it should match the material the pipe is made of...so steel if it's a steel exhaust, or titanium if it's a titanium exhaust. Aluminum has a larger coefficient of thermal expansion and when it gets up to over 500 degrees which is very common for exhaust pipes it could put a lot of pressure on those thin-walled bungs and potentially crack it. Then you mess up a $1500 exhaust because you're trying to save 15 grams of weight. Also depending on the location of the bung hole, and if you're reving the hell out of the bike (think GSXR squids at a bike night), you could be flirting with temperatures near the melting point of aluminum and then you have bigger problems. Not as likely to happen, but it's a possibility. Another reason is aluminum is soft and those bungs tend to get pretty jammed in there after a while so you'll have a higher chance of rounding off the plug with the wrench when you're trying to take it off.

My opinion....stick with stainless. Save those few grams elsewhere. Of all exhaust brands I've ever seen and installed on bikes over the years that came with bung plugs or adapters, I've never seen a single one made out of aluminum.