99.999% of bikes you can just bolt (or slip) and go. No rejetting needed. Rejetting only with full.
With great freedom, comes great responsibility.
With great freedom, comes great responsibility.
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Sound comes from the internals and not the shell material. All manufacturers I have spoken to verify this. Here's a bit taken right off the Two Brothers website:
"We offer three distinct canister shapes to choose from; C2 (small oval), C4 (traditional round 4.5” diameter) and C5 (large oval). All of the canisters perform and sound the same because all of the canisters feature the same 2.25" Stainless Steel Spiral Power Core. The core is what controls the power and sound, not the shape or material of the canister. The canisters are simply different styles. They all incorporate our exclusive technology and premium construction material. The different exterior shapes allows you to choose the one that best fits the style of your motorcycle. For instance most people prefer the C2 (small oval) with smaller sized motorcycles (like 600cc machines) while others prefer the C5 (large oval) with larger sized motorcycles (like 750cc or 1000cc machines). For those who prefer round canisters we offer the C4 (round)."
They are going one step further, in saying that size AND shell material don't alter the sound, it's the internals (packing and design of the core)... which is why Hindles sound different than Akrapovics which sound different than Yoshimura. Each brand has their own unique sound, and some brands offer different sounds (eg/ Yosh has a RACE can and a ZYCLONE or street-legal can)...
Check it out yourself at www.twobrothersracing.com. Hindle and Akrapovic and Yosh reps have all told me the same thing.
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"Keep yer feet on the pegs and your right hand cranked."
"We offer three distinct canister shapes to choose from; C2 (small oval), C4 (traditional round 4.5” diameter) and C5 (large oval). All of the canisters perform and sound the same because all of the canisters feature the same 2.25" Stainless Steel Spiral Power Core. The core is what controls the power and sound, not the shape or material of the canister. The canisters are simply different styles. They all incorporate our exclusive technology and premium construction material. The different exterior shapes allows you to choose the one that best fits the style of your motorcycle. For instance most people prefer the C2 (small oval) with smaller sized motorcycles (like 600cc machines) while others prefer the C5 (large oval) with larger sized motorcycles (like 750cc or 1000cc machines). For those who prefer round canisters we offer the C4 (round)."
They are going one step further, in saying that size AND shell material don't alter the sound, it's the internals (packing and design of the core)... which is why Hindles sound different than Akrapovics which sound different than Yoshimura. Each brand has their own unique sound, and some brands offer different sounds (eg/ Yosh has a RACE can and a ZYCLONE or street-legal can)...
Check it out yourself at www.twobrothersracing.com. Hindle and Akrapovic and Yosh reps have all told me the same thing.
The Yosh Race will definately draw attention.
I'll also second what psyclone posted.
Yellow '01
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I'll also second what psyclone posted.
Yellow '01
SacCity, is it running rough at all anywhere in the powerband right now? Any stutters at low rpm? Ever stall on you? Abnormal carbon deposit on the tailpiece of the can? Minor "bogging" at any part of the rpm range? Those are more serious signs, but a dyno can even detect more minor signs and help you find the proper setup for tweaking with a jet kit.
If it's running perfect in your mind, I don't think I'd bother.
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"Keep yer feet on the pegs and your right hand cranked."
If it's running perfect in your mind, I don't think I'd bother.
From http://www.yoshimura-rd.com/faq.asp --
Q. Do I have to rejet my bike?
A. Yoshimura recommends that you rejet your carburetors or remap your EFI anytime a full exhaust system is installed on your sportbike. With slip-ons, it may not be necessary to purchase a jetting kit per-se, but it is important to at least adjust the pilot mixture screws and shim the needles 0.5-1.0mm.
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Dave Lee
Red '02
Open Throttle Sport Riders
Q. Do I have to rejet my bike?
A. Yoshimura recommends that you rejet your carburetors or remap your EFI anytime a full exhaust system is installed on your sportbike. With slip-ons, it may not be necessary to purchase a jetting kit per-se, but it is important to at least adjust the pilot mixture screws and shim the needles 0.5-1.0mm.
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Dave Lee
Red '02
Open Throttle Sport Riders
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