Bike Motorcycle Yoshimura
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Kawasaki Exhaust Systems
Quill Exhausts Limited & JB Racing, offer a full range of KAWASAKI exhaust, including the Quill EVO2, Quill T3, Quill Tri-Oval, in stainless steel, carbon fiber, titanium, in bolt-on or with a link pipes. Quill offer a full range bike accessories (accessory) including. Quill KAWASAKI motorcycle (motor bike) exhaust, / Quill headers / Quill Full systems. available in 100% stainless steel, with an exclusive range of 100% titanium silencers and full KAWASAKI motorcycle (motor bike) KAWASAKI exhaust, systems for performance bikes. JB Racing offer a large range of KAWASAKI motorcycle accessories including the following products: Micron, Yoshimura, Arrow Exhausts, headers, Full Systems. Dynojet, Power Commander, K&N, K & N, Motad, Ohilns, PFM Brakes, DP Brakes. The Quill EVO2, Quill T3, Quill Tri-Oval, in stainless steel, carbon fiber, titanium, in bolt-on or with a link pipes. Quill offer a full range bike accessories (accessory) including. Quill Exhausts / Quill headers / Quill Full systems.
To meet demand, we have recently developed a new Quill exhaust silencer – the EVO2 - based on the same principle as the original full race silencer......but it’s just got bigger and better. available in 100% stainless steel, with an exclusive range of 100% titanium silencers and full exhaust systems for performance bikes.
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Bike Motorcycle Yoshimura Questions
Motorcycle Muffler Re-Engineering?
I would like to replace the stock muffler with a better looking aftermarket muffler and have some difficult engineering questions.
The bike: Suzuki DRZ-400 Supermoto (single cyl).
New muffler: Yoshimura TRS carbon fible tri-oval. Designed for GSX-R 750.
What I Want (Ideally): -Cut approx. 5" off length of sleeve (to look 'stubby').
The Difficult Part: I'd like the stubby exhaust to be as quiet (or close) to stock and prefer to cancel higher frequencies.
The stock muffler is 4" dia with very thin shell of glasspack and what seems to be a series of staggered opening 'plug' style baffles.
The Yosh muffler is a straight through perforated baffle (approx 2.25" dia pipe) style.
My initial ideas: to restore backpressure and lower dB, fabricate a series of staggered plug baffles (similar to stock) that fit inside the 2.25" Yosh internal baffle. The plug baffles could be interchanged, removed, added, etc to a common spine slipped in at flange.
Professional Advice Appreciated.
Singles are the toughest to quiet down. Without extra exhaust pulses working to cancel each other out, you've got a thumper that's always going to make a big BANG.
That's the main reason why we can have some relatively small muffler systems on twins and multis that are pretty quiet - but the big singles still have bazookas for mufflers.
Currently, with the best minds and technologly in the world working on this issue, here's the options:
Volume equals less noise and more power - larger mufflers are quieter and less restrictive. Increasing diameter is best, but length is important too.
The best baffling and packing system in the world will only reduce sound output by a few dB. The rest is done with volume.
It's the reason Honda and some other manufacturers have been testing twin mufflers on their MX'ers. Less sound without sacrificing power - by doubling the muffler volume.
Weight. Lighter weight mufflers made of aluminum or metal will have a 'ring' to them that adds to the exhaust sound level somewhat. Heavier materials are more dense and don't 'ring' as much.
Backpressure is cool, but too much on the DRZ as a street bike is not a real good idea. Make sure you're not increasing the backpressure by more than what the stock system does.
Without a dyno and some other good (and expensive) diagnostic equipment, it'll be tough to really gauge what you're doing to the power, what jetting changes it'll require, etc.
I'm not saying you shouldn't have fun messing with a few options here - but don't expect to come up with something really earth-shattering. My guess is you'll be able to make a shorty muffler that's either too restrictive, or ear-shattering!
Good Used yamaha/honda Motorcycle and Aftermarket shops in the san fernando valley?
I am looking to buy a bike soon, and am looking at the Yamaha YZF-R6s and the Honda CBR 600rr. Does anyone know of any good dealerships that sell good used bikes, aftermarket shops that I could get a Yoshimura TRC carbon slip on exhaust, and shops that sell riding gear that are in the san fernando valley preferrably in the woodland hills area?
go to Corona Yamaha
951-738-8111
Ask for Larry,
Tell him you were referred by Tony, the old sales Manager. tell him tony says give you a good deal.
He is a very fair and honest guy, if can make a deal happen he will.
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