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June 2011 Vol 11-1 - Tech Talk: Proud or Loud? PDF Print E-mail
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Monday, 23 May 2011 18:57
Article Index
June 2011 Vol 11-1
Motorcycle Diaries: Hop & Malt (part one)
Tech Talk: Proud or Loud?
Globalizer: Wheels go for Wings in Brazil
Pic of the Month: Lover-boy, beware
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Tech Talk: Proud or Loud?

Seems like I finally found a compromise between the two

 

“Ride proud, not loud”, “Loud pipes save lives”… Every motorcycle rider is familiar with these sayings. And at some point every rider has to choose which side he or she belongs to. As for me, I’ve always been somewhere between – and in doubt. Each V-Star 1100 owner knows that stock pipes are virtually silent. When a stock V-Star passes by, all you can hear is a sound of a sewing machine, right? But when you are on the bike, you hear all sorts of sounds: ticking, clicking, whining or even roaring at high revs. This cacophony was not exactly what I expected from a cruiser bike. So one of the first things I bought for my scoot was a set of Cobra Speedster Long pipes. If you have ever seen and heard them, you know it’s a beauty and a beast – all in one. It looks like a beauty, but it’s a nasty beast when in comes to sound. The good part of it is power gain. It looks like a two-in-two system, but works like a two-in-one. So, being paired with a MaxAir Predator Pro kit it increased the maximum power of my bike from 39 hp to 62 hp*! Another good part was that car drivers heard me coming and I didn’t hear the noise of the engine anymore. But the bad part was that after a 700-mile trip I couldn’t hear anything at all for a day or two. Something had to be done. So I set down to surf the Net looking for a solution.

 

What I found was a set of 24” Cobra Quiet Core Baffles for about $30 each. Unlike the regular straight-through baffles, which come with Cobra pipes, these new baffles have three internal sections. Also, I got a set of 2.25” Hard Kore Quiet Baffles for another $70. They are inserted in the pipes from the rear and are basically restrictors, reducing the diameter of the pipe’s exhaust ports by about 40% (that’s my estimate, not an exact figure). Cobra Quiet Core Baffles came in first, reducing the sound just marginally, but eating up about 5 hp of power. I wasn’t happy with that, so there came the Hard Kore Quiet Baffles too. Peak power dropped to a mere 49 hp (but still 10 hp over stock), but the sound – Bingo! – was just what I wanted. That was a real cruiser-style low-frequency rumble. I know you can never have too much power, but I am a traveler rather than a drag racer. So I never really regretted loosing those 13 hp. The engine’s response is now smoother and I can rev up to 100 mph and still have some reserve on the throttle. The sound is still louder than stock, enough for car drivers to notice me. But the ear-splitting roar is now gone. By now I rode over 60,000 miles on my V-Star, most of them long-haul trips, using the exhaust setup I just described. Well, I can still enjoy music and I talk to people without asking them “what did you say” all the time. So I guess I found a compromise between proud, loud and life-saving tone of my pipes.

 

* All power measurements mentioned herein are courtesy of Multipass Moto workshop in Moscow, Russia. All power measurements were made at the rear wheel using a DynoJet dynamometer.



Last Updated on Monday, 23 May 2011 20:18
 
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