yoshimura zyclon....help - Honda Motorcycles - FireBlades.org
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post #1 of 12 Old 12-31-2006, 7:52 AM Thread Starter
 
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yoshimura zyclon....help

hi i am new here and just got a 99 mod cbr 900rr
there is a yoshimura RS3 zyclone slipon on the bike but it is werry quiet...
how can i get it to do the "right" sound if you now what i meen...? i want it louder !!
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post #2 of 12 Old 12-31-2006, 11:36 AM
 
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Re: yoshimura zyclon....help

Swap it with a race can. Zyclone is supposed to be quiet
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post #3 of 12 Old 12-31-2006, 11:41 AM Thread Starter
 
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Re: yoshimura zyclon....help

dont have that money, can i "custum" it to be louder ?
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post #4 of 12 Old 12-31-2006, 1:11 PM
 
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Re: yoshimura zyclon....help

Take the can off and look down it. Can you see though it? If you can't make it so you can.
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post #5 of 12 Old 01-01-2007, 10:14 AM Thread Starter
 
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Re: yoshimura zyclon....help

i can see though it, no ideas how to make it louder ??
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post #6 of 12 Old 01-01-2007, 12:05 PM
 
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Re: yoshimura zyclon....help

If you hack it up then your left with a piece of crap.
Put it up for sale and use the money for a new one.
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post #7 of 12 Old 01-01-2007, 12:15 PM
 
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Re: yoshimura zyclon....help

just a couple of thought, and don't know if it will work, but....if its riveted at the ends, drill them out. this will give you access to the baffling by removing the ends. one option is to remove the fiberglass packing, another is to make the slip on shorter. my exclaimer would be that it could end up sounding tinny, or could work like you want it. if your dead set on messing with what you've got, give it a try...
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post #8 of 12 Old 01-01-2007, 2:16 PM
 
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Re: yoshimura zyclon....help

Quote:
Originally Posted by truff1 View Post
If you hack it up then your left with a piece of crap.
Put it up for sale and use the money for a new one.
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post #9 of 12 Old 01-02-2007, 12:14 PM
 
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Re: yoshimura zyclon....help

contact yoshimura. You can buy the race baffling, drill out the rivets and replace the quiet baffles with the race baffling. It cost around $30 or you could pull some of the original baffling out of it and put the endcap back on , start it up and see if its loud enough, if not take more out until its loud enough for your taste.
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post #10 of 12 Old 01-03-2007, 6:50 PM Thread Starter
 
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Re: yoshimura zyclon....help

i did drill out the rivets and removed the "end" cap in the front side of slipon,
then welded on a 20cm long pipe on the endcap so that the exos go tru pipe and past half of all the smal holes that makes it so quiet...
the diameter on my pipe and the beginning of the innside of the can is the same so dont think the smaal thiknes of my pipe shoud slow exos flow down, becouse in the end cap (back) of the yoshi is moore narow than my pipe...
did put in new rivets and now you cant even se that it have been opend
not mutch diffeerens on 1000rpm but when i rev it the nice sound come at one's (the animal is alive )
cant wait to drive it now

Last edited by CBR900RRR; 01-04-2007 at 3:04 AM.
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post #11 of 12 Old 01-06-2007, 10:41 AM Thread Starter
 
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Re: yoshimura zyclon....help

does enybody now if it is important with back-pressure on slipon's or is it "the bigger and moore open, the bether" ?

Last edited by CBR900RRR; 01-06-2007 at 12:48 PM.
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post #12 of 12 Old 01-06-2007, 4:50 PM
 
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Re: yoshimura zyclon....help

Back pressure helps make torque, too much and it will choke the exhaust alittle. but I would guess that changing the amount off back pressure would change the air/fuel mixture. not sure tho
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