madteg
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| posted on 8/2/17 at 05:23 PM |
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CBR 954 exhaust valve
What is the purpose of this valve, Can i re-pipe the exhaust to a different position. Do i have to use the valve
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Nickp
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| posted on 8/2/17 at 05:37 PM |
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EXUP type valve? You'll be wanting to keep it I'd guess or you'll be losing a lump of torque somewhere in the rev range.
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Andy B
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| posted on 8/2/17 at 06:46 PM |
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Exhaust valve on 954 is all about smoothing power through the entire rev range - important for the bikes but not so for the cars, unlike later blades
where the ecu needs to see the motor position or you lose a lot of grunt, it is not as sophisticated on the 929/954 - you wont need the valve in the
pipework or the motor it it will not lose power
Hope that helps
Andy
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MikeRJ
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| posted on 10/2/17 at 08:26 AM |
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Honda HTEV/H-VIX and Yamaha EXUP systems change the exhaust manifold configuration from 4-2-1 to 4-1. This gives the mid range torque benefits of a
4-2-1 and the peak power benefits of a 4-1.
[Edited on 10/2/17 by MikeRJ]
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