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Jean Michel Crettaz
Joined: 06 Aug 2010
Posts: 76
Location: United States, California, LOS ANGELES
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 Posted: Thu Aug 09, 2012 5:27 pm Post subject: Birel S4 compared |
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| Who had the chance to race the RY-32 S4, and can comment if the "new" chassis lives up to the hype and expectation of a much improved chassis over the previous S1/2/3 models. |
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Marc Miller
Advertiser
Joined: 18 Jul 2001
Posts: 1834
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| Posted: Mon Aug 20, 2012 11:07 am Post subject: |
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I have driven all of them... in a real testing situation. We take the effort to spend time with each new chassis on various tires (bridgestone and mojo - we rarely throw MG's at it because MG's can make just about anything feel good  ) in various configurations and the S4 model has improvements, including the floating, self-adjusting hydraulic brake system. It is a unique system that has both a floating vented cast-iron rotor, as well as 4 individual floating pads set in a 4-piston caliper.
I can't comment much on the "hype" - but the results have proven to be strong with the same RY30-S4 chassis winning in Rotax, FWT and WKA Senior and Junior yamaha/hpv configurations.
Personally, I feel the S4 is every bit as solid as the S4 with slight improvements in braking "feel" due to the new brake design as well as a lighter steering and slightly larger window of tuning.
We have already tested the S5 as well - or at least a test model.
_________________
"Luck is when Preparation meets Opportunity"
Director of Brand Development (MRP/Birel) www.BirelAmerica.com /
Advanced Instructor - MRP Speed Schools - www.mrpmotorsport.com
Professional Driver/Driver Coach - http://www.themarcmillershow.com |
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