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  1. REV-XR/XS Chassis: 4-TEC 1200 Perf. & Trail Models
    The 1330 ACE as configured will not make a high performance replacement for the 1200. Look at the engine specs. 1330 ACE: Bore and Stroke 84 mm x 80 mm 1200 4-Tec: Bore and Stroke 91 mm x 60 mm So what?? The 20 mm longer stoke will limit max RPM but that may be a good thing since...
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