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Engine, Intake, Exhaust:
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Lightened Arias 280cc piston
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Carillo Rod
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Genuine HRC grind cam
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Lightened Rockers
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36mm Mikuni flat slide owners specs
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"Big Fin" Mod to head.
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Head Ported by Dave Stuart
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Titanium R&D Valve spring kit
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Lightened Flywheel
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K&N Air Filter (XR600 one)
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Cobra Exhaust
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Later replaced with FMF unit.
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Dyno'ed at similar figures to current XR400's
Protective gear:
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Barkbuster style handguards
Drive:
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