High performance two-stroke engines develop much of their power from the design of the exhaust system. Any damage or leakage (air in or leaking emissions) from the exhaust assembly will seriously impair the performance. Worth a check over? Yes, a close inspection would be better!
Replace any damaged or suspect parts to ensure top performance.
More related parts you may wish to consider:
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Please note; this component may have other applications within the Yamaha model range including motorcycles, outboard engines and utility vehicles.