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OUR SERVICE TECH- BOB WILDER'S YAMAHA ROADSTAR- STOP IN AND CHECK IT OUT!! 
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- Installs on your crankcase breather hose
- Controls the air under the pistons by maintaining the proper amount of vacuum in the crankcase at any rpm
- Better seal is achieved due to an increased pressure differential across the compression ring
- Designed to give a 2-7 horsepower increase, with a deeper motor sound
- Comes apart for easy cleaning
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