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Title: metering spring mod. Post by: drrajdeepbrar on September 14, 2012, 09:46:30 AM did a metering spring mod on my ZEN 26 cc engine for more low and mid end power off the block.
Title: Re: metering spring mod. Post by: mail4ajo on September 14, 2012, 12:45:20 PM Please post pics and details.
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