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2015 "OG" Grom, See "About Me"
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BUCKNUT is correct, you can remove a link or 2 (to start with), and see what that does for your chain slack, the stock 420 chain on the Groms is not nearly durable enough, I have gone through 2 chains already by 7K miles. I personally switched up to a 428 chain and sprockets - MUCH more durable/longer lasting.
 
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