A stock 2015 Honda Grom is good for about 9 horsepower. Over the years we’ve seen several people stuff 4-stroke CB300 motors (~30 horsepower) but this is new to me – someone’s taken a 2-stroke CR250R motor, bored it out to 325cc, and shoved it into a Grom. He claims an output of…60 horsepower.
The owner is well known in the scooter/minimoto community but I haven’t been able to find a video so I can show you what it sounds like!
Find this Grom for sale in Adelanto, California for $8,300 here on Facebook Marketplace.