Driven Racing EVO TECH rear sprocket for Honda Grom and Monkey 125cc with 428 chain. Driven Honda Grom and Monkey 125 rear sprockets are available in 34t, 35t and 36t options.
The stock rear sprocket size on the Honda Grom is 34 tooth. You can go up to 35t or 36t to increase your low end acceleration.
A few rules regarding gear ratios for sprockets are as follows: Drop teeth on front/add teeth to rear = increased torque, increased acceleration, wheelies, racetracks with short straights Add to