ORIGINAL: bbest12
To update the last post the 51 tooth sprocket does not match the tooth pitch of the clutch bell! Oh well, it was worth a try. There is just not much detailed info out there.
You can use any Hpi savage clutch bell to change your gearing. Smaller tooth will give you more low end, bigger tooth for more top speed. A two tooth smaller bell will give you a noticeable difference. Are you running bigger tires? Personally, I felt the Volcano was one of the models that was geared just right. It has decent low end and top speed. I guess if your just interested in wheelies it would be worth doing, but other than that I think you'll be disappointed with its overall performance unless you are running bigger tires and are trying to compensate for it
http://www.ebay.com/itm/NEW-HPI-Raci...item4d00cced67