Well I did a search for this but didn't find anything, I have a 91 XR250R with stock 13T-48T gearing but I thought I would go to a 51T rear sprocket to help with low-end even more since thats where I need it anyways, I read that the a XR250R with stock gearing will go around 70mph, Does anyone know what one would go with 13T-51T gearing? Would this make it alot easier to wheelie(that trail junk can be some gnarly stuff when you plow into with that front tire)? WOuld my bike accelerate faster? I never go above 45mph anyways, I found some 51T sprockets at XRsonly.com for $49.99 but how many links would I have to add to my chain and where could I buy extra links? I have a Renthal Gold Chain and size is 520x108. Thanks in advance for the help guys and thanks for taking time out of your busy lives to answer this, Matt