Whats my top speed with new drivers? Need to gear down?

[sledstormed]

So I changed out drivers on my 09 M1000 to 10 tooth 2.52 pitch to try a different track from the stock 8 tooth 3.0. What is the stock gear ratio on the M1000 60/60???=(1.0) . I want to gear down (BDX gears) but since I went to the 2.52/10 the drivers are now 25.20" round vs. stock 24". Does anyone know the math to figure out how much MPH I gained with the larger drivers and what gearing do you guys think I need to knock her down to so I can keep the belts somewhat cooler? I tried this formula I found in a mag to figure out top speed and came up with around 120mph... doesn't sound right. (RPM divided by gear ratio X sprocket circumference divided by 12 X 60 divided by 5280) This is too much math for me but I guess it's how you firgure out top speed (other than pinning it across a lake).

 

[XFIRE800]

A lot of guys gear down to 57/63 which is the stock M8 gearing on their M1000's and really like it.

 

[1Mike900]

I have 10 tooth drivers and you are high on the MPH, Roughly 78.5 mph @ 7400rpm? If I recall it was like a 4 mph gain going to the larger drivers or vice versa. There was more of a speed loss going with the 8 tooth 3" drivers than going up one tooth on the lower sprocket! Maybe you are turning 78 to 7900 rpm to achieve that speed? There is roughly 1.0 mph gain per 100 rpm with a 2.25 gear. The ratio of the diamond drive must be geared way up like 2.15 gear? I get about 82 mph @ 7400 rpm if it is not going into overdrive thru the clutches. Snowest did a top speed test and I think the M1000 did a little over 85 mph. BDX I think has a formula to figure out the diamond drive ratio as compared to a chain setup? Different calculations!

Mike