Can a blaster do 91 MPH?

Id guess you need 14/40 with 22" tires and a motor that will push some good HP at 10000 to pull the rider weight.. Everything2Stroke has a Gearing Calculator, have a look>>> Everything2Stroke - Gearing your 2-stroke

9500 rpm
2.88 Primary Gear
0.91 Top gear
14 Front Sprocket
40 Rear Sprocket
20 Rear Wheel Diameter figures to 75 mph which is about what I was getting

Currently running:
9500 rpm
2.88 Primary Gear
0.91 Top gear
12 Front Sprocket
44 Rear Sprocket
22 Rear Wheel Diameter figures to 64.7 mph which is slightly faster than my last couple GPS speed checks, but the weather is cold and it slows down the pipe.

It shows me that jumping up to enduro 0.78 5th gearing would put the top speed up to 75mph as is (12/44) or 96.87 mph with 14/40 and the 22" tires. My favoured combination is 14/44 and 20" tires which shows 68.6 mph, still a bit fast. May have to go 13t for 63.7 mph when I get a good set of 20" tires.

Nice thing this calculator, I like it!

Steve
 
9500 rpm
2.88 Primary Gear
0.91 Top gear
14 Front Sprocket
40 Rear Sprocket
20 Rear Wheel Diameter figures to 75 mph which is about what I was getting

Currently running:
9500 rpm
2.88 Primary Gear
0.91 Top gear
12 Front Sprocket
44 Rear Sprocket
22 Rear Wheel Diameter figures to 64.7 mph which is slightly faster than my last couple GPS speed checks, but the weather is cold and it slows down the pipe.

It shows me that jumping up to enduro 0.78 5th gearing would put the top speed up to 75mph as is (12/44) or 96.87 mph with 14/40 and the 22" tires. My favoured combination is 14/44 and 20" tires which shows 68.6 mph, still a bit fast. May have to go 13t for 63.7 mph when I get a good set of 20" tires.

Nice thing this calculator, I like it!

Steve

You got a 2.88 primary reduction ratio??? What did you put in to get that? The stock primary reduction ratio is 3.227 and the top stock gear is 0.9047, Im guessing you rounded it up to 0.91, or is it somthing different to?