top speed

[Kurly154]

Is there any way to caluate the top speed on a 87 250x?

[firefighterjosh]

GPS

[hornetgod13]

Trail Tech carries a full line of computers that you can mount to track MPH, miles driven, time riden, and maintenance reminders.
http://trailtech.net/store/computers.html

[2muchquad]

Mine will probably do at least 100mph under these conditions:D

[bsjoe]

well, if you want to get into it, find your max rpms, gear ratio for 5th gear or what ever your max gear is, sproket sizes, and rear wheel diameter.


Post it on here and I could help ya out, maybe if i get more time later today or tommorow i could google some of those for you, but if you put aftermarket tires/sprockets, you'll have to post that.

[firefighterjosh]

find out your feet per second then go to this site (http://www.calculateme.com/Speed/FeetperSecond/ToMilesperHour.htm) and plug in the info

[Kurly154]

my guess on the max rpms would be 8500 front sprocket is 14 tooth back is 39 tooth my back tires are 21*11*9

[400exrider707]

Originally posted by Kurly154
my guess on the max rpms would be 8500 front sprocket is 14 tooth back is 39 tooth my back tires are 21*11*9

Then figure out wind resistance as well as rolling resistance....not gonna happen...just a theoretical number is all your going to get.

[NY06400EX]

+1 ^^^^

GPS is your best bet like the guy a few posts up mentioned. It's the most accurate you are going to get short of a radar gun.