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View Full Version : What's the top speed?


krt400ex
05-24-2006, 01:20 PM
Does anybody know the top speed of a stock 400EX? Mines stock and my friend told me that it's lucky if it will do 55mph. I think he's full of garbage. I was guessing that it will do between 60 & 65. What do you guys have to say?
400exrider720
05-24-2006, 01:25 PM
what year is it?
krt400ex
05-24-2006, 01:38 PM
It's an '05.
miller821
05-24-2006, 02:12 PM
It will be around 65-69.... Depends about the surface, and a lot of things.
bigbearkid4x4
05-24-2006, 02:21 PM
Originally posted by ride hard man
It will be around 65-69.... Depends about the surface, and a lot of things.

that should be for the 04s and bakc since they had 14 tooth front sprockets. 05's and newer should do around 62-67 or around there. def. faster than 55 lol. any 400ex should do at least 60-65
procircuit406ex
05-24-2006, 02:32 PM
Originally posted by bigbearkid4x4
that should be for the 04s and bakc since they had 14 tooth front sprockets. 05's and newer should do around 62-67 or around there. def. faster than 55 lol. any 400ex should do at least 60-65

05's have 14 tooth front sprockets
miller821
05-24-2006, 03:40 PM
Originally posted by bigbearkid4x4
that should be for the 04s and bakc since they had 14 tooth front sprockets. 05's and newer should do around 62-67 or around there. def. faster than 55 lol. any 400ex should do at least 60-65
The 05 and 06's are the ones with 14 tooth front... There about the same top speed as the 99-04' (Which have a 15 front) because they changed the internal gearing in it.... But it will def. do over 55.
rodeo#11
05-24-2006, 09:19 PM
i think there use to be a post about this a while back and it had this gearing calculator on it. www.home.earthlink.net/~gellett/mph.htm (http://www.home.earthlink.net/~gellett/mph.htm)
TacomaNC4X4
05-24-2006, 09:37 PM
130
priebo15
05-24-2006, 10:13 PM
i road next to an xr650 and clocked it at 67 on asphault.. '06 though so might be a bit of a difference since its brand spankin new.. well was..
krt400ex
05-25-2006, 09:49 AM
Originally posted by priebo15
i road next to an xr650 and clocked it at 67 on asphault.. '06 though so might be a bit of a difference since its brand spankin new.. well was..

'05s and '06s are exactly the same except for the black plastics. Mines brand new also. I bought it a month ago as a leftover. Thanks. I thought it went faster than 55.
priebo15
05-25-2006, 09:52 AM
oh i know.. but i figured maybe you've ridden yours quite a bit more than i've ridden mine since its an '05
jibbers93gt
05-25-2006, 09:43 PM
Yeah I would think stock you could pull 60-65mph.

I see people comment a lot about the differences in gearing between the 99-04 and the 05,06's....I have an 05 and my friend has an 04 and they are really close to the same top speed, his is slightly faster. Probably 1-2 mph.

Just my experiences.
boricua
05-25-2006, 09:54 PM
:chinese: bottom line.....will do ova 55 mile per hour......
allangeiger3
05-25-2006, 10:02 PM
wut do u think a 2000 400ex would do with a 416 kit and exhaust and little more?
priebo15
05-25-2006, 10:05 PM
probably 68-70 from what i know the 416 doesnt add much more speed.. just quite a bit more torque
firefighterjosh
05-25-2006, 10:53 PM
My friend has a 99 400 and I clocked him at 67MPH.

I have a 416EX with HMF Pipe, and It will beat a Stock Z400. Not sure about the speed. I think a Piped Z400 Would beat it.
jsmith2232
05-26-2006, 06:40 AM
my 416 with mods in sig will run within a half of a mile an hour as it did with the pipe and filter only, i gps ed it at 69.2 and 68.9 mph.
firefighterjosh
05-26-2006, 01:22 PM
Originally posted by jsmith2232
my 416 with mods in sig will run within a half of a mile an hour as it did with the pipe and filter only, i gps ed it at 69.2 and 68.9 mph.

Is it runninng right??:huh What gearing are you running?