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Im sorry But I really had to comment on this....thats all wrong.. a 250ex top speed is anywher between 42-46 mph, 300 EX is between 53-56 and a 400 ex is around 64-68mph and Im not postive about these but I know for a fact im closer then these guys.....I have a 450R and its got above 75 mph stock and ran with 400s and I cant completly destory 400s so thats how I came up with my guesses
agree with fox12, have both the 300 and 400 and thows are right, no idea about the 250 thow, my buddie had a 98 recon and it did about 45 with a good tail wind, he had more miles on it than my car thow. haha
yeah i agree with you also fox, i put a pipe, jets, air filter and box and razor back tire and i didnt get to much faster my buddy has a grizzly with a 3 mph off at the rev in 5th gear about 55, 56 so i say with all the add ons about 50 to 55 almost need to do something with the gears but it dont have sprocket.
a 300ex was between 50-54 my 300ex now needs to be checked because i have a 14th sporket 22in tall tire and a new cdi for 1100 more rpms but my guess with all the mods would be about 60 mph.theirs till more mods needed to beat a 400ex but im taking the eazyway buying a fastier quad.