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1998 300ex 12 hours on 300cc rebuilt motor. 11.1 compression runs pump gas. 400ex carb fmf exhaust herman +3 a-arms works shocks. white powdercoated swing arm extended .4" works rear shock. +2 axle. nerf bars.updated mairer plastics,double beadlock rear wheels and fresh holeshot mxr tires. front kendal klaws mxf. The arms could use some paint. Seat has a couple rips and front rims and rear bumper are a little beat up otherwise great running fast bike. 1500. firm location Fredericksburg va.
 

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mine goes 300ex goes 75mph all ur guys bikes are small
 

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Lol

Hay dude i meant to say its a 330 and im running a 14 38 sprokets and we took it out on the black top and my cousin fallowed me in his car and i was pushen 75mph. So wat know.:icon_censored:
 

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Kudos for you!!!!!!!!!!!!!!!!!!!!!!!!!
Hay dude i meant to say its a 330 and im running a 14 38 sprokets and we took it out on the black top and my cousin fallowed me in his car and i was pushen 75mph. So wat know.:icon_censored:
 

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With those upgrades I can see hitting in the 60's. 75 is pretty damn fast. I would like to see your top speed recorded on GPS.

Sounds like you have an impressive machine, but the 400's struggle to hit 75.
 

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Agree^^^^ I have seen a couple 400ex hit in the 70s but its rare usually quad that are built around here are MX so hitting that is out of ???? Gearing is not that High. My buddy's 400kfx hits in the high 70s but it is sick!!! Its a trail quad. A stock 300ex barely does 50mph. I would have to see it to believe it.
 

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it moter was built to a 330 it running a supper trap short can 400ex nerfs plus 4 in back and pluse 2 in the front 400es carb and 14 38 sprokets thats all i know and im 12 but i know a lot about atvs and me and my cusin speed check it on black to and hes said i was goen 75mph
 

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Pacing with a car is the most inaccurate way to test. I'm not saying you don't have a nice ride, just not likely to go that fast.
 

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Then we also had my cuz fallo me on his rapter 660 it has a speed domater and it said 75 and he was righ beside met to
 

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My buddy hit about 72 maybe a little more on his 400EX but he was laying down below the bars and that was running beside my car. My 250 will run maybe 58 to 60 we haven't speed tested it yet I don't want to do it with worn A-Arm bushings and inner tie rods, that would not be good at all!!


I bet 69quadracers quad will do 75!!! and then some lol
 

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[COLOR="Red"yah and we also speed tested it i waz leaning over the handel bars and had about a 1\2 mile to to get my bike up to 75 and it did
 

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redracer was that your 450 and wat ur cell number i send u a video on ur phone ok
 

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I don't think giving out cell numbers on line is a good idea but find away to post it on youtube so we all can witness.



redracer was that your 450 and wat ur cell number i send u a video on ur phone ok
 
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