ATV Connection Magazine

400EX Spindles Breaking

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Posted by: LiveWire

Is it possible that with your new found stability, you are pushing your machine much harder than you were previously?

Posted by: dump

lets see some pictures of the 450!!!!

Posted by: mojaveaddict

Is it possible that with the additional travel that the tie rod is hitting under the frame rail that runs above it before the suspension bottoms. if that happens either the tie rod or spindle arm is going to bend or break. In your case it may be the spindle arm. Take the shocks off and move your suspension up untill there is 11.5 inches in between the shock mount holes center to center(providing you are using normal 16.25 length shocks). If the tie rods hit the frame or anything else at or before you reach the 11.5 mark, then this is your problem.

When you say you are running stock tie rods, you mean the ones that came with your +3 arms, right. You can not use factory stock tie rods with +3 arms because they would be 3 inches too short.

Posted by: 1986atc250r

What tie rods and wheel offset are you using? Maybe weaker tie rods are the answer... Much cheaper to replace tie rods than steering knuckles....

Are you breaking the spindle or the knuckle?

Posted by: speedracer83

Just wondering If anyone else is breaking alot of 400ex spindles. I didnt have any problem until i went to the 3+ longtravel a arms. Is anyone making a higher quality more heavy duty spindle with out going to a protrax type set up. any info would be apreciated.

Posted by: speedracer83

I am breaking the piece off the knuckle that controls the tie rod. the tie rods are stock, how would i find a weak tie rod made for 3+ a arms?

Posted by: speedracer83

I am using the stock tie rod ends sorry for the confusion. I am running the 19" long travel shocks
good point about hitting the frame i will have to check that but i would think the tie rod would bend or show a mark on the frame where they are hitting but there is no signs of anything hitting. I think i just had some bad luck. and the spindles had been raced on for three years maybe they are just getting fatigued after all the use.