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Discussion Starter · #1 ·
I picked up the parts required to complete the 400EX front spindle and 250R caliper conversion, or so I thought... I bought what I was told was a set of 400EX spindles, hubs, and rotors, and then I also bought a set of PRP 250R brake caliper adaptors. The thing is, the adaptors don't line up with the holes on the spindles. Are there different year 400EX spindles? Different year adaptors?

Here are some pics of the spindles, hubs, and rotors that I bought.







Here is a pic of the adaptor.



Here are some pics trying to show how the bolt holes don't line up.







Here is a pic of the setup that was advertised by the seller of the adaptors with his 400EX hubs.



Any help here with this would be greatly appreciated. Or else I just wasted a bunch of money...
 

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I have that set up on my quad. Let me know how I can help. If you want pics or measurements. Maybe the adapters you have are for z400 or something. I think all years of the 400ex spindles are the same so there shouldn't be any difference there. All years for the R brakes are the same, I think.
 

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It's hard to measure with everything installed, but the holes in my spindles look like they are about 3.25 inches apart. I noticed the adapters that you have say "R" on them. Maybe you have z400 spindles.
 

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Discussion Starter · #4 ·
I actually found out that these are 04-05 450R spindles, hubs, and rotors :angry: I'm currently working with the seller to see what we can do about them, as I bought them thinking that they were 400EX parts, and of course bought the adaptors as well. I didn't realize the mixup until I received both parts and tried putting them together. I know people have done the 450R brake conversion, but I think that I'd rather have the 400EX setup, just so I know everything will work out. Thanks for the response though.
 

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i was thinking those spindles looked wrong. buy a set of 04-05 450R calipers and your set. the 450R conversion is very easy. i had the 400ex conversion set up on my quad, and my brother had the 450R setup on his. i liked his better.
 

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Discussion Starter · #6 ·
i was thinking those spindles looked wrong. buy a set of 04-05 450R calipers and your set. the 450R conversion is very easy. i had the 400ex conversion set up on my quad, and my brother had the 450R setup on his. i liked his better.
Oh yea? What were the differences that you noticed from the 400EX to the 450R? Why was it better? Hmm... So all I need are the calipers and thats it? Nothing else?
 

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i had the 400ex conversion set up on my quad, and my brother had the 450R setup on his. i liked his better.
Was the handling better or the braking better or both?
 

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the breaking was better, but im sure if i were to clean and rebuild my calipers again they would have been just as good. the biggest difference was handling. as you can see in the pictures the 400EX spindles put the hub much farther away from the ball joints than the 450R spindles. in the 3rd picture you can see that the 450R spindle is quite narrow while in comparison the 400ex spindle in the last picture is a lot wider. you want to keep your tires as close to the ball joints as possible, think 3:2 wheels compared to 4:1 wheels. the 400ex spindles are 3:2 wheels the 450R are 4:1
 

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here are some pictures of 450R spindles to compare to. There arnt any different 400EX spindles, so they have to be 450R. You need 450R hubs and calipers for them to work.




 
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