450R Front End Conversion for TRX250R

This is a run through of the parts involved in converting a TRX250R over to a TRX450R front end. Basically, you just buy the 450R parts and bolt it up.

Mistakes I made in the video:
I said the offset from the wheel to the hub is the same, mean to the ball joints
I said nothing of the 450R is interchangeable, the brake rotors are the same for the 250R, 400EX, and 450R.

When I did this, Honda was charging only $45 per brake caliper. The whole conversion set me back about $550 because I bought each bolt and washer new. Also, the hubs were pricey, being the same as an aftermarket set. Now the hubs are dirt cheap but everything else is expensive, so maybe it's only a little more to do now.

Good luck, and keep this 250R's running!

Category:

Autos & Vehicles

Tags:

• Honda
• TRX250R
• 450R
• front
• end
• converion

[screamingdemon]

What offset are you running on your wheels? I did this swap and with the stock wheels the inside of the wheel rubs my upper a-arm before it hits the stopper. I'm running Lonestar +2+1 sport arms with 04 450r brakes...thanks!

[rustyATV]

@screamingdemon My current setup is 4-1 wheels on Laeger +1 arms. From pictures, it looks like the Lonestar could be wider on top, however this is the first I've heard of any fit issues.

[bigt185]

i know that the 53521-HP1-600 are for the 06+ 450r's and er's and the 53521-HP1-000 is for the 04-05 450rs... the 04-05 are supost to be alittle more sporty and wider thats why the -000 are longer

[rustyATV]

@bigt185 I'm pretty sure I bought BOTH of those part numbers back in '04 and '05.

[hmftrx300ex]

are the calipers dual piston?

[rustyATV]

@hmftrx300ex Yes, the 450R calipers are dual piston. Sorry for not replying sooner!

[bigt185]

@rustyATV maybe the longer ones are for if u buy like +1 a arms u can still use hondas if something happends to them

[rustyATV]

@gbaby22112 None of the 250R or 400EX hubs fit the 450R spindles. You have to get the 450R hubs. Fortunately, these dropped in price so you might check servicehondadotcom and see what they're running for. I believe the brake rotors are all the same for the 250R, 400EX, and 450R, BUT, the BOLTS that hold the brake rotors to the hubs are different on the 450R vs the 250R. Good luck!

[gbaby22112]

my dad gave me his breaks of his 05 trx450. if i buy the 05 spindle/knuckle from honda, will it fit my stock hub and disc?? i have a 1987 250r

[RustyCyler]

I have the 400ex conversions on my two 250Rs, and the 400ex brakes are inferior, they're only single piston calipers, the 400ex spindles are aluminum though. I run the 400ex calipers on one of my Rs, the other has the caliper adapters so I can use dual piston 250R calipers.

great vids BTW, keep em coming.