Dual Piston Caliper Swap

[NickisGod]

i original seen the idea brought up by chariot performance asking the HQ about dual piston calipers. so me being impatient, i cant wait for chariot performance. a few people have already successfully swapped out there banshee calipers with trx250r and chimed in on chariots post. i got the general idea of what was involved, but i jumped into this blind and came out on top. So heres what i did.

 

First off your going to need a round house banshee swingarm, otherwise this will not work. given you have the correct swingarm arm you will also need a trx250r brake stay, C ring puller, 4 washers, trx250r caliper, bench grinder and Hybrid rotor.

 

Step 1. you will notice when you receive you brake stay that there is a milled spacers on the surface. this has to be removed in order to fit on your carrier. i used a bench grinder and grinded little at a time until it was perfect.

after you grind it, it should look like this and fit like that.

 

Step 2. so after you have your brake stay on and you axle back on, you will notice your caliper will not bolt on. this is because the banshee brake hub will not clear the caliper, and modification is required again. i took my bench grinder and ground about a half inch into the alumium and made an arch effect.

 

 

Step 3. Step 3 should be pretty self explanatory. you will need 2 pairs of washers to shim out the caliper from brake stay, bolt your custom disc onto your hub, check your hubs clearance with the caliper, bleed brakes and tighten everything down and enjoy.

 

here are some pics of the spacing of the washers, and some various other comparisons pics.

 

 

and a few comparisons pics that i borrowed from the site.

 

my rotor was cut by JDS or 87sheerips, honda used a 7.10inc disc vs yamahas 8.5inch, this increases ground clearance while adding braking performance. contact him for your own! my purpose for writing this is to help out anyone whos fed up with yamahas shitty rear brakes. it always nice to have directions when staring a project so you dont have to learn the hard way, gl and enjoy

[87sheerips]

AWESOME right up man, and i am glad to have helped you out on this project!! So now I am on the hunt for a 250R rear caliper!

[trickedcarbine]

Nick, if you can come out of hiding and fix your pix, that'd be greeeaaaaaat.

[Keno]

Hmmmmm, I wonder if JDS could cut a brake stay for this to make it easier.

[Toybreaker]

take 30-45 min on a prototrak mill. Too bad I don't have one anymore

[Keno]

Also if you are wanting to increase brake performance, ideally, you would want to keep the yamaha's larger diameter rotor. A larger rotor takes less clamping force than a smaller rotor, while dissipating heat better. Thus, a custom brake stay thay allows the use of a dual piston caliper with the yamaha rotor would be the better of the options, unless you were really needing the ground clearance.

[NickisGod]

i original seen the idea brought up by chariot performance asking the HQ about dual piston calipers. so me being impatient, i cant wait for chariot performance. a few people have already successfully swapped out there banshee calipers with trx250r and chimed in on chariots post. i got the general idea of what was involved, but i jumped into this blind and came out on top. So heres what i did.

 

First off your going to need a round house banshee swingarm, otherwise this will not work. given you have the correct swingarm arm you will also need a trx250r brake stay, C ring puller, 4 washers, trx250r caliper, bench grinder and Hybrid rotor.

 

Step 1. you will notice when you receive you brake stay that there is a milled spacers on the surface. this has to be removed in order to fit on your carrier. i used a bench grinder and grinded little at a time until it was perfect.

after you grind it, it should look like this and fit like that.

 

Step 2. so after you have your brake stay on and you axle back on, you will notice your caliper will not bolt on. this is because the banshee brake hub will not clear the caliper, and modification is required again. i took my bench grinder and ground about a half inch into the alumium and made an arch effect.

 

 

Step 3. Step 3 should be pretty self explanatory. you will need 2 pairs of washers to shim out the caliper from brake stay, bolt your custom disc onto your hub, check your hubs clearance with the caliper, bleed brakes and tighten everything down and enjoy.

 

here are some pics of the spacing of the washers, and some various other comparisons pics.

 

 

and a few comparisons pics that i borrowed from the site.

 

my rotor was cut by JDS or 87sheerips, honda used a 7.10inc disc vs yamahas 8.5inch, this increases ground clearance while adding braking performance. contact him for your own! my purpose for writing this is to help out anyone whos fed up with yamahas shitty rear brakes. it always nice to have directions when staring a project so you dont have to learn the hard way, gl and enjoy

Edited June 17, 2021 by NickisGod

[NickisGod]

out of hiding now. this post is old af and some of my earliest work. i think theres more to be done here. maybe ill revisit this in the fall for anyone whos still reading this. 

[kawa110]

That’s a 250r rear caliper and brake stay? I like the idea of more ground clearance.


Sent from my iPhone using Tapatalk

[NickisGod]

9 minutes ago, kawa110 said:

That’s a 250r rear caliper and brake stay? I like the idea of more ground clearance.


Sent from my iPhone using Tapatalk

yes. but others mentioned that a rear braking would benifit from a larger rotor if it would fit. something i plan on revisiting when time permits.

[kawa110]

I am not concerned with braking power as the oem locks the wheels when pressed hard enough. Just Need some tread on tires at that point to build or stack the dirt to stop.

I am more interested in the ground clearance.


Sent from my iPhone using Tapatalk