Harley Single Disk Conversion

What's needed to do single rotor conversion on a dual rotor Harley Davidson?

#1 - You have to get a MORE powerful single caliper. Dual disk bikes are usually heavier, thus this more powerful caliper is a must! We recommend a 6 piston caliper for this which can be purchased from us in the HHI 6 Piston Caliper, JayBrake, or the PM 6 Piston Caliper, all are nice products.


#2 - We recommend a larger diameter 13" Rotor. When you have the larger circumference rotor, the stopping power is greatly increased and they also run cooler keeping the rotor from warping in the future from high heat. A normal 11.5" or 11.8" can be used and should work fine, but if you are really about performance and being able to stop good... The 13" is the only way to go. 

#3 - The master cylinder... A 9/16 bore master cylinder is needed for a single disk bike. A 11/16 bore Master cylinder is for dual disk bikes. So if your stock master cylinder is the 11/16 bore thats made for dual disks, your brake lever will feel mushy and hard to pull because the PSI is too low for the single caliper. 
1984-2007 Harley dual disk bikes come stock with a 11/16 bore master cylinder which needs to be changed to a 9/16 bore for the single brake to work correctly. However, on 2008,2009, and 2010 Harley dual disk bikes such as Street glides, Road glides or road kings the stock master cylinder is Ok because the bore is closer to the 9/16 bore size. This is a change Harley made that turned out to be a good thing for guys converting to a single disk!

#4 - A shorter brake line to be the correct length for the new caliper. We carry the stainless steel coated line from Russell performance which is in our opinion the highest end lines available.

#5 - Simply cosmetic, The Lower legs. Dual disk legs have a bracket on the right hand side for the caliper. This can look quite ugly when a single disk conversion is done and the bracket is still hanging off. So... We carry a few different lower leg kits that have the right leg bracket removed to keep everything looking nice and neat!

Here is our simplest and easy to install Single Disk Conversion Kit ...

Lower leg and caliper conversion kit

Here are some of our wheel kits that will get you converted to Single Disk ... CALL US AT 888-926-2793 AND WE CAN SETUP A PACKAGE FOR YOU!

Adrenaline Single Disk Kit Twisted Single Disk Conversion Reactor Starkline Single Disk Kit Atomic Starkline Single Disk Kit

Contact Us to setup your own Wheel Kit AND Single Disk Conversion for a GREAT DEAL! 888-926-2793 ...


- Can I use my stock master cylinder?

A - If you have a 2008 or newer bike, Yes. If you have a 2007 or older bike, Yes... But it is not recommended and it will be very hard to pull the brake lever and it will also feel mushy. 9/16 bore master cylinder is recommended for 2007 and older bikes.

Q - Can I use a 4 piston caliper instead of a 6 piston? 
A - Yes, you can... But it is not recommended because 4 piston calipers do not have all the stopping power needed.

Q - Can I use a normal size rotor instead of a 13"?
A - Yes, but the 13" rotor being larger disperses heat better and stops the bike better.



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