Converting from Drum Brake Rear to Disc 1979 GS550

[Haett0325]

Hello,
I am inquiring on if its possible to convert a 1979 Suzuki GS550B, which has a drum brake assembly to a GS550EC with the disc brake. If there's a Youtube video or a thread already describing the process that would be amazing! I haven't started the conversion yet just fishing for information. Seems like i would need a new wheel, caliper, master cylinder, and disc but is this typically a direct bolt on replacement if i can find the parts?

Or is there a different rim/caliper/disc that is a direct swap that wouldn't require a ton of extra modification. It seems the rear wheel assembly is available on ebay with varying levels of completeness.

 

[unfocused]

You also need the caliper bracket, the caliper stay ( long tube ) The GS650 should be a direct bolt up. Someone correct me if I'm wrong.

 

[Big T]

The disc brake swingarm is required
Plus, you need to see if your frame has the mounting bracket for the master cylinder.
Also the brake pedal and pivot.
Either 550 E will be your source for parts

 

[Who Dat?]

You also need the caliper bracket, the caliper stay ( long tube ) The GS650 should be a direct bolt up. Someone correct me if I'm wrong.

If you do go with a 650 swingarm, make SURE it's from a 650E.

 

[oldGSfan]

Good luck, I always found the Suzuki rear disc brake to be about as good as it gets. nice feel and power. But man, it's a big mutha! Per Ed (Nessism) suggestion I put in organic Ferodo pads, NOS probably many years old. They are great. Properly set up the Suzukis stop as hard as I need, but you need Kung Fu grip.