So, I have RPM forward controls on my bobber. I have found out that they have gone out of business. My rear master cylinder is leaking and needs to be rebuilt. Any one know of a rebuild kit that will work on this? Thanks

 

Wouldn't your master cylinder still b hd?

 

Some pics would help.
Is there a size stamped on the cyl anywhere?

WP

 

Master cylinder is RPM. It has a 5/8 bore.

 

Safe bet any standard 5/8" R&R kit will work, usually those aftermarket MC's used off the shelf generic internals. Do a double check on the bore size most rears are 3/4", fronts is were it gets squirrely with bores.

 

Yea, I was surprised to find this one has a 5/8 bore. Haven't found one yet that has the same type of dust cover.

Went to Ace Hardware, got a new o-ring for the plunger and a snap ring to hold everything in place. So far it is holding fluid.

Hope I don't have to buy new forward controls just to fix the brake issue. LOL

 

Here is a pic of the offending control.

 

That's very neat. As for a gasket, just buy some blank gasket sheet and cut your own. Thick card will probably do. Nobody need ever know!

 

The cover gasket is fine. I'm more concerned with the dust "boot", "Cover", that goes on the end of the master, where the brake rod enters the master. None of the rebuild kits that I have found so far comes with anything that matches. The "boot" has the snap ring built into it, I had to get a nylon washer to take up the space for the boot and a snap ring to hold everything together. I rode it about 50 miles or so, in town so a lot of stop and go, so far no leaks but, I know with out the boot, trash will get in there and it won't last long.

Still looking.

 

I would go to a local indy or chopper shop with the old parts and see if they can be matched.
There are a few different styles that have the same bore.

Some catalogs have pic of the actual parts in the kit.