Suggestions for Replacement GS650E front master cylinder

[prichmon]

The front master cylinder from my 1981 gs650E has stopped pressing fluid. It also looks like crap. Is there a satisfactory aftermarket unit which looks similar and works correct that the forum could suggest?

Thanks

Rich

[Rich82GS750TZ]

Why not get OEM piston/cup set available from your dealer or online sites like this for @$50. Clean everything well and put it back together. Also get a new gasket for the cap, new fluid too. You should find a tutorial on BikeCliff's website. I believe that's where I found it when I did mine last winter. Wire-wheel the scrubby looking paint and give it a fresh coat too. Good time to upgrade your brake line to braided stainless steel while you're at it.

[salty_monk]

EX650 is the one I've used a lot. Mirror mount, adjustable lever... new enough & cheap! (The newer ones have no mirror mount & are a slightly different shape, more oval than square).

Same bore as the original & a very similar feel whether used with stock calipers or Kawasaki Twinpots.

https://www.ebay.com/itm/07-Kawasaki-Ninja-EX650-EX-650-Front-Brake-Master-Cylinder-100G/151709712481?hash=item23529a8061:g:RZUAAOSwrklVZRza

https://www.ebay.com/itm/Front-brake-master-cylinder-EX650-kawasaki-07-I7/112106915708?hash=item1a1a17c77c:g:ANoAAOSwU-pXvOfu

[prichmon]

Thanks for the replies!!!!

I looked at rebuilding the old unit but it needs a full rehab. Powercoating is coming off and the reservoir has alot of surface cracking.

I'll pick up a ex650 one shortly.

I appreciate it guys

[prichmon]

How or where is the brake witch bolted or activated?

[prichmon]

Found it. Thanks all!!!

[salty_monk]

It's a microswitch on the EX650. You'll need to cut the wire off the old one & add a couple of spade connectors (or make up a new wire with spades one end & bullets the other). They are in the headlight bucket.