GStwin.com GS500 Message Forum

Main Area => General GS500 Discussion => Topic started by: Dave C on May 31, 2026, 05:24:02 AM

Title: Gs500k7
Post by: Dave C on May 31, 2026, 05:24:02 AM
Hello, I'm having trouble fitting new brake caliper pistons to my gs500 k7.
I bought rebuild kits for the front and rear calipers from wemoto and the pistons are bigger than the old ones and will not fit.
The old pistons measure 30mm front and 38mm rear. I'm a bit confused as to whether someone has fitted the wrong calipers or I've been sent the wrong size pistons. I'd be grateful if anyone can shed some light on this please. Thank you 🙏
Title: Re: Gs500k7
Post by: herennow on June 01, 2026, 01:23:12 PM
Have you looked in the factory manual, they probably have the service dimensions for the different years. If you dont have it I can share a copy.