So I've recently overhauld both front and rear calipers on my 1998 DTR.
Be careful when buying a rear piston and seals kit as the rear on mine was a 30mm piston and yet alot on ebay listed as rear ( even for my year) and yet were supplying 35mm piston and seals which fit the front.
I got my rear kit from YamBits which was pattern and my front kit from WeMoto which was genuine Yamaha piston and seals.
I originally ordered the Front from a seller on ebay who claimed to have sent out twice but neither were delivered. Avoid them and go Yam bits.
Front 35mm Piston and seals (pattern) - £25 from YamBits
Rear 30mm Piston and seals(Gen Yam) - £35 from WeMoto
