I've done this and your looks way to narrow....lets put it this way you wont last long on it before you get a good dose of monkey butt!. I'll measure mine and show you.
Sorry about focus on some pics...you should get the idea. It took three attempts to get the seat right, first was to hard and narrow, second was still to narrow and the third I got this being about 155mm wide at the narrowest point, its also higher at the back than OE, this helped lift the narrowest point and keep a better shape.....I can live on it all day!
