Dsr,
I recall stock is 118 for the chain. I was able to get excellent braking with the stock line. I used better pads (DP carbon fiber) and a 1992 honda cr250 brake lever. It has a slightly different leverage ratio and gave me one-finger front brakes. Plus it is a nicely shaped shorty lever. Choose the best DOT4 fluid you can buy, motul or similar. Bleed it well - you can also take the caliper off and tie it to the ceiling before bleeding but I never had to do that (my new 450 definitely- bleeding it sucks!!) I am about 230 with gear and I ran .46 kg/mm in the front and the stock in the rear. There are many posts and photos with flag mounts on the site. Do a search. Hope this helps. Cam.