subject: smaller master cylinder to improve front brake

[Norm Keller]

#ygrps-yiv-90998580 blockquote.ygrps-yiv-90998580cite {margin-left:5px;margin-right:0px;padding-left:10px;padding-right:0px;border-left:1px solid #cccccc;} #ygrps-yiv-90998580 blockquote.ygrps-yiv-90998580cite2 {margin-left:5px;margin-right:0px;padding-left:10px;padding-right:0px;border-left:1px solid #cccccc;margin-top:3px;padding-top:0px;} #ygrps-yiv-90998580 .ygrps-yiv-90998580plain pre, #ygrps-yiv-90998580 .ygrps-yiv-90998580plain tt {font-family:monospace;font-size:100%;font-weight:normal;font-style:normal;} #ygrps-yiv-90998580 {font-family:Tahoma;font-size:12pt;} #ygrps-yiv-90998580 .ygrps-yiv-90998580plain pre, #ygrps-yiv-90998580 .ygrps-yiv-90998580plain tt {font-family:Tahoma;font-size:12pt;} I just installed a 250 Ninja master cylinder off Ebay to test the effect on front braking. http://www.ebay.com/itm/370886528553?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649   Yep, $25.00 delivered..... It includes reservoir, banjo bolt & washers, brake light switch. It took about 15 minutes to remove the stock master, install this one & bleed. I will pump it up and bungee the brake lever over night to see if there's any more tiny air.   The lever is longer, has stroke adjustment and just fits with my bark busters. After lubing the pivot points, the braking effort is very significantly reduced. The front brake is improved as indicated by shorter stopping distance and increased front end dive being apparent. I think I'll keep it on the bike.   This master has a 10 mm bore as opposed to the stock 12 mm which about 50% increase in application pressure, all things being equal. There seems also to be a bit of application slack (clearance) like with the original KLR master so will play with inserting some shim stock while checking to make certain that the compensating port remains clear.   One caution is that I don't think that this will work with the stock front hose because the expansion of the hose under pressure is estimated to reduce application volume too much for the smaller master cylinder delivered volume.   I still plan to do the dual piston caliper upgrade at some point and then assume that this master will not produce enough volume.  It will be interesting to see the effects. For $25.00 which I can recoop when someone needs a master on a smaller bike...way-the-hay?

[bigburlybaldbeardedbiker]

Norm suggested I send this to the group to see: [u] [/u][u]http://www.vintagebrake.com/mastercylinder.htm[/u] Paul Streeter Minnesota, USA