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 07-Jul-2009, 22:10 | #4 |
| Registered Forum User Big Twin Bikes: Ducati 749, Phil Read Replica, DD 620  Posts: 1,830 Join Date: Mar 2008 Location: Coventry Mood: 2011 DD Class 'B' Champion Ideally you want a master cyl piston area to cumalative caliper piston areas of 27:1 down to approx 23:1 Any less than this the lever is very hard and you have no feel for modulation, that lack of feel can also give a switch like tendancy to lock up the front. Liken it to squeezing a rubber ball as against an egg, you can modulate the ball pressure easily but the egg through lack of feel just gives. I was running a 916 I think master with one disc, yes it stopped but the lever was very hard. I have 4x34mm pistons in the caliper. I did the sums and I was at 13:1 ratio. So I now have a master with a 14mm piston this gives me a ratio of 23.6:1 and the modulation is great, trying it around an industrial estate. Oulton will be tried in anger.  | |
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