It's the other way around; the smaller bore gives you more brake affect with the same pedal pressure. The downside is you run out of pedal if you need more fluid movement than the smaller bore can deliver. It's like using a hand pump with a big cylinder versus one half it's size. Like a 125psi tire on a racing bicycle, you can't push hard enough to move a big piston, they're 1/2" diameter in bike pumps.
I've had a BMW 900 for over 30 years. It has twin disks up front and a 17mm master bore. The factory changed to a 15mm a couple of years after my bike was made. That was done after enough complaints of needing a superman grip to slow the dam thing. Today they would have a 12 or 13mm in there, as peeps like a 2 finger brake that can lock the front wheel.LOL
I've got the 4 piston discs on my '70 Camper Special F-250. Everything stock and it'll work up and down in the Sierras with a 10 foot camper in the bed and a trailer with 4 Huskys in it being towed.
You really need a good booster with discs because you don't have the self-energizing deal like when drum shoes are trying to jam themselves against the drums...it's all just how hard the booster will boost.
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Today's Featured Article - Sunday Drives - by Cowboy. Summer was finally upon us here in Northern Maine. We have two types of industry up here, one being "Forestry" (Wood Products) and the other "Farming" (Potatoes). There is no shortage of farm tractors and equipment around here! I have been restoring old Farm Tractors for the past 6 years, and have found it easier and less expensive to hit all the auctions and purchase whole tractors for parts needed. My wife who works at a local school, and only has weekends and summers off, while on t
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