I replaced my front master cylinder with a "76 type single master cylinder" that is on MikesXS. It has a 16mm bore. I also had to use a different style brake switch that is pressure activated,its a banjo bolt pressure switch. I replaced the brake line with a SS braided one and rebuilt the caliper including a new piston and used DOT3 fluid. My front brake is just fine. I am tempted to get another rotor or maybe find a compatible one that is slotted or drilled purely for aesthetics.
On the fuel note, throw the vacuum petcock away dont try to rebuild it. I wasted money on a rebuild kit and it just doesnt work. I got a manual petcock and I always turn it off even when I stop for a few minutes. Replacing the needles and seat valves is a good idea too.
I also buy the best gas I could, which is usually 91-93 octane. It helps slightly with things like detonation and keeps carbon deposits lower and you kind of need that with aircooled engines that get hot. Also, Our bikes dont have ECUs to retard timing obviously like modern engines do.
On the fuel note, throw the vacuum petcock away dont try to rebuild it. I wasted money on a rebuild kit and it just doesnt work. I got a manual petcock and I always turn it off even when I stop for a few minutes. Replacing the needles and seat valves is a good idea too.
I also buy the best gas I could, which is usually 91-93 octane. It helps slightly with things like detonation and keeps carbon deposits lower and you kind of need that with aircooled engines that get hot. Also, Our bikes dont have ECUs to retard timing obviously like modern engines do.