Just a word of advice not only to you but to all bikers with pressure gauges. I never liked the idea of a hi pressure oil lines outside of the engine case. My conversion not only has the line to the gauge but also the line that routs pressurized oil to the return line. Check your hose condition regularly for bulging, poor connections etc. If one of those pressure lines pops off the pressure on the bearings goes essentially to zero and the oil is pumped to the street.
OTOH, good oil pressure is key on any plain bearing motor.