I have used many Clines on 2 strokes, from 40 up to 1.60 woithout a hitch, but had a problem with Cline/Saito 72.Could not get the engine to run reliably,it would quit at various throttle settings. If you are mounting the tank as recommended and have inverted the engine,I think you can go without the Cline,just make sure the carb is closed before you fuel it up and start the engine right away once you have turned on the trans/rcver for starting.Throttle cut on a switch helps doing this.Also,the setup for Cline/4 stroke calls for using the muffler tap for pressure,not the crank case tap.I think the 4 str. crank case pressure is too much for a Cline, but have never tried it to see.I have called Cline once or twice with questions,they are helpfull,might be good idea to call them about it first.