whats the best mixture for running in vertex 2.95cc engine and do i have to go easy for the first litre or so eg dont use full revs or so the hobby shop guy reckons
for that engine i dont know, but my trx 3.3 runs great on 20%. as for the first liter, if its a new engine break-in is a must. there are a couple of methods. i know there are threads on breaking in a motor on here, take a look at those. maybe someone else might know the best mixture to run for that motor, but from what i have read, its kind of a personal preference.