I've had a Moki 1.8 and Moki 2.1 over the years and have never had a problem with either, The 2.1 is extremely powerful, had it in a Midwest Cap , no cline pump and it ran flawless.

My only beef was the fuel, I replaced it with a zdz 40 but, was disappointed, the ZDZ 40 was no where close in power or smoothness, U have to go over 50cc gas to get the Moki 2.1 power.

The only advantages to gas in this displacement range are cost of fuel and no oily goo on the plane. All other advantages favour the Moki. Now those may be big advantages, U decide.

I've since moved on to larger planes and hence gone exculsively gas but, I look back very favorably on the MOKI's

Mike