Jeff,


This engine should be capable of significantly more than that RPM on the first break-in tank.

It actually needs no more than 500 cc of fuel to be fully usable, after break-in.

And as to break-in, it must be done as described [link=http://www.rcuniverse.com/forum/m_1850473/tm.htm]here[/link].


Please check that the cylinder sleeve in the engine is perfectly aligned with the intake bypasses and the exhaust port.

Although MVVS engine are made from tough materials and gain RPM significantly (400-600 RPM) within 6-10 hours, it is not what I expect for your engine, with the current RPM.

With the MVVS #3250 pipe, on an APC 14x8, this engine should show 9,700-9,900 RPM and even with the #3255 muffler, or #3267 Pitts, it should show more than 9,000.

I believe something is not completely right with this engine, unless it is a VERY heavy 14x8.