JK3,
That engine is actually a clone of a Honda engine so nothing unique about it being a China motor. I don't have any EPA restriction on my DF now.

I upped the main jet to a 100 over my DF's stock 88 but according to Gardo you already have a 98 but it might be worth a check to verify that. I put a washer under the needle to richen up the mid range.

But we still have a push rod 229cc engine and there is not a lot of power to be had there.

I tried chasing this one down but no luck.
http://www.alibaba.com/product-gs/42...ne_engine.html


Engine Type498cc oil-cooled ,single cylinder, 4-stroke ,SOHC engine Bore & Stroke 92.8mm * 73.6mmCompression ratio9.2 : 1Fuel SystemCarburetorMaximum Output40.8kw / 7800rpmMaximum Torque39.3N.m / 5500rpm IgnitionDC-CDIStartingElectric & KickGearshift5-speed , international gear shiftFinal Drive520 chain