Hi ram3500-RCU..
Thanks for your advice. To compare a 26cc and DL50...;

SV 26cc
Engine type: single cylinder, 2-stroke, air-cooled
Bore x stroke: 34 x 28mm
Piston displacement: 25.42cc
Max. power: 1.75KW(2.35hp)/8,500rpm
Max. torque: 1.5NM/7,500rpm
Rotate speed: 1400-9000RPM
Compression ratio: 8.4:1
4.8-6V Electronic ignition
Carburetor: Walbor pump type/diaphragm
Start mode: Electric Start
Dimensions: 190 x 120 x 220 mm
N.W.: 1215g(with muffler and electric ignition)

DL-50 Spec.
CDI Electronic Ignition.
Walbro Carburettor
Performance: 3.88KW(5.2hp) @ 7500rpm
Idle: 1350rpm
Thrust: 13.6kg @ 100mtr / 11.5kg @ 1800mtr (Above sea level)
Suggested prop: 22x8, 22x10
Spark Plug: NGK CM6
Bore/Stroke: 43 x 35mm
Compression: 7.5:1
Weight: 1350g
Fuel: 2C Regular Gas mixed 30:1 - 45:1
Walbro membrane pump carburetor with manual choke
Automatic advancing electronic ignition

There's a different of 135g in weight. and huge in different in power...Ya, I agree, that would be more than over powered. Do you think the SV26 will be just enough for it? I actually want it to be slightly over powered, but I can't find a gasser slightly bigger than 26cc. I know there is one, SPE28cc, but the carb. is on the side of the engine, not behind it. I'd rather not make any hole on the cowling, to maintain the scale look.

Would this extra weight of 135g affect the performance by so much..?