Originally posted by jjmudd
Goldfinger you are wrong. The piston on the RR series of motors is Microcast not CNC.
RR12L3
RR12L5
Displacement
2.1 cm^3
Maximum power
1.54 cv 1.62 cv
R.P.M.
40.800 g/min 43.300 g/min
Bore x Stroke
13.70 mm x 14.25 mm
Ports nr.
3
5
Piston type
Microcasted
Crankshaft Ø 11.5 mm
Type EFRA SG Turbo SG
Glow Plug Type Turbo
Exhaust Type Rear
Carburetor Ø 5.4 mm (interchangeable insert)
Type Slide
Material Aluminium Alloy
Taken from Nova Rossi website.
http://www.novarossi.com/default.htm
Yeah, I could be wrong. 2 days ago when i check nova site for crankshaft pn. I notes that, And Im confused.
The RR piston is having 2 oil pit and having same colour/finishing with 1st generation of NS12, while they releasing NSR. Equipped with microcasted piston (they said) darker colour but still 2 groove, exactly the same with MAX P series.
Couple month after it, MAX is releasing S series. Piston has a brighter finish than previous P version but only have 1 oil pit.
Soon after that, NSR is releasing newer batch with ported sleeve(3port) and lighten crankshaft(5port) and the piston is exactly the same with MAX S series.
Dunno about newer RR, but in here the piston is still not changing.
Please open/borrow your friends NSR piston you will notice the difference.
I still could be wrong though....