here is the specifications for the MHR Team 86cc kit for Minarelli including the code.
3113039 Minarelli..
MINARELLI
displacement: 86,40 cc
engine type: 2(stroke)
compression ratio: 1:15,15
bore: 50 mm
cooling: H2O
power: r.p.m. 13.600: 29 cv
torque: r.p.m. 13.200: 14,4 kgm
3113040
bore: 50 mm
stroke: 44 mm
3813284
38 9513
ND
piston: 3413034
ring: 3512749B
- n.1 - 50x0,8
-
2313049B
1113209
crankshaft: 5313275
stroke: 44 mm
connecting rod length: 85 mm
crankpin diameter: 18 mm
look at those figures, they look mighty impressive, the crankshaft only has an 85mm rod much like the 2Fast crank.