TECH - 2FAST

SOME OF THESE SPECS ARE NOT THE SAME AS IN THE MANUAL - BUT THIS DATA WAS SENT TO ME DIRECTLY FROM THE OWNER OF 2FAST IN DEC OF 2021

 

RING GAP
47.60mm Bore     .18mm (+- .03mm)
50.00mm Bore     .20mm (+- .03mm)
52.00mm Bore     .28mm (+- .03mm)

IGNITION TIMING STAGE6/POLINI 
70cc  3.55 to 3.65mm
86cc   3.80 to 4.10mm
90cc   3.90 to 4.30mm
94cc   3.80 to 4.10mm
100cc 4.30 to 4.70mm

IGNITION TIMING - MALOSSI MHR II
70cc   1.55mm MAP 2/3/4/5
86cc   1.6mm MAP 2/3/4/5
90cc   1.6mm MAP 2/3/4/5
94cc    1.6mm MAP 2/3/4/5
100cc   1.65 to 1.75mm MAP 2/3/4/5

IGNITION TIMING - MALOSSI MHR I
70cc     2.15 to 2.25mm
86cc    2.20 to 2.40mm
90cc    2.30 to 2.50mm
94cc    2.20 to 2.40mm
100cc   2.30 to 2.50mm

SQUISH
70cc   0.45/0.55mm or
86cc    0.60mm or 23.62"
90cc  0.65mm or 25.59"
94cc   0.70mm or
100cc 0.70/0.80mm or 

LOWER CASE BORE SIZE
50cc cases for a 50cc cylinder with crank 2fast 39.3-85 d.75 bore size 76.5
50cc cases for a 70cc cylinder with crank 2fast 39.3-85 d.75 bore size 76.5
50cc cases for a 90cc cylinder with crank 2fast 45.8-90 d.77,8 bore size 79/79.5
50cc cases for a 86-94cc cylinder with crank 2fast 44-90 d.76 bore size 77.5/78
50cc cases for a 100cc cylinder with crank 2fast 47-95 d.79 bore size 80.5/81