CZ 250 Specs
  64-66 TwinPipe 250 67-69 SidePipe 250 70-72 YellowTank 250 73 "Radial" 250
Engine/Frame ID 968 980 980.3 - 980.4 980.7
Bore/Stroke (metric) 70mm X 64mm 70mm X 64mm 70mm X 64mm 70mm X 64mm
Stock Carb 2930 sz12 30mm Jikov 32mm Jikov 33mm Jikov
Horsepower 26 28 31 31
Compression Ratio     10.5:1 10.5:1
Primary Drive 2.304:1 (23/53) 2.304:1 (23/53) 2.304:1 (23/53) 2.304:1 (23/53)
1st Gear Ratio 1.846:1 (13/24) 1.846:1 (13/24) 1.846:1 (13/24) 2.45:1  (11/27)
2nd Gear Ratio 1.466:1 (15/22) 1.47:1 (15/22) 1.466:1 (15/22) 1.85:1  (13/24)
3rd Gear Ratio 1.18:1 (17/20) .072:1 (17/20) 1.18:1 (17/20) 1.46:1 (15/22)
4th Gear Ratio 0.95:1  (19/18) 0.95:1  (19/18) 0.95:1  (19/18) 1.23:1  (17/21)
5th Gear Ratio     n/a 1.11:1  (18/20)
Teeth: C/S Sprocket 14 14 14 14
Teeth: Rear Sprocket 62 62 62 52
Susp Travel - Front 6.7" 6.7" 6.7" 6.7"
Susp Travel - Rear 3.3" 3.5" 3.5" 3.5"
Weight 214 (Dry) 238 (Wet) 227 Dry 227 Dry
Tires 2.75X21, 4.00X18 2.75X21, 4.00X18 2.75X21, 4.00X18 2.75X21, 4.00X18
Rims 1.60X21, 1.85X18 1.60X21, 1.85X18 1.60X21, 1.85X18 1.60X21, 1.85X18
Ignition ADV. 2.8 - 3 BTDC 2.8 - 3 BTDC 2.8 - 3.0 BTDC 2.8 - 3.0
Fuel Capacity 2.5 Gal 2.5 Gal 1.8 Gal 2.5 Gal
Std Bore 69.95mm 69.95mm 69.95mm 69.95mm
1st Over (+.25) 70.20mm 70.20mm 70.20mm 70.20mm
2nd Over (+.50) 70.45mm 70.45mm 70.45mm 70.45mm
3rd Over (+.75) 70.70mm 70.70mm 70.70mm 70.70mm
4th Over (+1.00) 70.95mm 70.95mm 70.95mm 70.95mm
Price (MSRP) N/A $1,075 N/A N/A
  74 Red Frame 250 75-76 Falta 250 513 73 "ENDURO" 250
Engine/Frame ID 980.9 980.5 513 988
Bore/Stroke (metric) 70mm X 64mm 70mm X 64mm 70mm X 64mm 70mm X 64mm
Stock Carb 33mm Jikov 33mm Jikov 36mm Jikov 33mm Jikov
Horsepower 24.5 26.8 25.8 24
Compression Ratio 10.5:1 11.5:1 12.2:1 9.5:1
Primary Drive 2.304:1 (23/53) 2.304:1 (23/53) 2.690 (21/55) 2.304:1 (23/53)
1st Gear Ratio 2.45:1  (11/27) 2.454:1 (11/27) 1.846:1 (13/24) 1.90:1 (9/28)
2nd Gear Ratio 1.85:1  (13/24) 1.846:1 (13/24) 1.466:1 (15/22) 1.17:1 (13/25)
3rd Gear Ratio 1.46:1 (15/22) 1.466:1 (15/22) 1.294:1 (17/22) 1.00:1 (15/22)
4th Gear Ratio 1.23:1  (17/21) 1.235:1 (17/21) 0.947:1 (19/18) .072:1 (17/20)
5th Gear Ratio 1.11:1  (18/20) 1.111:1 (18/20) N/A .061:1 (19/19)
Teeth: C/S Sprocket 14 14 14 18
Teeth: Rear Sprocket 52 52 58 52
Susp Travel - Front 7.75" 7.87" 270mm 6.7"
Susp Travel - Rear 3.6" 5.0" 170mm 3.5"
Weight 231 Dry 231 (Dry) 107.5kg 262 Dry
Tires 2.75X21, 4.50X18 2.75X21, 4.25X18 3.00X21, 4.75X18 2.75X21, 4.00X18
Rims 1.60X21, 1.85X18 1.60X21, 1.85X18 1.60X21, 2.15X18 1.60X21, 1.85X18
Ignition ADV. 2.8 - 3.0 3.2 2.5mm 2.8 - 3.2
Fuel Capacity 2.1 Gal 2.1 Gal 8 liters 3 Gal
Std Bore 69.95mm 69.95mm 69.95mm 69.95mm
1st Over (+.25) 70.20mm 70.20mm 70.20mm 70.20mm
2nd Over (+.50) 70.45mm 70.45mm 70.45mm 70.45mm
3rd Over (+.75) 70.70mm 70.70mm 70.70mm 70.70mm
4th Over (+1.00) 70.95mm 70.95mm 70.95mm 70.95mm
Price (MSRP) N/A $1565 (75) N/A $1,295