Filter
Top Products
2-7
SPEC
Item
Standard
Limit
ENGINE SPECIFICATIONS
Valve springs
Free length
Intake 41.88mm (1.649in) 39.786mm
(1.566in)
Exhaust 41.88mm (1.649in) 39.786mm
(1.566in)
Installed length (valve closed)
Intake 30mm (1.18in) …
Exhaust 30mm (1.18in) …
Compressed spring force (installed)
Intake 137 ~ 157N/mm …
(13.97 ~ 16.01kgf/mm,
30.83 ~ 35.33lbf/in)
Exhaust 137 ~ 157N/mm …
(13.97 ~ 16.01kgf/mm,
30.83 ~ 35.33lbf/in)
Spring tilt
Intake … 2.5°/1.8mm
(2.5°/0.07in)
Exhaust … 2.5°/1.8mm
(2.5°/0.07in)
Winding direction (top view)
Intake Clockwise …
Exhaust Clockwise …
Valve seat reformed Yes …
Cylinder
Cylinder arrangement Forward inclined …
single cylinder
Bore × stroke 52.4 × 57.9mm (2.06 × 2.28in) …
Compression ratio 10:1 …
Bore 52.40 ~ 52.41mm …
(2.0630 ~ 2.0634in)
Maximum taper … 0.05mm
(0.002in)
Maximum out-of-round … 0.05mm
(0.002in)
Downloaded from www.ScooterTime.net