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1 Engine Specifications<br />
Spec SBK STK STD<br />
Displacement 998 cm³ 998 cm³ 998 cm³<br />
Bore/Stroke 78.0 x 52.2 mm 78.0 x 52.5 mm 78.0 x 52.2 mm<br />
Maximum engine speed<br />
(limiter controlled speed)<br />
13800 rpm 13800 rpm 13800 rpm<br />
Compression ratio<br />
13.7:1<br />
12.9:1<br />
12.7:1<br />
(recommended value)<br />
(Depend of (Depending on<br />
head-gasket the thickness of<br />
and head the head<br />
cylinder<br />
thickness and<br />
cylinder head<br />
surface<br />
grinding)<br />
gasket)<br />
Valve timing (event angle) INT. 110° 103° 105°<br />
EXT. 105° 103° 105°<br />
Squish height (minimum) 0.65 mm 0.65 mm 0.75 mm<br />
Clearance between valve INT. 1.0 mm 1.0 mm 1.3 mm<br />
and piston (minimum)<br />
(ATDC10°) (ATDC10°) (ATDC10°)<br />
EXT. 2.0 mm 2.5 mm 2.8 mm<br />
(BTDC10°) (BTDC10°) (BTDC10°)<br />
Valve (tappet) clearance INT. 0.17 – 0.23 mm 0.11 – 0.20 mm 0.11 – 0.20 mm<br />
EXT. 0.27 – 0.33 mm 0.21 – 0.25 mm 0.21 – 0.25 mm<br />
– 1 –
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