Section02717ENGINE
Subsection 06 (TECHNICAL SPECIFICATIONS)
TECHNICAL SPECIFICATIONS
ENGINE GTI
Engine type ROTAX 717, 2-stroke
Induction type Rotary valve
Type Water cooled, water injected
Water injection fitting (head) 3.5 mm (.139 in)Exhaust system
Water injection fitting (cone) 3.5 mm (.139 in)
Starting system Electric start
Fuel/oil mixture VROI (Variable Rate Oil Injection)
Oil injection pump Gear driven
Lubrication
Oil injection type
XP-S
TM
synthetic 2-stroke or XP-S
TM
synthetic blend
or XP-S
TM
mineral injection oil
Number of cylinders 2
Standard
82 mm (3.228 in)
First oversize 82.25 mm (3.238 in)Bore
Second oversize 82.50 mm (3.248 in)
Stroke 68 mm (2.677 in)
Displacement 718.2 cm³ (43.81 in³)
Corrected compression ratio
6.2:1
Cylinder head volume
42.4 ± 0.4 cc
Cylinder head warpage (maximum) 0.05 mm (.002 in)
Piston ring type and quantity 1 semi-trapez — 1 rectangular
New 0.25 - 0.40 mm (.010 - .016 in)
Ring end gap
Wear limit 1.00 mm (.039 in)
New 0.025 - 0.070 mm (.001 - .003 in)
Ring/piston groove clearance
Wear limit 0.2 mm (.008 in)
New (minimum) 0.10 mm (.0039 in)
Piston/cylinder wall clearance
Wear limit 0.20 mm (.008 in)
Cylinder taper (maximum)
0.10 mm (.004 in)
Cylinder out of round (maximum)
0.080 mm (.003 in)
New 0.311 - 0.677 mm (.012 - .027 in)
Connecting rod big end axial
play
Wear limit 1.2 mm (.047 in)
Crankshaft deflection MAG: 0.050 mm (.002 in) PTO: 0.030 mm (.001 in)
Opening 147° ±5BTDC
Rotary valve timing
Closing 65.5° ±5ATDC
Rotary valve duration 159°
Rotary valve/cover clearance 0.25 - 0.35 mm (.010 - .014 in)
New 0.020 - 0.033 mm (.0008 - .0013 in)
Connecting rod/crankshaft
pin radial clearance
Wear limit 0.050 mm (.002 in)
New 0.020 - 0.033 mm (.0008 - .00013 in)
Connecting rod/piston pin
radial clearance
Wear limit 0.05 mm (.002 in)
ADDITIONAL INFO
RMATION:
smr2005-086 57
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