L/RM 252
Type
Piston displacement
Stroke
Bore
Compression ratio
247
cm³
(15.057 in³)
66
mm
(2.598")
69
nun
(2.7165")
7:1
CHAMPION
BOSCH BERU
L86C, L87YC
W7AC 175/14C (Heat value 145-225)
0.5
mm
(0.020")
M 14x1.25
-
12.7
mm
long
2.8
-
3.2
mm
(0.110" to 0.126")
Spark plug
Spark plug gap
Spark plug thread
Timing BTDC
Breaker point gap
0.3
-
0.4
mm
(0.012" to 0.016")
Minimum Maximum
Ignition system 12 Volt/40 Watts
primary
resistance
internal ignition coil,
1.60
Ohms
5,300
Ohms
N/A
2
.00
ohms
5,800
Ohms
internal ignition coil,
secondary resistance
internal ignition
generating coil
Ignition system 12 Volt 75/98 Watts
external ignition coil,
primary resistance
0.80
Ohms
7,800
Ohms
0
.90
ohms
9,200
Ohms
external ignition coil,
secondary resistance
internal ignition
generating coil
(bottom coil with black wire) 3.0
Ohms
0.43
Ohms
3.7
ohms
0.53
Ohms
lighting coil (12 Volt 75 Watts)
(with yellow and yellow/black wire)
lighting coil 12 Volt 23 Watts
(top coil with green and green/black
wire)
condenser
0.24
0.20
mm
(.008")
0.30
0.40
mm
(.016") air gap, coil to flywheel
Fuel
Mixture ratio
(2%)
Regular
fuel or regular lead-free fuel
Important:
During initial break-in period (approx. 20 hours)
use fuel/oil mixture ratio of 25:1
(4%)
Use special two-stroke oil, e.g.
CASTROL SUPER
TT;
ARAL SUPER 2T; ESSO (EXXON)
AQUAGLIDE, etc.
If not available, use oil SAE 30 or 40 or known brand
Lubrication oil
Locking compound
Sealing compound
LOCTITE No. 241
/
CASCO No. 148
b
4
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