Engine; Carburetor - Beta EVO 2T Handbook

1

ENGINE

Version
Type
Bore x stroke
Displacement [cm
Pressure ratio
Fuel system

CARBURETOR

Version
Certif. Competition* Certif. Competition* Certif. Competition* Certif. Competition*
Carbure-
tor type
Main jet 112
Slow jet
Start jet
Needle
Needle
position
(from top)
Air screw
turns
(from all
1/2
closed)
Spacer
* Such modifi cation makes the vehicle non-compliant with the road regulations
in force. Its use must be limited to the sole private circuits which are closed to
circulation.
Cooling system ......................................... forced liquid circulation by pump
Spark plug ............................................................................ NGK BR7ES
Clutch .................................................................................. wet, multidisc
GB
EVO 125
Single-cylin-
der, 2-stroke
54 x 54
3 ] 123.6
16.1:1
carburetor
without mixer
( 1,5% )
EVO 125
PWK 28
130 x
35 55 x
60 60 x
JHL JJH x
2° 4° x
1 1
+ + x
1/2
YES NO x
EVO 200
Single-cylin-
der, 2-stroke
64 x 60.5
194.6
11.8:1
carburetor
without mixer
( 1,5% )
EVO 200 EVO 250
PWK 28 PWK 28
125 42
48 105
60 60
JJH LKK
4° 4°
2 3
+ +
1/2 1/2
NO YES
12
EVO 250 EVO 300
Single-cylin- Single-cylin-
der, 2-stroke der, 2-stroke
72.5 x 60,5 79 x 60.5
249.7 296.5
8.9:1 10.2:1
carburetor carburetor
without mixer without mixer
( 1,5% ) ( 1,5% )
EVO 300
PWK 28
125 102
48 42
60 60
JJH JHQ
4° 2°
2
+ 1/2
1/2
NO YES
125
48
60
JJH
4°
2
+
1/2
NO