Bombardier-Rotax FR 125 MAX FR 125 Junior MAX Installation And Operator's Manual page 90

Operating Instructions FR 125 MAX, FR 125 Junior MAX and FR 125 Mini MAX
Transmission ratio
number of teeth of chain wheel
on the rear axle
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
Table 2
Note: If not absolutely necessary on a certain track try not to use a chain sprocket with 11
teeth because of the heavy wear of the plain bearing used only with this sprocket.
Required transmission ratio to
reach the engine speed of
Obtained engine
5,00 5,20
speed (r.m.p.)
9.000 6,67 6,93
9.200 6,52 6,78
9.400 6,38 6,64
9.600 6,25 6,50
9.800 6,12 6,37
10.000 6,00 6,24
10.200 5,88 6,12
10.400 5,77 6,00
10.600 5,66 5,89
10.800 5,56 5,78
11.000 5,45 5,67
11.200 5,36 5,57
11.400 5,26 5,47
11.600 5,17 5,38
11.800 5,08 5,29
12.000 5,00 5,20
12.200 4,92 5,11
Table 3
Table 3 shows clearly that to reach the maximum engine speed of 12000 r.p.m. at a used
transmission ratio of 6,31 (between 6,20 and 6,40) and an obtained engine speed of 11000 r.p.m.,
the required transmission ratio would be between 6,76 and 6,98.
With these figures use Table 2 and pick an appropriate combination of chain gears. For the
required transmission ratio between 6,76 and 6,98, the chain gear matches 12/82, 12/83, 13/88,
13/89 or 13/90 can therefore be selected.
Seite/page 90/108
number of teeth of the chain sprocket on the crankshaft
11
6,55
6,64
6,73
6,82
6,91
7,00
7,09
7,18
7,27
7,36
7,45
7,55
7,64
7,73
7,82
7,91
8,00
8,09
8,18
8,27
8,36
12.000 r.p.m.
5,40 5,60 5,80 6,00
7,20 7,47 7,73 8,00
7,04 7,30 7,57 7,83
6,89 7,15 7,40 7,66
6,75 7,00 7,25 7,50
6,61 6,86 7,10 7,35
6,48 6,72 6,96 7,20
6,35 6,59 6,82 7,06
6,23 6,46 6,69 6,92
6,11 6,34 6,57 6,79
6,00 6,22 6,44 6,67
5,89 6,11 6,33 6,55
5,79 6,00 6,21 6,43
5,68 5,89 6,11 6,32
5,59 5,79 6,00 6,21
5,49 5,69 5,90 6,10
5,40 5,60 5,80 6,00
5,31 5,51 5,70 5,90
12 13
6,00 5,54
6,08 5,62
6,17 5,69
6,25 5,77
6,33 5,85
6,42 5,92
6,50 6,00
6,58 6,08
6,67 6,15
6,75 6,23
6,83
6,31
6,92 6,38
7,00 6,46
7,08 6,54
7,17 6,62
7,25 6,69
7,33 6,77
7,42 6,85
7,50 6,92
7,58 7,00
7,67 7,08
employed transmission ratio
6,60
6,20 6,40
8,27 8,53 8,80
8,09 8,35 8,61
7,91 8,17 8,43
7,75 8,00 8,25
7,59 7,84 8,08
7,44 7,68 7,92
7,29 7,53 7,76
7,15 7,38 7,62
7,02 7,25 7,47
6,89 7,11 7,33
6,76 6,98 7,20
6,64 6,86 7,07
6,53 6,74 6,95
6,41 6,62 6,83
6,31 6,51 6,71
6,20 6,40 6,60
6,10 6,30 6,49
14
5,14
5,21
5,29
5,36
5,43
5,50
5,57
5,64
5,71
5,79
5,86
5,93
6,00
6,07
6,14
6,21
6,29
6,36
6,43
6,50
6,57
6,80 7,00 7,20 7,40
9,07 9,33 9,60 9,87
8,87 9,13 9,39 9,65
8,68 8,94 9,19 9,45
8,50 8,75 9,00 9,25
8,33 8,57 8,82 9,06
8,16 8,40 8,64 8,88
8,00 8,24 8,47 8,71
7,85 8,08 8,31 8,54
7,70 7,92 8,15 8,38
7,56 7,78 8,00 8,22
7,42 7,64 7,85 8,07
7,29 7,50 7,71 7,93
7,16 7,37 7,58 7,79
7,03 7,24 7,45 7,66
6,92 7,12 7,32 7,53
6,80 7,00 7,20 7,40
6,69 6,89 7,08 7,28
Ausgabe/edition 09.2003
7,60 7,80
10,13 10,40
9,91 10,17
9,70 9,96
9,50 9,75
9,31 9,55
9,12 9,36
8,94 9,18
8,77 9,00
8,60 8,83
8,44 8,67
8,29 8,51
8,14 8,36
8,00 8,21
7,86 8,07
7,73 7,93
7,60 7,80
7,48 7,67