After months of speculation all over the internet in various
discussion board/forum, Yamaha has officially announced the much awaited
figures of the R15.
With the rumors quoting power of the bike in excess of
20bhp, the official figure stands at 17PS. Reading the response, I believe
Yamaha officials were very smart in keeping the figures secret until the last
day else the comments like following would have been floating on the various
discussion forums for months.
“Just 17PS”
“My XYZ bike makes more power”
“My ABC bike is just behind in power”
After all discussing all about a bike, without even test
riding it, is a born right of every internet savy “biker” :-).
Now with the gearing numbers also out, I entered them into
my Excel spreadsheet and the numbers I saw were a bit shocking.
Primary Reduction: 3.042
Secondary Reduction: 3.000
Rear Tyre
size: 100/80×17
Ratio ->
|
2.833
|
1.875
|
1.364
|
1.143
|
0.957
|
0.84
|
RPM
|
1st Gear
|
2nd Gear
|
3rd Gear
|
4th Gear
|
5th Gear
|
6th Gear
|
1000
|
4.32
|
6.52
|
8.97
|
10.70
|
12.78
|
14.56
|
2000
|
8.63
|
13.04
|
17.93
|
21.40
|
25.56
|
29.12
|
3000
|
12.95
|
19.57
|
26.90
|
32.10
|
38.33
|
43.67
|
4000
|
17.27
|
26.09
|
35.86
|
42.79
|
51.11
|
58.23
|
5000
|
21.58
|
32.61
|
44.83
|
53.49
|
63.89
|
72.79
|
6000
|
25.90
|
39.13
|
53.79
|
64.19
|
76.67
|
87.35
|
7000
|
30.21
|
45.65
|
62.76
|
74.89
|
89.45
|
101.90
|
7500
|
32.37
|
48.91
|
67.24
|
80.24
|
95.83
|
109.18
|
8000
|
34.53
|
52.17
|
71.72
|
85.59
|
102.22
|
116.46
|
8500
|
36.69
|
55.44
|
76.20
|
90.94
|
108.61
|
123.74
|
9000
|
38.85
|
58.70
|
80.69
|
96.29
|
115.00
|
131.02
|
9500
|
41.01
|
61.96
|
85.17
|
101.64
|
121.39
|
138.30
|
10000
|
43.16
|
65.22
|
89.65
|
106.99
|
127.78
|
145.58
|
PS: The above numbers are based on the gearing of the bike.
They do not take into account the clutch slip, air drag and other such factors.
Now with the bike making max torque at 7,500rpm (15Nm), the
cruising speed can be 109km/hr in top gear. With the max power being made at
8,500rpm (17PS), a speed of 123km/hr should be easily attained. Now these are
just numbers, how quickly bike can reach there, will only be known once someone
is able to strap a data logging equipment to the bike.
Going by just the numbers, I belive the bike should be able
to meet the claims of Yamaha official that this bike will be the fastest
amongst all Indian bikes, in straight line.
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