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TOPIC: Speed vs RPM
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Radar (User)
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Posts: 67
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Speed vs RPM 4 Years, 9 Months ago
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Where can I find a chart of Speed vs RPM for a stock 2006 Midnight Star?
I know the gear ratios are:
1st - 2.375
2nd - 1.579
3rd - 1.160
4th - 0.906
5th - 0.750
Stock pulley on both front and rear.
Stock 16" Wheel and Tire.
Don't have a tach yet, but maybe this data will convince me to get one. |
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'06 R* Silverado Midnight.
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Re:Speed vs RPM 4 Years, 9 Months ago
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If anyone would know, it would probably be Doc Shadow!
I have wondered about this too. We need to figure out the rear tire circumference, as well as the front to rear drive pulleys ratios as well to figure it out.
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A Fallen Man is not a failure.
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Re:Speed vs RPM 4 Years, 9 Months ago
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StarMyram wrote:
If anyone would know, it would probably be Doc Shadow!
I have wondered about this too. We need to figure out the rear tire circumference, as well as the front to rear drive pulleys ratios as well to figure it out.
Only for my bike  .... 100 Kph in second = 5000 rpm  
You hit the nail on the head .... bike + pulleys + tires = difference
Different gear = different rpm/speed (plus speedo is not accurate)
Stock front pulley on 1700 = 32 tooth
Stock rear pulley on 1700 = 70 tooth
Doc
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Radar (User)
Fresh Boarder
Posts: 67
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Re:Speed vs RPM 4 Years, 9 Months ago
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Is there someplace where we can get either radius or diameter of these pulleys?
Stock front pulley on 1700 = 32 tooth
Stock rear pulley on 1700 = 70 tooth
Maybe we could work back from there.
I know the stock Primary reduction Ratio is 1.532 and the
Secondary reductions Ratio is 2.393.
I can measure my rear wheel diameter tonight after work.
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'06 R* Silverado Midnight.
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Re:Speed vs RPM 4 Years, 6 Months ago
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Here is a chart that I made up using 07 Roadstar specs. Stock rear wheel, pully, etc. I hope this helps someone.
RPM's
MPH 1st 2nd 3rd 4th 5th 10 1182 786 578
15 1774 1179 866
20 2365 1572 1155 902
25 2956 1965 1444 1128 934
30 3547 2358 1733 1353 1120
35 4139 2752 2021 1579 1307
40 4730 3145 2310 1804 1494
45 5321 3538 2599 2030 1680
50 3931 2888 2255 1867
55 4324 3177 2481 2054
60 4717 3465 2707 2240
65 5110 3754 2932 2427
70 5503 4043 3158 2614
75 4332 3383 2801
80 4620 3609 2987
85 4909 3834 3174
90 5198 4060 3361
95 5487 4285 3547
100 4511 3734
105 4736 3921
110 4962 4108
115 5187 4294
120 5413 4481
125 4668
130 4854
135 5041
140 5228
Stan |
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Re:Speed vs RPM 4 Years, 6 Months ago
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Forget it. I will email it to anyone who asks. I can send it email, and the chart is fine. But when I post it, the numbers are scrambled.  Sorry 
Stan |
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Re:Speed vs RPM 4 Years, 6 Months ago
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Hey Stan
No need to apologize Thanks for putting in the time and effort to do it  |
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Re:Speed vs RPM 4 Years, 6 Months ago
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they make perfect sense to me............ |
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Re:Speed vs RPM 4 Years, 6 Months ago
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I figured it out ok,thanks for doing it  |
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06 Midnight Silverado
*nothing shines like a star*
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Re:Speed vs RPM 4 Years, 6 Months ago
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Let's see if this works. This is Stans chart.
.JPG) |
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Last Edit: 2007/11/20 20:50 By Musky.
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