RPM to SPEED Ratio
#1
02-20-2011, 12:30 PM
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RPM to SPEED Ratio
Hey guys/gals....... this might be a stupid question but i need to ask it regardless..... I have a 2010 Fatboy Lo, with no tachometer, just wondering what my RPM to SPEED ratio's are?? I am not an idiot and have had a few bikes in my days, and I do know how to ride .... so saying that,,,,,if someone could ballpark the RPM at a giving speed in a givin gear would be great..... EG 1st at 25km, 2nd at 40km, 3rd at 60km, 4th at 80km 5th at 100km and 6th at 120km..... or even better redline in each gear? 1st will redline at 50km? 6th will probably redline line at 200km lol...... Thanks and Cheers to all......... Happy Riding! 
#2
02-20-2011, 05:43 PM
These kms you speak of sound strange, but I saw a chart on this sight somewhere this week with mphs to rpms. I've had too many post ride adult beverages to look it up, but it is here. I suggested once to a dealer they temp install a tach for the break in with an option to buy after the first service. Seemed like a good idea to me, but he looked at me like I was from Mars.
#3
02-20-2011, 05:56 PM
#4
02-20-2011, 05:58 PM
Road Master
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Hey guys/gals....... this might be a stupid question but i need to ask it regardless..... I have a 2010 Fatboy Lo, with no tachometer, just wondering what my RPM to SPEED ratio's are?? I am not an idiot and have had a few bikes in my days, and I do know how to ride .... so saying that,,,,,if someone could ballpark the RPM at a giving speed in a givin gear would be great..... EG 1st at 25km, 2nd at 40km, 3rd at 60km, 4th at 80km 5th at 100km and 6th at 120km..... or even better redline in each gear? 1st will redline at 50km? 6th will probably redline line at 200km lol...... Thanks and Cheers to all......... Happy Riding!
Last edited by TNB; 02-20-2011 at 06:01 PM.
#5
02-20-2011, 06:06 PM
Road Captain
Not to go off topic but here's something interesting with regards to gear selection and mph. I bought my bike about two moths ago. Grew up riding dirts and street enduros but this is my first adult HD. Was reading the dealer manual the other night and ran across the recommended up shift and down shift gear selection and mph. Here's what it said. BTW, my '04 WG is 5-speed.
Up Shift:
1st to 2nd - 15 mph
2nd to 3rd - 25 mph
3rd to 4th - 35 mph
4th to 5th - 45 mph
Down Shift:
5th to 4th - 40 mph
4th to 3rd - 30 mph
3rd to 2nd - 20 mph
2nd to 1st - 10 mph
While the recommended mph to down shift seems okay, the up shift mph for 1st to 2nd, 2nd to 3rd seems way too low. When I ride it's more like 20 mph for 1st to 2nd and 30 mph for 2nd to 3rd. Probably splitting hairs I guess. Maybe they do that for break in or something.
Up Shift:
1st to 2nd - 15 mph
2nd to 3rd - 25 mph
3rd to 4th - 35 mph
4th to 5th - 45 mph
Down Shift:
5th to 4th - 40 mph
4th to 3rd - 30 mph
3rd to 2nd - 20 mph
2nd to 1st - 10 mph
While the recommended mph to down shift seems okay, the up shift mph for 1st to 2nd, 2nd to 3rd seems way too low. When I ride it's more like 20 mph for 1st to 2nd and 30 mph for 2nd to 3rd. Probably splitting hairs I guess. Maybe they do that for break in or something.
Add 10 mph for 6th gear selection. This will keep your bike running under 3000 rpms for the break-in. As far as redline....unless your racing the bike (in which case you should probably have a tach)....you should not need these values. Get into a habit of shifting around these numbers and you will be just fine.
And as a general rule of thumb:
If the bike sounds like its about to send your *** to Jupiter....SHIFT!!!
And on another note.....I don't do standard to metric conversions. So your on your own there. Or check your owners manual. It should have it all there for you.
#6
02-20-2011, 06:48 PM
Seasoned HDF Member
Looks like a way to figure it out (in MPH, anyway) http://www.bikerenews.com/Stories_Ar...Calculator.htm
#7
02-20-2011, 06:57 PM
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#8
02-20-2011, 07:09 PM
Road Captain
For me, I don't hit 6th gear until I'm running around 70mph. Most roads around my house are at 55 mph, where I run either 4th or 5th....depending on the road conditions and traffic.
#9
02-20-2011, 07:16 PM
#10
02-20-2011, 07:23 PM
http://www.nightrider.com/biketech/calc_speed_rpm.htm
Just type in Ur gear ratios, rpm limits U want, tire size and them print it out....
Ur ratios are in Ur manual or just look Ur bike up on the net doing a review and it'll say what they are....
Just type in Ur gear ratios, rpm limits U want, tire size and them print it out....
Ur ratios are in Ur manual or just look Ur bike up on the net doing a review and it'll say what they are....