mph vs redline - Kawasaki Vulcan Forum : Vulcan Forums
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post #1 of 64 (permalink) Old 09-26-2010, 06:33 PM Thread Starter
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mph vs redline

I bought my 900 custom about a month ago, and this is the first bike I've had that doesn't have a tach. I feel like there is a lot of room left to rev, but don't know where I'm at in the rev range. Has someone with a Tach figured out what their speed is at redline (rev limiter) in all the gears? Mostly, 1, 2 and 3 (if 3rd isn't going too fast).

Maybe speeds at:
1st - 6000 rpm and redline
2nd - 6000 rpm and redline
3rd - 6000 and redline

Has anyone done this, or be willing to do this?

Thanks
-Hayes

I grabbed a fistful of throttle and all my worries disappeared.
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post #2 of 64 (permalink) Old 09-26-2010, 07:41 PM
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Do your own work.

Gadgets Speed/rpm calculator

Transmission

1st 2.786

2nd 1.889

Gear 3rd 1.360

4th 1.107

Ratios 5th 0.963

Final Drive Reduction 2.063

Tire Diameter 24.9 Circ 78.23

Redline 7200
speedo error 10%
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post #3 of 64 (permalink) Old 09-26-2010, 08:32 PM Thread Starter
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Ok, I googled the primary reduction. Does this look right?



Thanks for the link and info MrClean.

-Hayes

I grabbed a fistful of throttle and all my worries disappeared.
|| Former President | Vulcan Riders Association | Chapter 1-30 ||
|| 2012 Kawasaki Nomad | EJK Fuel Controller | Vance & Hines Twin Slash Cut | Thunder Manufacturing BAK ||
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post #4 of 64 (permalink) Old 09-26-2010, 08:36 PM Thread Starter
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and at redline


I grabbed a fistful of throttle and all my worries disappeared.
|| Former President | Vulcan Riders Association | Chapter 1-30 ||
|| 2012 Kawasaki Nomad | EJK Fuel Controller | Vance & Hines Twin Slash Cut | Thunder Manufacturing BAK ||
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post #5 of 64 (permalink) Old 09-27-2010, 09:32 AM
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Yes, but.

I've always found that when I'm hitting cutout my speedo, which has the Scootworks pulley on it, is showing about 40 mph. Now, with the 6% correction that the pulley gives you on the speedo and the base being about 9-10% off you get accurate readings at cutout by entering -4%. At least my speedo and GPS say 40(speedo) and 38-39(gps) when my cutout is hitting. If you don't have the scoots pulley you probably need to enter -9 or 10% to get what your actual speed will be. Its all confusing I know. Do you want what the speed Actually is, looks like on your speedo, rpm it should be? Anyways it should all be straight math, but regularly I notice it doesn't look quite right if I put the numbers in the way I read the instructions, this only with the speedo correction and that's only for the factory, non-modded speedo.
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post #6 of 64 (permalink) Old 09-27-2010, 12:25 PM Thread Starter
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Quote:
Originally Posted by MrClean View Post
Yes, but.

I've always found that when I'm hitting cutout my speedo, which has the Scootworks pulley on it, is showing about 40 mph. Now, with the 6% correction that the pulley gives you on the speedo and the base being about 9-10% off you get accurate readings at cutout by entering -4%. At least my speedo and GPS say 40(speedo) and 38-39(gps) when my cutout is hitting. If you don't have the scoots pulley you probably need to enter -9 or 10% to get what your actual speed will be. Its all confusing I know. Do you want what the speed Actually is, looks like on your speedo, rpm it should be? Anyways it should all be straight math, but regularly I notice it doesn't look quite right if I put the numbers in the way I read the instructions, this only with the speedo correction and that's only for the factory, non-modded speedo.

I do not have the scoot pulley ( future mod), my main concern is that I am afraid to rev too high, but sometimes I feel like I am shifting too low. My ride to school this morning was a good one (cold, but good). I rode first gear through 40 mph(speeo). I just wanted a handle on how high the engine was revving when I was shifting. Seems like 25-30 is a reasonable shifting point from 1st to 2nd.

Thanks for all the help MrClean.

-Hayes

I grabbed a fistful of throttle and all my worries disappeared.
|| Former President | Vulcan Riders Association | Chapter 1-30 ||
|| 2012 Kawasaki Nomad | EJK Fuel Controller | Vance & Hines Twin Slash Cut | Thunder Manufacturing BAK ||
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post #7 of 64 (permalink) Old 09-27-2010, 12:37 PM
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i usually shift out of first at 25ish, out of 2nd at 40ish, out of 3rd at 55ish, etc... i have the SW pulley.

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post #8 of 64 (permalink) Old 09-27-2010, 02:08 PM
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I have the original front & rear pulley. I usually switch gears like aaron5140.
shift out of 1st 25ish
out of 2nd 40ish
out of 3rd 55ish
out of 4th 70ish
at around 90ish start wishing I had a 6th gear. I dont really need to go any faster than that so I am content. I have had it a little over 100 a few times but it seemed like my bike did not like it much.
 
post #9 of 64 (permalink) Old 09-27-2010, 05:31 PM
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I usually shift at the rev limiter.

Actually, the bike is a smaller motor made to rap out a little bit. Probably woudln't hurt you to hit the limiter at least once a week.
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post #10 of 64 (permalink) Old 09-27-2010, 05:32 PM
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At least I HOPE it doesn't hurt it.
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