Gearing, speed, and the like - Page 3 - Yamaha Raptor Forum
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post #21 of 147 (permalink) Old 05-11-2007, 02:35 AM
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Re: Gearing, speed, and the like

Quote:
Originally Posted by stumper
My 05 with stock gearing , 22 inch rears, fmf slip on was clocked at 81 by the south dakota hiway patrol.This was after a 5 mile WFO run .I have GPS'd it at 78mph. Funny thing is When it still had the stock tires on it, I gps'd it at 77 So I am guessing it is just maxed out on power with the taller tires and Im not on the limiter?
You are probably not on the rev limiter, or near it. If you want more top speed, run 15t front and 39 rear. I don't have much use for top speed where i ride so i run stock gearing or a 12/40, depending on my plans that day.

For those of you worried about throwing a rod - the OEM aren't prone to defects, but if you are always on your rev limiter and are constantly at the redline, you run a greater risk of throwing a rod than someone who knows when to shift. You shouldn't be on the rev limiter. Period, it's time to shift or let off the throttle.

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post #22 of 147 (permalink) Old 05-11-2007, 09:54 PM
 
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Re: Gearing, speed, and the like

Has anybody seen a chart for what gearing to be used for different types of riding? Which is best for hills, or trails, or track etc.

I understand this is subjective to a lot of variables, but i am just curious if any such list exists.


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post #23 of 147 (permalink) Old 09-07-2007, 12:00 AM
 
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Re: Gearing, speed, and the like

Reawakening a sleeping Giant...............

But is there a Link to find out a YfZ's Gearing?

I Am Curious but my buddys just built a track and they are claiming a 4th Gear Tapped jump (all on YFZ's) And I Disagree i think i would miss the landing if i hit the Jump 4th gear tapped
So In other words i am wondering who has taller gears
A Calculator like in the original Post....
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post #24 of 147 (permalink) Old 09-13-2007, 10:53 PM
 
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Re: Gearing, speed, and the like

so if i put a 15tooth on front and 39 on rear i can do 91 mph on my stock bike? thats what the calculator says anyways?
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post #25 of 147 (permalink) Old 09-14-2007, 10:22 PM
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Re: Gearing, speed, and the like

Mathematically yes, but you have to have the power to pull that gearing. That's where the gearing calculator falls short. If your bike has the power to hit redline in 5th gear, you can go that fast, more likely, you will just be unhappy at how slowly your bike accelerates.

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post #26 of 147 (permalink) Old 09-15-2007, 12:14 AM
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Re: Gearing, speed, and the like

Just as a side note gearing can also be changed with tire size also. Since I ride both open desert and dunes I am going to stay stock gearing. Paddles are stock size and am going with a 22" rear tire.

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post #27 of 147 (permalink) Old 10-06-2007, 10:37 AM
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Re: Gearing, speed, and the like

I switched to 12/42 with 22" haulers and still had a slight bog in 5th on flat ground. The over rev box was only helpful climbing out of sucker holes.

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post #28 of 147 (permalink) Old 11-09-2007, 08:01 PM
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Re: Gearing, speed, and the like

Here is something to think about. The Raptor stock motor with the stock cam will roll over on the power at about 6250rpm. When you rev past that you are not making power, only over revving the motor. If you put in a stage I hot cam the peak hp will roll over at around 7100rpm. The hot cam stage II rolls over around 8100rpm. If you are in 5th gear and stock gearing on a stock motor you will not be able to come close to the rev limiter set in the cdi @ 9200rpm. You will start to float valves and the motor will sound like you are on the rev limiter but you are not. A stock motor will not pull to the rev limiter in 5th gear. If you go to 14/40 gearing on a stock motor you will loose top end speed because the stock motor will not put the taller gearing, what I am saying is with stock size tires too. In order to hit higher top end speeds of any significance the motor with need to be built. Here is a speed chart site that you can enter tire size, gearing and year of the Raptor which has the primary gear ratio to get calculated speeds. This chart does not take in consideration wind resistance or clutch slippage. The years go from 01 and the 02 and up to 05 even though 05 is not in the list because it is an old site. http://www.ljsoftware.com/Videos/Gea...alculator.html
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post #29 of 147 (permalink) Old 01-14-2008, 10:46 AM
 
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Re: Gearing, speed, and the like

I have a 02 raptor with a 11:1 high compression piston, stage 2 hot cams, k&n air filter and a dg stage 3 exhaust. i mostly go woods riding/trail riding and i ride on the road a lot. Any suggestion on what gearing i should be running?
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post #30 of 147 (permalink) Old 01-14-2008, 10:51 AM
 
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Re: Gearing, speed, and the like

14-40
or even 15-40

hell even try 14-38

Lookin for more Speed that is the direction i would go
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