I have a gearing ?

[nxvette01]

Hey fellas. My bike is stock with the regular bolt ons. I have already went -1 on the front sprocket. My question is if I went up just 1 or 2 teeth on the rear sprocket would it make worth doing? Also would going up to a 43 tooth be to much gearing for the 1/4 mile?

 

[Professor]

What do you weigh?

 

[nxvette01]

about 220 230 ish

 

[Professor]

16/43 will put you at the top of 4th gear in the 1/4. I run a 16/42 and I am about your weight, but have a full exhuast and modded air box . The 43 took mine just out of the peak power range before I got to the lights. You should be good with either. I'm guessing you will be running about 136-138mph in the 1/4.

Here is a ratio chart and the % of change from stock. Going to a 42 will make about the same amount of change again as you did with the 16 front.

16/38 2.375 0.9%
16/39 2.438 3.6%
16/40 2.500 6.2%
16/41 2.563 8.9%
16/42 2.625 11.6%
16/43 2.688 14.2%
16/44 2.750 16.9%
16/45 2.813 19.5%
16/46 2.875 22.2%
17/38 2.235 -5.0%
17/39 2.294 -2.5%
17/40 2.353 0.0%
17/41 2.412 2.5%
17/42 2.471 5.0%
17/43 2.529 7.5%
17/44 2.588 10.0%
17/45 2.647 12.5%
17/46 2.706 15.0%

 

[nxvette01]

I have a full pipe, small air box mod, PCIII and have been tuned. I am also about 5 inches over with a shinko. Thanks for the quick reply and usefull info.

 

[MET]

I would not change your gearing if you are wanting all around use. Go for it if you increase your hp later.

 

[Professor]

(nxvette01 @ Aug. 24 2007,08:00) I have a full pipe, small air box mod, PCIII and have been tuned. I am also about 5 inches over with a shinko. Thanks for the quick reply and usefull info.

I thing you will ba happier with a 42 then.

Where do you race? You might consider coming to the PMRA in Oklahoma Saturday.

 

[nxvette01]

(Professor @ Aug. 24 2007,08:08)

(nxvette01 @ Aug. 24 2007,08:00) I have a full pipe, small air box mod, PCIII and have been tuned. I am also about 5 inches over with a shinko. Thanks for the quick reply and usefull info.

I thing you will ba happier with a 42 then.  

Where do you race? You might consider coming to the PMRA in Oklahoma Saturday.

We have a few 1000' tracks one in Prescott and one in Centerville. The only 1/4 mile it has seen is the kind your not suppose to do.