16/42 gearing too strong?

[Mr Brown]

(Professor @ Oct. 30 2006,20:24) If you pull the chain away from the sprocket at 3 o-clock does it try to move the links in the 6 – 13 o-clock position?  

6-13 o'clock?

Seriously, thanks for helping him. I'll get a pic of my sprocket tomorrow.

 

[Professor]

(Mr Brown @ Oct. 30 2006,21:03)

(Professor @ Oct. 30 2006,20:24) If you pull the chain away from the sprocket at 3 o-clock does it try to move the links in the 6 – 13 o-clock position?  

6-13 o'clock?

 

Seriously, thanks for helping him. I'll get a pic of my sprocket tomorrow.

Talk about hitting the wrong key! Ok Fixed

I should have looked at it a second time.

 

[tinbender0]

What does a new 16/42 setup cost? What rpm does that put you at highway speeds? hmmmm,,,,,second gear power wheelies?

any other advantages?

 

[Professor]

(tinbender0 @ Oct. 30 2006,21:21) What does a new 16/42 setup cost? What rpm does that put you at highway speeds?  hmmmm,,,,,second gear power wheelies?  

any other advantages?

Add about 11.5% to the rpm using stock setup. Cost is going to depend on what you buy. $65-75 for the sprockets using your existing chain.

Advantages on the street... I don't like it, many do. I use it at the track and go back to a 17-42 on the street. Do a seach, there are many opinions and threads on it.

 

[tinbender0]

thanks,,I will BTW what is the stock config? Sorry,,I've never counted the teeth on the sprockets........too hard at 100 + mph

.....dang ,,,always loose count after 1...lol

 

[Professor]

Stock is 17-40

 

[tinbender0]

thanks pro!!

 

[Professor]

Here is a cut and paste from a spreadsheet I made comparing stock gearing to other combinations. The last column is rpm to run the same MPH as the stock setup does @ 4000 rpm. Hmmm a 18-39 will correct your speedometer without a speed-o-healer!

16 38 2.375 0.9% 4037
16 39 2.438 3.6% 4144
16 40 2.500 6.2% 4250
16 41 2.563 8.9% 4356
16 42 2.625 11.6% 4462
16 43 2.688 14.2% 4569
16 44 2.750 16.9% 4675
17 38 2.235 -5.0% 3800
17 39 2.294 -2.5% 3900
17 40 2.353 0.0% 4000
17 41 2.412 2.5% 4100
17 42 2.471 5.0% 4200
17 43 2.529 7.5% 4300
17 44 2.588 10.0% 4400
18 38 2.111 -10.3% 3589
18 39 2.167 -7.9% 3683
18 40 2.222 -5.6% 3778
18 41 2.278 -3.2% 3872
18 42 2.333 -0.8% 3967
18 43 2.389 1.5% 4061
18 44 2.444 3.9% 4155
18 45 2.500 6.2% 4250
18 46 2.556 8.6% 4344

 

[SpeedGeek]

(tinbender0 @ Oct. 30 2006,19:21) What rpm does that put you at highway speeds?  hmmmm,,,,,second gear power wheelies?  

any other advantages?

4k rpm = 63 mph (speedohealer -16.8% calibrated courtesy of the local sheriff's deputy w/ his laser gun  

)

Limiter in 6th (no TRE) = 173 mph

The buzzy 4500 rpm is about 70 ish  Its turning 5 k close to 80 mph.

2nd and 3rd puls OMFG harder than stock gearing.  You don't have to downshift to pass cagers... more torque on hand in top gear roll ons.  I still get 43 mpg when cruising at 65-75.

Best "by the seat of your pants" bang for your buck!

 

[tinbender0]

I may try the 17/42 one day

 

[psycobusa]

thats why i dont use an alum to drag with.......also you probably had chain adjustment issues.......too tight or too loose possibly

 

[delboy]

Try a Super Sprox "Stealth", best of both worlds alloy centre steel outer and they a massive range, running 43 rear, no problem

 

[Professor]

(deldewey @ Nov. 01 2006,10:15) Try a Super Sprox "Stealth", best of both worlds alloy centre steel outer and they a massive range, running 43 rear, no problem  

I tried to buy one a few months back. After much work I found the US importer and they didn't have a 40 on the shelf. Very nice looking unit. I'm going to try again this winter now that I'm a bit closer to where I need to be with the gearing. I'll likely jsut get one for the street however and run alum on the strip.

 

[SLEEPERBUSA]

Stop riding all of those big fat sista's around and you won't need a new sprocket

 

[tinbender0]

How did you know???

 

[TheAtomicAss]

Now I'm sure that these alum. sprockets are hardened, tempered, or alloyed with some other more durable material, but when I was shopping for sprockets for my Ninja, I was told to avoid alum. if I wanted it to last any significant amount of time.

On a bike that peaks at 12 ft/lbs. I wouldn't use alum. ANYTHING on a Hayabusa's final drive.

 

[Mr Brown]

(TheAtomicAss @ Nov. 04 2006,08:55) Now I'm sure that these alum. sprockets are hardened, tempered, or alloyed with some other more durable material, but when I was shopping for sprockets for my Ninja, I was told to avoid alum. if I wanted it to last any significant amount of time.

On a bike that peaks at 12 ft/lbs.  I wouldn't use alum. ANYTHING on a Hayabusa's final drive.

You are perpetuating the myth. I weigh in excess of 260lbs, I launch my bike by holding the rpm's around 6k and throwing away the clutch, on the strip with a sticky tire. If my Vortex aluminum was weak, it would have broken by now. Ally is fine, hell Ryan Schnitz uses one on his Pro Stock bike.......

 

[vinnycr2]

17/42 for me with a Sidewinder billet aircraft aluminum rear.

No problems after 2,000 + miles so far.

No wheelies but plenty of hard launches coming out of a corner exiting an on ramp to redline on the highway.

 

[321CYA]

Hey HayaBOOsta

Are you running NOS yet?

 

[Cykill]

I use the 17/42 myself. Thinking about giving the 16/42 a shot, but I'll be honest just adding the 2 to the rear was a great up-grade IMHO