posted August 27, 2010 10:53 PM
what rear sprocket to buy first sorry guys im sure this question is beat to death but in searching the same things kept coming up. i have an 09 zx14, flys out , full yosh pipe, no power commander, air filter removed , 87 octane fuel, lowered 1 1/4" in the front also strapped, lowered 1 1/2' in the rear, 6" over extentions, 16 front and 44 rear sprockets, shinko u-soft. im 235 suited best run so far leaving at 7500 is 1.55 60ft 9.82 @ 138 im on the limiter in 4th or just shifting to 5th. im planning on going with a bigger rear sprocket not sure if i should go with a 46, 47, or 48. i would like to be at the top of 5th gear when i go though the traps. i really dont want to have buy them all to test them out. the bike is rarely if ever street riden. i hope you guys can help me out.
posted August 28, 2010 03:45 AM
Moses we are the same size and I had also run the 16/44 before going to 16/46 which I use all of in 5th gear.
Your mph is way low, are you at high altitude? You should look into that power commander. There is a lot left in the bike.
____________
Get on the shortbus boys 'cause its time to get schooled.
2007 ZX-14
1.38 60ft
9.03 @ 149mph
8.95 @153 small shot n2o
8.68 @160mph 5lbs boost
posted August 28, 2010 05:05 AM
+1 on the Power Commander.
With a full Yoshimura exhaust and air-filter removed it will be running lean.
____________
Candy Thunder Blue 2006 ZZR1400
Stock wheelbase
Max: 205.4 mph in 1.25 miles
2012 ZZR1400 in Golden Blazed Green
Brock CT Full System. etc
Max: 203.1 in 1 mile (so far)
posted August 28, 2010 05:19 AM
I am about 215-220 suited, and I run 16/48 and it works perfect for me. Yesterday at the track it was very humid (rain clouds all around) and hot and it still ran 9.16,9.16,9.16,9.15, and 9.14 last two were at 150 mph. That's 60 ft 1.39-1.41 every pass.
The big sprocket might not make it any faster, but it sure helps with consistency. I was never that consistant on a test and tune.
____________
Best: 60ft 1.351 1/8 5.68 mph 123.98 1/4
8.89 mph 151.32
posted August 28, 2010 05:32 AM
Edited By: Shane661 on 28 Aug 2010 13:33
Moses, you need to get on the throttle, and get the clutch out. You shouldn't need to leave at 7500. You will go faster getting in the throttle and launching it at 5500. 16/44 is plenty of gear for your setup.
I have run 16/41, 16/42, 16/43, 16/44, 16/45, 17/43, and 17/45 at the dragstrip. Any gearing can be consistent, if the rider is. If you want to calculate your own gearing, go here:
When you get your bike making more power, you will already be spinning over 10k at the traps with your current gearing. Most of your ET comes at the beginning of the track, which is why you will gain more by learning to ride your current setup, and getting the engine tuned properly.
posted August 28, 2010 05:38 AM
The reason I feel the 48 rear helps with consistency is because your letting go of the clutch so much faster, your not slippig it as much as a lower gearing.
Shane's right, around 6,000 should be close to being high enough.
I went to my current gearing after running 16/43 for a while. I won't go back to 16/43 anytime soon.
____________
Best: 60ft 1.351 1/8 5.68 mph 123.98 1/4
8.89 mph 151.32
posted August 28, 2010 06:02 AM
Edited By: Shane661 on 28 Aug 2010 14:02
More gear is easier to launch, but ultimately limits the bike in my opinion, and experience. Just starting out, you might go faster, though. I did. But now even 16/43 is a little too much gear at times.
posted August 28, 2010 06:28 AM
Limits the experience of the rider?? If your bracket racing you don't want to do everything to make yourself as consistant as possible? Sorry Shane, I just disagree with the gearing thing. But then again my bike has never been on the diet yours has, so were not comparing apples to apples on the bikes.
____________
Best: 60ft 1.351 1/8 5.68 mph 123.98 1/4
8.89 mph 151.32
posted August 28, 2010 06:39 AM
Edited By: Shane661 on 28 Aug 2010 15:00
quote:Limits the experience of the rider?? If your bracket racing you don't want to do everything to make yourself as consistant as possible? Sorry Shane, I just disagree with the gearing thing. But then again my bike has never been on the diet yours has, so were not comparing apples to apples on the bikes.
Dusty, the fastest guys here do it on 16/41. You know this. Do you think you need 7 gear teeth to make up 55 lbs?
Hell, there is only about 30 lbs. difference between our bike/rider combinations (I am heavier than you) and I run 5 less teeth than you, and less wheelbase...and consistently go as quick or quicker in the 1/4 mile.
It limits the potential of the machine....in my experience...because you can't ride it the way it needs to be ridden in order to fully exploit the performance of the bike. That is why your 330' #'s don't match up to your great 60 foot #'s. Simple as that.
I know that faster guys than me have told you this as well.
posted August 28, 2010 07:18 AM
Edited By: Shane661 on 28 Aug 2010 15:20
High 3.7's on mid 1.4 60 foots (1.45-1.47). 5.77 1/8th, 125-127 mph typical. That's running 9.0s. We don't have a 330' mph timer at my track. That's on 64.5" of wheelbase, with 16/43 gearing, and 690-700 lbs. of combined weight.
My best 1/4 ET's were done on a cold day, but I am not counting those....bad riding still got me in the 8's that day.
posted August 28, 2010 07:24 AM
Moses asked what would give him all of 5th so that rules out 16/48 unless he wants all of 6th too.
____________
Get on the shortbus boys 'cause its time to get schooled.
2007 ZX-14
1.38 60ft
9.03 @ 149mph
8.95 @153 small shot n2o
8.68 @160mph 5lbs boost
quote:Moses asked what would give him all of 5th so that rules out 16/48 unless he wants all of 6th too.
Well, also keep in mind that he is only running 138 mph. That's why I think he should keep his current 16/44, get the bike tuned right, and learn to ride it better. If he can pick up 10 mph through tune and riding, his gearing will fairly be close to what he wants already.
posted August 28, 2010 07:28 AM
guys thanks for all the input but it has left me still unsure. i am not the best rider but consistent. maybe consistently bad but consistent. i am at atco raceway which is at sea level. a pro rider at my track said that pipe no filter no commander would put my a/r right on. i have let a 150lb pilot ride my bike and he only went 2 tenths better with 4 more mph at about the same 60ft i think he went 1.59. thats 85 lbs lighter than me. i do lead with my trottle hand. i have also had riders watch me launch and they say it looks right. i have about 25 passes total on the bike. but i have raced an r1 and a gsxr 750 over the passed 14 years
posted August 28, 2010 07:31 AM
Edited By: Shane661 on 28 Aug 2010 15:39
I think you should check into the tune on the bike. If a 150 lb. guy is running around 142 mph on a 14 with a full system, there is some sort of issue. Especially at Sea Level!!
posted August 28, 2010 07:43 AM
no foot shifting stock shock and spring nothing more than whats listed. i thought with the race experience that i have 9.5s would be easy. however im having the hardest time
posted August 28, 2010 07:47 AM
Edited By: Shane661 on 28 Aug 2010 16:21
quote:no foot shifting stock shock and spring nothing more than whats listed. i thought with the race experience that i have 9.5s would be easy. however im having the hardest time
I was able to run 9.59 within my first 5 or 6 clean passes. That was 63", footshifting with clutch, Mid 1.5's. on only +2 gearing! 17/43 gear and 1100 miles on the bike..
You can see I am no lightweight!
But you can hear that I got on the throttle pretty hard. 142 mph and I am the worst foot shifter in the world. In fact, I have datalogged .3 second on/off throttle transitions, even clutchess. They created airshifters for guys like me.
16/45 gearing, with airshifter. Much less initial throttle, mid 1.5 60':
16/43, lightened bike, more wheelbase, more agressive throttle than 16/45, mid 1.4 60':
All above, launching around 5500 rpm.
Like I say, check into a power commander and good map. That will give you a better baseline to work with. You have a lot more ET potential left in your current setup!
posted August 28, 2010 07:52 AM
That bike should run at least 144mph in hot weather. If you are clutch shifting those runs then all of it makes sense. I was clutchless shifting 9.40's before going to the airshifter a few years back so you can do the same.
Something is amiss.
____________
Get on the shortbus boys 'cause its time to get schooled.
2007 ZX-14
1.38 60ft
9.03 @ 149mph
8.95 @153 small shot n2o
8.68 @160mph 5lbs boost
quote:if you short shift any or all gears it will effect time and speed
wee
very true. A guy ran his zx10 for the first time last night stretched with stock gearing and he ran 127 mph in the 1/4 twice. I jumped on it and first pass went 141. He has to be short shifting it.
____________
Best: 60ft 1.351 1/8 5.68 mph 123.98 1/4
8.89 mph 151.32
posted August 28, 2010 10:01 PM
once i hit full throttle i dont let off i just bump the clutch right at the red line but not hitting it. im deffenatly not short shifting. buy clutchless shifting do you guys mean backing off the throttle a little and shifting?
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posted August 27, 2010 10:53 PM
Edited By: 
142 mph and I am the worst foot shifter in the world. In fact, I have datalogged .3 second on/off throttle transitions, even clutchess. They created airshifters for guys like me. 
