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Offline ace

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Re: perfect sprocket size?
« Reply #15 on: August 19, 2009, 01:58:15 PM »
Is there any drag in the driveline,
In the brakes? Can u push it easily
On flat ground?
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Offline Voodoochikin04

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Re: perfect sprocket size?
« Reply #16 on: August 19, 2009, 02:13:50 PM »
yea moves easily.. its not over 1000lbs..   its moves along great, just needs bigger rear sprocket, im just trying to find out if a 60 is best or 72 is best.. 

from what im finding online, masterfab, primary ratio is 1.725 for the 1993, and 1.744 for the 1998  the 1995 model was not listed but its gotta be one of those or close.
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LiveWire

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Re: perfect sprocket size?
« Reply #17 on: August 19, 2009, 04:08:55 PM »
What are the ratios for 5th and 6th gear?

60 x 5th ratio / 6th ratio would be a good starting point.

When going 65 in 5th, is that at the RPM of peak HP? If not, you could probably go a bit lower. Result of above formula X peak power RPM/ RPM it was turning at 65. Then round down in teeth.
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Offline Voodoochikin04

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Re: perfect sprocket size?
« Reply #18 on: August 19, 2009, 05:00:24 PM »
5th gear at 8K-9Krpms about 65mph..  but cant gaurentee the car speedo was spot on and so forth. 


i guess the haynes manual tells everything about the bike except the gear ratios..... looked at every page.
« Last Edit: August 19, 2009, 05:12:37 PM by Voodoochikin04 »
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Offline fastcorvairs

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Re: perfect sprocket size?
« Reply #19 on: August 19, 2009, 05:26:40 PM »
Quote from: Voodoochikin04 on August 19, 2009, 05:00:24 PM
5th gear at 8K-9Krpms about 65mph..  but cant gaurentee the car speedo was spot on and so forth. 


i guess the haynes manual tells everything about the bike except the gear ratios..... looked at every page.

I think you need to gear down.  Your getting out of your toque band in 6th.  You need to see 12000 13000 in 5th. to get back to 8000 in 6th.  that's my nickel.
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Online fabr

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Re: perfect sprocket size?
« Reply #20 on: August 19, 2009, 05:28:24 PM »
Somewhere on the net you'll find those ratios.
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Online fabr

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Re: perfect sprocket size?
« Reply #21 on: August 19, 2009, 05:30:23 PM »
Quote from: fastcorvairs on August 19, 2009, 05:26:40 PM
I think you need to gear down.  Your getting out of your toque band in 6th.  You need to see 12000 13000 in 5th. to get back to 8000 in 6th.  that's my nickel.
He gets us those ratios and we'll accomplish just that for him. Or at least a boatload closer than he is now! dd:
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loyalty to the American people."
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Offline Voodoochikin04

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Re: perfect sprocket size?
« Reply #22 on: August 19, 2009, 05:37:30 PM »
found them..  for the 1988-1997 katana 600.

Primary Reduction Radio: 1.744 (75/43)
1st: 3.083 (37/12)
2nd: 2.062 (33/16)
3rd: 1.647 (28/17)
4th: 1.400 (28/20)
5th: 1.227 (27/22))
6th: 1.095 (23/21)
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Offline Punkur67

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Re: perfect sprocket size?
« Reply #23 on: August 19, 2009, 10:28:15 PM »
On my old R1 powered car I had a 14 front and a 72 rear with 30" tires. I was still able to exceed 100mph on the gps, only did that a couple times.
 
 Just keep in mind that you will also loose front tooth contact the bigger you go in the rear. The closer the sprockets are to eachother the worse this is. Also keep in mind that one tooth in the front is multiple teeth in the rear. for example a front 14 rear 72 will give you a ratio of 5.14 where a front 13 and rear 67 will give you 5.15.
 
First thing first is to figure out what top speed you want as everyone had posted before me. Then figure out what sprockets are available and what ones will fit. My 72, if i remember correctly was about 13" in diameter. I couldnt find lower than a 15 tooth front so I had my stock hub machined out of a sprocket and machined the hub out of a 14 tooth from another bike. I then tig welded them together.
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Offline Doug Heim

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Re: perfect sprocket size?
« Reply #24 on: August 19, 2009, 10:31:26 PM »
dont know if this helps but I run a 13 front and a 60 rear with 26" tires with my RC 51.  I use a 74 pin chain and the sprockets are close. To increase tooth contact I use a high quality Idler (15 tooth).
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Offline Voodoochikin04

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Re: perfect sprocket size?
« Reply #25 on: August 20, 2009, 06:54:07 AM »
i said before that i can hit approx 65, a little faster would be nice, i was hoping that going bigger sprocket would enable me to use the 6th gear, hoping that would increase my top speed..  i can always go down to 13 on the front
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Offline Carlriddle

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Re: perfect sprocket size?
« Reply #26 on: August 20, 2009, 07:21:24 AM »
I'm running 13/55 with 25" tires and 600 ninja.  1st I can idle alond at quick walk.  Only been in 5th prob about 60,  Needed more room and more b ;D ;D lls for any more.  The 55 sprocket hangs too low below frame, but had to have it.
« Last Edit: August 20, 2009, 07:50:29 AM by Carlriddle »
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Offline Voodoochikin04

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Re: perfect sprocket size?
« Reply #27 on: August 20, 2009, 07:45:51 AM »
oh im sure someone else would think mine is plenty fast...  from the video it seems plenty good.. but personal preffrence, i want more low end, i wanna pull stumps if i need too...  lol.. and be able to use my top gear.. most of my time getting to cool places to ride is me driving to them, in the buggy so i need to have a good cruising speed...  trust me, it needs more..  so thats why im asking for help figuring out what size rear sprocket i need. :)
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Online fabr

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Re: perfect sprocket size?
« Reply #28 on: August 20, 2009, 08:52:15 AM »
Working on it now. Between customers.
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

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LiveWire

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Re: perfect sprocket size?
« Reply #29 on: August 20, 2009, 01:08:05 PM »
A 67 tooth will give you similar RPMs in 6th as to what you are getting in 5th now.
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