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Guest
Guest
Sweet!!! What kind (model) of handlebar is that? 
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jwhelan65
Guest
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Colorado85gs550
Guest
C
Colorado85gs550
Guest
I'm going from 100/90-16 to a 110/70-17.....
how do I figure out total difference......is there a calculator/equation to use?
how do I figure out total difference......is there a calculator/equation to use?
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Billy Ricks
Guest
Yes, the original tire was a 16 and I went to a 17. Measure the circumference of both tires and see what the ratio is. Bike speedos are usually off a little on the high side so the actual difference may not be as great as what the speedo is registering. Best thing is to have someone is a car hit a designated speed then signal you when they hit that speed and see where you're at.
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Colorado85gs550
Guest
this is what I found at http://www.discounttire.com/dtcs/infoTireMath.dos
Totals are in inches
Tire 1= 100/90-16 Tire 2= 110/70-17
Sidewall height: Tire1=3.54 Tire2=3.03 Difference= -0.51
Section width: Tire1=3.94 Tire2=4.33 Difference= 0.39
Overall Diameter: Tire1=23.09 Tire2=23.06 Difference= -0.03
Circumference: Tire1=72.53 Tire2=72.45 Difference= -0.08
Revs per mile: Tire1=873.58 Tire2=874.48 Difference= 0.9
If your speedometer reads 65mph then you will actually be going 64.93mph with a difference of -0.07mph
Totals are in inches
Tire 1= 100/90-16 Tire 2= 110/70-17
Sidewall height: Tire1=3.54 Tire2=3.03 Difference= -0.51
Section width: Tire1=3.94 Tire2=4.33 Difference= 0.39
Overall Diameter: Tire1=23.09 Tire2=23.06 Difference= -0.03
Circumference: Tire1=72.53 Tire2=72.45 Difference= -0.08
Revs per mile: Tire1=873.58 Tire2=874.48 Difference= 0.9
If your speedometer reads 65mph then you will actually be going 64.93mph with a difference of -0.07mph
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Colorado85gs550
Guest
close enough for me
sorry about stealing the thread.....
sorry about stealing the thread.....
I have not confirmed this, but Katman told me that all the Suzuki speedos readout the with the same sensitivity. In other words RPM/MPH is the same (cable speed to needle deflection) so the variation in wheel size is adjusted in the speedo drive unit that is on the axle. As long as you use the one that goes with the wheel you are golden 
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jwhelan65
Guest
I have not confirmed this, but Katman told me that all the Suzuki speedos readout the with the same sensitivity. In other words RPM/MPH is the same (cable speed to needle deflection) so the variation in wheel size is adjusted in the speedo drive unit that is on the axle. As long as you use the one that goes with the wheel you are golden
Good info Jim, so a front bandit wheel needs a bandit cable basically?
G
Guest
Guest
Thank you!
Joe,
Bandit wheel would need a Bandit speedo drive (under that theory). I don't disbeleive Katman on this just dont know how widely it applies.
If it is a 17" wheel, the 2nd gen 17" Gixxer wheels should have the same speedo drive gear ratio, but not sure they work with bandit wheels.
Anyway that is what he told me, I can't confirm any of that yet but we have spoken on the phone specifically about this sort of confusion and the fact that there is no reason to "recalibrate" a speedo if you use the right axle mounted speedo drive.
Jim
Bandit wheel would need a Bandit speedo drive (under that theory). I don't disbeleive Katman on this just dont know how widely it applies.
If it is a 17" wheel, the 2nd gen 17" Gixxer wheels should have the same speedo drive gear ratio, but not sure they work with bandit wheels.
Anyway that is what he told me, I can't confirm any of that yet but we have spoken on the phone specifically about this sort of confusion and the fact that there is no reason to "recalibrate" a speedo if you use the right axle mounted speedo drive.
Jim
G
Guest
Guest
Just my .02, I have a complete 94 GSXR1100 front end including speedo drive and 17" wheel. My stock 83 GS1100 speedometer reads 10% faster than I am actually going. The cable itself is compatible with both the speedometer and the drive unit at the wheel.
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jwhelan65
Guest
Have some spacing to address but a brief mock up of the rear sets. The brace on the ZX12R sets is there (I think ) to allow for the spring operation of the master cylinder. Some simple spacing will allow it to pass behind the plate and mount up perfectly.
G
Guest
Guest
Joe, the return spring does go behind the mounting plate. You will need a spacer washer that's about 1/4 to 3/8 inch thick for that rear upper bolt. We have Tru-Value hardware stores here in New England. Mine carries a display with an assortment of chrome fasteners. They had the perfect chrome washer/spacer for the application in their display. Don't really need chrome cause its hidden but the size was right.
Your going to need two spacers for your swingarm pivot bolt also. I used a brass hex nut from the plumbing department on both sides.
Your getting there, now if you would just quit buying other distractions.
Your going to need two spacers for your swingarm pivot bolt also. I used a brass hex nut from the plumbing department on both sides.
Your getting there, now if you would just quit buying other distractions.
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jwhelan65
Guest
Isleo,
Yeah the spacing is an easy solution, as far as the swingarm bolt, I ordered a new one for an 83 Katana from Bike Bandit. It fits perfectly with one small washer because the Kat rear foot peg mounts are set back and attached directly to the frame so the bolt is shorter and fits flush, its not snug in the picture.
I know I know...I just couldn't stand it anymore I needed my ride fix!
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saffa
Guest
with regards to the swing arm pivot bolt ...you could also push it all the way in with a washer in place ...measure the bolt side ...thread it further along the shaft and then trim it off shorter allowing for a washer and bolt on that side...seemrd to do the trick on the one im busy on .
G
Guest
Guest
G
Guest
Guest
with regards to the swing arm pivot bolt ...you could also push it all the way in with a washer in place ...measure the bolt side ...thread it further along the shaft and then trim it off shorter allowing for a washer and bolt on that side...seemrd to do the trick on the one im busy on .
Saffa, I've thought of that too. One of these days I follow your lead. Lately its been a case of "Ride more, worry less"
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saffa
Guest
gotta be the way forward
