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Author Topic: Question about stem bearings and front end swap  (Read 2253 times)

Offline esmoojee

  • Posts: 166
Re: Question about stem bearings and front end swap
« Reply #20 on: Mar 13, 2017, 20:59:47 »
I have a 2002 cbr954 front end on my bike.  I can measure the forks for you in a day or two and tell you if the measurements are the same.

Offline esmoojee

  • Posts: 166
Re: Question about stem bearings and front end swap
« Reply #21 on: Mar 15, 2017, 15:02:36 »
Measured my forks, 50mm at the top and 54mm at the lower triple clamp

Offline erock85

  • Posts: 112
Re: Question about stem bearings and front end swap
« Reply #22 on: Mar 16, 2017, 11:34:39 »
Measured my forks, 50mm at the top and 54mm at the lower triple clamp
Awesome! thank you for the information! That will work for me, and the stem is the smaller O.D. I'll just have to source a set.
Thanks again

Do you know if the 929 is the same? I know the top fork diameter on the 929 is 50mm, but I have not found the bottom measurement info
« Last Edit: Mar 16, 2017, 12:08:26 by erock85 »
1974 Honda CB360
1979 Honda CX500

Offline erock85

  • Posts: 112
Re: Question about stem bearings and front end swap
« Reply #23 on: Mar 16, 2017, 12:24:54 »
Found it http://www.gillestooling.com.au/Honda-Fork-Yolks.php

Honda CBR 1000 RR           2004 - 2005   FO-SC57-500.540   fork-diameter up=50,0 mm, low=54,0 mm

Honda CBR 1000 RR           2006 - 2007   FO-SC57-500.540   fork-diameter up=50,0 mm, low=54,0 mm

Honda CBR 900 RR / 929   2000 - 2002   FO-SC50-500.540   fork-diameter up=50,0 mm, low=54,0 mm

Honda CBR 900 RR / 954   2002 - 2004   FO-SC50-500.540   fork-diameter up=50,0 mm, low=54,0 mm

Honda CRF 250 R               2000 -           FO-CRF-530.584   fork-diameter up=53,0 mm, low=58,4 mm

Honda CRF 450 R               2002 -           FO-CRF-530.584   fork-diameter up=53,0 mm, low=58,4 mm

Honda VTR 1000 SP1        2000 - 2002   FO-SC45-500.540   fork-diameter up=50,0 mm, low=54,0 mm

Honda VTR 1000 SP2 / RC51   2002 -           FO-SC450-500.540   fork-diameter up=50,0 mm, low=54,0 mm
1974 Honda CB360
1979 Honda CX500

Offline esmoojee

  • Posts: 166
Re: Question about stem bearings and front end swap
« Reply #24 on: Mar 17, 2017, 13:00:13 »
Iím pretty sure the 929 is the same as the 954.  The only difference is that the 954 has improved adjustability.

Offline erock85

  • Posts: 112
Re: Question about stem bearings and front end swap
« Reply #25 on: Mar 20, 2017, 09:52:50 »
Iím pretty sure the 929 is the same as the 954.  The only difference is that the 954 has improved adjustability.
Is there any chance you could get me the rotor to rotor measurement on the outside? This reference pic is the RC51, but this is the measurement I am after. Thanks for your help.
1974 Honda CB360
1979 Honda CX500

Offline esmoojee

  • Posts: 166
Re: Question about stem bearings and front end swap
« Reply #26 on: Mar 20, 2017, 23:15:09 »
Yea, Iíll try to get that for you tomorrow.  The bikes are at the shop.

Offline erock85

  • Posts: 112
Re: Question about stem bearings and front end swap
« Reply #27 on: Mar 21, 2017, 14:04:05 »
I think everything changed in '08 for the 1KRR
Here's what I did to get somewhat of a measurement, I just need confirmation from someone with an '08+:
I am thinking my rotors are 136.5mm outside to outside on the '09 CBR1KRR.
I get to that number by measuring the space between the backs of the calipers when they are all bolted up, 48mm. Then the opening for the rotor to rotate through the caliper, 9.3mm. And finally the distance from the back of the caliper to the inside of the slot is 37.1mm. Now here's the math part.....(48/2) + (9.3/2) + 37.1 = 65.75mm; which is center of front end to center of caliper rotor slot. Now 65.75 + 2.5(half the rotor thickness) = 68.25mm; center of front end to outside of caliper. 68.25 * 2 = 136.5mm; outside rotor to outside rotor. Confirmation, lol?
1974 Honda CB360
1979 Honda CX500

Offline esmoojee

  • Posts: 166
Re: Question about stem bearings and front end swap
« Reply #28 on: Mar 21, 2017, 20:34:14 »
The 954 is 142mm... hope this helps.


Offline erock85

  • Posts: 112
Re: Question about stem bearings and front end swap
« Reply #29 on: Mar 23, 2017, 12:11:35 »
The 954 is 142mm... hope this helps.
Thanks, that does help a lot in case I switch the triple out. Once I get the rotors in the mail I'll be all good to finalize my design, but here's the rotor adapter to the Comstar wheel
1974 Honda CB360
1979 Honda CX500