Question about stem bearings and front end swap

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.
 
esmoojee said:
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
 
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
 
I’m pretty sure the 929 is the same as the 954. The only difference is that the 954 has improved adjustability.
 
esmoojee said:
I’m 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.
23w5gyb.jpg
 
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?
 
esmoojee said:
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
47CM69c.jpg
 
I figured I would update this post with some new things

I got the stem sorted out by making 2 adaptor rings, one for the top triple and one for the bottom. Both press fit. These adapt the old stem to the new clamps on the 09+ forks.
The old stem was then pressed into the bottom adaptor. The top clamp is not a press fit onto the stem. The bearing cap will need to be modified to run tapered roller bearings and that's all there is. The stock sized bearings will work.
 

Attachments

  • IMAG3738.jpg
    IMAG3738.jpg
    239.1 KB · Views: 477
  • IMAG3739.jpg
    IMAG3739.jpg
    215.8 KB · Views: 481
  • IMAG3740.jpg
    IMAG3740.jpg
    208.7 KB · Views: 496
  • IMAG3741.jpg
    IMAG3741.jpg
    243.1 KB · Views: 520
  • IMAG3742.jpg
    IMAG3742.jpg
    231.2 KB · Views: 525
  • IMAG3753.jpg
    IMAG3753.jpg
    296.8 KB · Views: 263
boy taht is short and close to the rad unless its just the angle

looks real close to the rad
 
cxman said:
boy taht is short and close to the rad unless its just the angle

looks real close to the rad
I didn't realize that in the picture, but it is definitely the angle. There's gobs of room. I looked through the pics and I don't have another that really shows it, but all is good. The setup is really good.


This is a little better angle, but there's even more room than what this shows:
 

Attachments

  • IMAG3749.jpg
    IMAG3749.jpg
    277.8 KB · Views: 251
looks better make sure the motor is not pointing to far downhill

it will throw the drive shaft angle off
 
cxman said:
looks better make sure the motor is not pointing to far downhill

it will throw the drive shaft angle off
We also strapped a ratchet strap for full compression of the front suspension on it the other night and there is no interference. Thanks for the insight btw. It can get overwhelming the stuff that may be overlooked. I appreciate it.
Ahh good point on the drive shaft, thank you. Once I set the geometry for the rear shocks with the shaft in, we'll be sure to check that.
 
Back
Top Bottom