There is soooooo much info on here relating to fork swaps and I have read most, but not all. I'm looking for confirmation that a 2004 RC51 top bridge will work with a CBR929 lower triple and steering stem. I know the offsets and fork tube sizes are right, it is the steering stem mounting through the upper bridge that concerns me.
I'm building a 5th gen VFR track bike and the 929 steering stem and lower triple came today and there is a lot of room where the stem extends through RC51 upper triple. I have to order all the hardware (bearings, nuts, seals, etc.) none of that came with the used parts. I don't want to order more parts and find out it won't work and I have to back track.
I'm appealing to the collective wisdom of the VFRD Borg to help me answer this before I move forward. Please let me know if you have insight or answer to this question.
Rc51 and 929 uppers and lowers will bolt together.
I have rc51 lower and 929 upper. If those two did not fit together, then it wouldn't work the other way either.
There is a lot of room because your dust seals, bearings, and top nuts are not installed. Once they are, your length will be OK
Thank you Sir! This place is GREAT! You can always count on the good folks at VFRD for an answer...
... so, if I purchase all the OEM 929 steering stem hardware and the correct "All Balls" conversion bearings I should be set, correct? Or should I buy the RC51 top nut to match the upper bridge?
It'll be less confusing if you order the CBR parts. The RC had two different stem sizes over the course of production. The CBR parts will work equally well.
And I'll add a +1 on the offset, spacing, and fork diameter of the two bikes being a match.
Rush2112I'm building a 5th gen VFR track bike and the 929 steering stem and lower triple came today and there is a lot of room where the stem extends through RC51 upper triple. I have to order all the hardware (bearings, nuts, seals, etc.) none of that came with the used parts. I don't want to order more parts and find out it won't work and I have to back track.
The text that I have put in bold - and the "2004 RC51" bit - suggests that you have a VTR SP2 upper triple clamp. The SP2 stem is far heavier/thicker than the SP1 stem (which is more or less identical in dimensions to the CBR929/CBR954 stem) and you will either need to machine up a bush to locate the stem in the top triple, or sell that top triple and get one from either an SP1 VTR, or from a CBR929/954.
Thank you, Thank you, Thank you... that was my fear. I screwed up and got the wrong version.
Like I said before... This place is GREAT! You can always count on the good folks at VFRD for an answer...
OK, a 929/954 or RC51 SP1 top bridge will work. Would an '04 - '07 CBR1000 upper triple work with the 929 steering stem? They have the same width and offset and use the same upper & lower bearing on the All Balls conversion chart, but I don't know about the stem mounting hole diameter.
It should work... the only thing is that you will have the holes in the CBR1000RR top triple that are for bolting the electronic steering damper on.
The steering dampener is a plus in my eyes... do you know what the electrical inputs are for the dampener and is there the potential for wiring into a 5th gen ECU?
Never mind... I just looked at one and it looks like it mounts to the frame, gas tank, upper triple, and anything else in the neighborhood
Ok, things are looking up... I just picked up a 929 upper triple on sale for $45 USD shipped.
Anyone need a RC51 SP2 upper triple? Nice shape, at my cost... look for it in an upcoming classified
![[image: triples.jpg]](http://i119.photobucket.com/albums/o124/capnspif/RC51_forks/triples.jpg){kind=link}