I've also done a fair bit of research on this. It appears that the R6, (around 2005) has almost the same steering geometry as the NSR. Silikesguinnes will be able to add better info, as he's fitted the R6 front end to his 21.
What are the diameters of the CBR forks where the triple clamps hold them? Have you considered the Tyga RVF/NSR conversion triple clamps?
Here's various bits of info that I've cut and pasted from various forums that might help you:
A lot of people press the stem out of the NSR yokes and into the yokes they're intending to use with whatever front end they have... That is absolutely fine, IF the new yokes have an offset of 35mm...
The NSR yokes have a pretty large offset at 35mm... For instance, Harris' adjustable offset yokes only have a range of 24-34mm... The offset is the primary way that the trail is determined and even a very small change can have a large impact on increasing or decreasing the trail. The conversion I've just done with the ZX6rr forks wouldn't have been possible with their yokes. The offset was 20mm... This would have increased trail from 87mm standard to 98mm. Doesn't sound much, but it would sure slow down your sweet handling NSR.
As Andy points out, it's not quite as simple as just swapping it all over, IF you want to do it properly.
You CAN partially overcome the increased trail, by reducing your rake, (increasing rear ride height, rasing the forks trhough the top yoke), but it's a comprimise.
If you measure your offset (ooer), it is still 35mm. I don't know what the RVF offset is (perhaps fontyy can help) but the Jha yokes keep everything the same as the NSR. The RVF forks are also the same length from the top face to the centre of the wheel spindle as the NSR - 710mm.
Hi Liam,
The stock NSR has a fork offset of 35mm. The RVF400 is 35.5mm.
The RVF fork diameters are 52mm on the lower clamp and 50mm on the top clamp.
We are slowly increasing our range of triples and other products, but it's not a quick process when we only have one CNC machine and a mere 24 hours in the day!
I hope that these dimensions work for you.
Cheers,
Matt.
03/04 ZX636 uppper fork – 50mm
RGV is 50mm top and 52mm bottom.
I believe the ZX-10R front end could work just as well as anything else, the only thing I haven't determined is the fork spacing. I suspect that it may be 214mm, if it is then it could be the best Frankenviffer swap going, as it would literally bolt straight in using CBR/SP1 tripleclamps.
For reference, the R1 forks are spaced 210mm apart, which necessitates spacers to make it all work.
2007 GSXR1000 fork offset 28mm, from 30.
I put '05 R6 inverted forks in my 350 and the offset in those is 35mm, not sure if '06 is the same though. yes they are the same, 05-06 I have the complete front end as well Gus, If yours are '06 can you confirm th