'90 NC30/'07 CBR600RR USD Swap

[JeffersonNC30]

I know the USD thing has been beaten to death numerous times so I apologize for bringing it up once again, but I searched the wealth of knowledge here and couldn't quite find the answer.

I have a 1990 NC30 that I'm looking to do a USD conversion on. Living across the pond (Canada) from most of you, the RVF forks etc are next to impossible to find here. I would like to keep everything in the Honda family though, so I was thinking '07 CBR600RR front end (plus radial brakes would be nice).

I know a few of you have done it, and it appears it's very straight forward on a NC29, but I'm not sure about a NC30. Do NC29 and NC30 run the same front end? What is the stock offset for a NC30? I thought it was 35mm, and I know the CBR is 35mm. I remember reading somewhere that the length of the CBR forks is reasonably close to the NC30 as well, so I don't anticipate too many problems in the steering geometry. I would like to get it done keeping the CBR triple trees, as my bank account doesn't really like the idea of the $800 G-Force triples right now. I anticipate needing a custom steering stem machined which is fine, revalving, as well as running a CBR front wheel, but is there anything else I should be aware of? Any clearance issues etc I should be worried about?

Thanks.

[CMSMJ1]

Howdo...

You need to get in touch with venomken or venom51 as he is some times.

He has the most trick racebike with CBR USD forks...

PM him..he is a top guy.

[viper_biker]

If you do stumble across some RVF forks you'll need this spacer and bearings,



I had this fitted to my bike for literally no time at all as I broke the bike after I bought my CBR to fund trick bits for it. Bike was like this,

[viper_biker]

Actually, if you are interested, I have some '06/07 CBR1000RR forks for sale if it's any use to you.

[g-force performance]

I make Tripleclamps to convert the CBR600RR forks to the NC-30. I made the set for Venom that was referred to here.

Mike Norman
G-Force Engine Development
www.mngforce.com
mngforce(at)speakeasy(dot)net

[venom51]

And they work perfectly. It has turned out to be one of the most confidence inspiring front ends I have ever ridden.

[JeffersonNC30]

Well I'd love a set of your G-Force Triples, but right now the bank account says otherwise. Are your triples the same dimensions as stock or have you made some tweaks? I'm a little concerned that the CBR forks might be too wide (with stock triples) causing a clearance issue or two, but I haven't been able to find the dimensions for the forks tubes center to center anywhere online.

[g-force performance]

Well I'd love a set of your G-Force Triples, but right now the bank account says otherwise. Are your triples the same dimensions as stock or have you made some tweaks? I'm a little concerned that the CBR forks might be too wide (with stock triples) causing a clearance issue or two, but I haven't been able to find the dimensions for the forks tubes center to center anywhere online.

Jefferson:

I can do either stock VFR/RVF width or stock CBR600RR width. Venom51 and Lohmeyer run the CBR width and have not had any complaints. I believe this is 104mm (from memory measured over 2 years ago) from center of fork to center of fork.

Mike Norman

[g-force performance]

BTW: Here is a link to the Yokes thread if you haven't already seen it.

viewtopic.php?f=22&t=3528

Mike Norman

[ANDYC8888]

Hi Mike,
Are these gems still available? if so at what price and what timescale? specifically for CBR600RR 07 forks to an NC35.

Andy