FirestormMike wrote:I'd be very interested to know how difficult it was to mate the triumph hub to the vfr arm. Is the hub or spindle the same diameter, or was there some machining involved ?
Actually it was less difficult that I first thought. Main points:
1. I started off with a pre-VTEC VFR800 swinger, around 1999 vintage. The important thing about this arm is that it's forked at the pivot, just like a Firestorm swinger. There are some "buts" though (more below).
2. Make sure you have the VFR eccentric adjuster - the Triumph adjuster is smaller diameter and won't fit the VFR arm.
3. The GOOD news is that the bearings inside the VFR and Triumph eccentric adjusters are identical sizes, so the Triumph axle/hub assembly slides into the VFR eccentric perfectly. That's the easy bit.
4. The "buts" I mentioned above... Although the VFR arm is forked (and only requires slightly different sized spacers on the outside of the arm (ie between the arm and the rearsets) to fit nicely onto the Storm's rear end, the shape of the fork is completely different. So two effects - 1) there's not enough space for the shock in its standard location on the right, and 2) the lower shock mount on the VFR arm is in a different position to the Firestorm. So I moved the shock to the left side in order to line up with the VFR lower linkage (I made up a new upper shock mount) and re-routed the rear exhaust header to the right (see pic somewhere in this thread). So there's some work to be done there.
5. Once you have the Triumph axle/hub assembly in place you'll need to do a little machining here and there to get clearances right and everything lined up. For example, I had to skim some material off of the Triumph sprocket carrier for correct chain alignment - about 5mm if memory serves me. I also made up a one-off caliper mount for the new Brembo I fitted (although this isn't necessary - you can use the existing Triumph set up).
6. As the Triumph wheel is wider than the stock VFR wheel, there was another alignment issue - the wheel itself. For perfect alignment, I skimmed 10mm off the Triumph wheel's inner flange. Another "but"...
7. The next "but" is that, by taking the material off of the inner flange, it brings the wheel rim further over to the left and therefore potentially creates clearance issues on the rear caliper. The first Brembo caliper I bought had a vertical bleed nipple and brake line boss - I had to change that one to another Brembo with a horizontal nipple and hose boss just because of the clearance issues (see pic earlier in this thread).
8. Yo may notice on one of the pics in this thread that I've routed the brake line through the swingarm just to keep things tidy. I cut a small "pillarbox" slot in the right fork of the arm and threaded the hose through there and out one of the cast holes at the back of the arm. The eagled-eyed amongst you will notice TWO braided hoses running into the arm - the second one is to the speedo sensor I mounted on the rear of the arm (I'm running Motogadget digital instruments). I sleeved the sensor wires though a length of brake hose to protect them.
Them's the basics but give me a shout if you need any more advice. If I think of anything else I'll post.
Scubadog