New guy here, so hi. I brought home my first proper dirtbike today, and by spring it will be my first supermoto.
Bike needs at least a piston and rod, wheels, stickers (most important obviously), bigger brake disk and caliper bracket, and fixing some minor stuff. It rides great as is. Also need to install street stuff to get license plate.
This thing will see regular track time, some forest action, and street use. I'm still undecided on wheel size. The rear 17x5 is a no-brainer, but I'm tempted by a 16.5" front. I'll be riding to trackdays, meaning I definitely won't be using tire warmers. Does that mean I should forget about slicks?
Last edited by StupendousMan; 12-09-2016 at 02:55 PM.
Yeah, cast. Lots available on ebay, and pretty nice looking. Also, you can get floating 320mm rotors for the front from KTM. I'd really like a 6mm thick cast iron race rotor though, but I haven't found them yet. I have a couple 300mm ones here, that I could make the center for, but then I'd also have to machine the caliper adapter, and I'd rather not.
I now have a Brembo 16x18 master coming as well. Purte1 still has not shipped the radial caliper adapter, luckily there are others available if that doesn't work out.
Can't get 20x35 mm bearings from any of the major manufacturers, which means a bit more lathe work. I need to either make a new 15mm axle for the Sherco's WP forks, or machine the wheel to take the Sherco 20mm axle and 20x42 bearings.
I prefer the latter option, but no one I know has a lathe big enough for a wheel. So I guess I'll make a new axle. It won't be as light as the original hollow one, but at least I can build in crash bobbin mounts.
Last edited by StupendousMan; 01-09-2017 at 08:47 AM.
Reason: Rotate picture
I think it would be difficult to have similar brackets milled for much less, unless you make a bunch. Then again, I'm sure you could sell a bunch on this very site.
The thing bolted on, but my caliper interferes with the adapter and won't quite fit all the way in. No big deal, needs only the slightest touch of a file. Also the bolts that come with the adapter are silly long.
Here's a poor photo. The calipers highest (in pic) part hits the bracket. Might only happen with this model of caliper? Minor filing would do it, but since I'm having a rotor cut anyway I'll just make it slightly bigger. 330mm is a common size, so maybe 331 just to one-up folks.
Wheel-caliper-clearance is vast currently, but I'll have to machine a few mm off the rotor mounting surface, to get the wheel to sit center. Luckily I found a big enough lathe. Since the wheel will be mounted to a lathe anyway, I'll have the bearing holes enlarged to 37mm to use Sherco front axle and 6904 bearings.
Rear wheel will be changed over to 2x 6905 and 1x 6805, to also use bike's stock 25mm axle. Nice to have them written here for future reference.
Started fitting rear wheel. I think I'll order a stock RC 125 cush drive and slice it to fit. I don't need or want a cush drive, but I don't want to reinvent the wheel, literally, either.