front torque arm UK?

[Deleted member 4366]

Yes that's the pic I was thinking of d8veh, my problem will be that both my caliper & fork mounts are post mount where yours is an IS caliper, having to use an adapter gave a convenient mounting point. Seems like all you can buy now are post mount brakes that come with an adapter to fit IS forks which makes it a bit more tricky. Comparing my fork to yours the axle sits below the line of the fork lowers where mine is tucked up in line (right pain) reducing clearances.....looks like I didn't buy the best fork for converting but it's very difficult to see the issues unless you're working on it.

@ John , yes that's a good idea I hadn't thought of, probably get some of those & another adapter to see what I can rig up.
View attachment 4847

This pic gives a better idea of the issue.

Here's how I'd do it:
Get or cut a piece of steel (pref. stainless) plate about 2mm thick to a size of about 80mm x 10mm;
drill a 6mm hole in one end;
Twist it through 90 degrees as tight as you can about 15mm from the hole end;
Mount it on the bottom post so that the main length hangs downwards (up if the bike's upside-down);
Fix the main part of the torque arm onto the axle and tighten the wheeel-nut;
Bend the piece of steel down until it covers the hole in the torque arm;
Mark and drill it the same size as the torque arm;
Fix it with a small nut and screw;
Trim the end with a dremmel or whatever.

Iit will then act as a tie bar. It's in tension so doesn't need to be too thick. It's imprtant to get the tension as high as possible, so push the torque arm back while you tighten the nut.

The photo seems to show it OK, but just in case: Make sure that the first washer fits in the dimple without riding up the side, otherwise the drop-out will pop off when you tighten the nut.

 

[Deleted member 4366]

I just noticed your disc screws, which look like the original ones from the bike - normally 12mm. You don't want longer than 8mm for a Bafang because there's a danger of jamming the motor/clutch.

 

[Cyclezee]

Here is an example of our torque plate set with 35 mm 'P' clip on our eZee powered BMC demo bike.
Hmm, just noticed an error. The chepo dome headed bolt on the 'P' clip is starting to rust, it didn't come with the set and should have been one of the stainless bolts as fitted to the lower part

 

[benjy_a]

It's better (if possible) to have the torque arm going to the rear (if fitted to the nearside of the bike). This will then tend to pull the axle tighter into the forks if there is any movement. If you have the arm going forward and there is movement, the torque will pull the axle out of the forks.

 

[alemanyorks]

I just noticed your disc screws, which look like the original ones from the bike - normally 12mm. You don't want longer than 8mm for a Bafang because there's a danger of jamming the motor/clutch.

Yes thanks for that d8veh, those bolts do foul the internals, started feeling the first one bind when I did it up so didn't tighten any further just left loose for now. I've ordered some 8mm thread TI ones(shortest I could find) so that should sort that. There was a spacer fitted but had to dispense with that, the disc was just too close to the post mounts to the point of rubbing them. Also now discovered I need to fit a 203 disc as the caliper design just clips the spokes .....so quite a few bits to sort before it's back running.
THX for your suggestion on the arm mounting may yet have to do something like that, still got a few options I need to investigate further, will keep you posted.

@John
Thx for the pic of the clip setup.

 

[Deleted member 4366]

If you had the spacer, there must have been 6 correct 8mm screws holding it on. What happened to them?

 

[alemanyorks]

Still have them but the black screws that came fitted with the spacer are 10mm threaded portion & bind when fitted without it.

 

[Deleted member 4366]

Still have them but the black screws that came fitted with the spacer are 10mm threaded portion & bind when fitted without it.

If they're the ones that came with the motor, they should be OK with the disc but without the spacer because the spacer is the same thickness as the disc and is only required if you don't fit a disc.