New Ural pulls to right, tried everything, now what?

[pbrowne]

I'd like to ride the bike back to the dealer, but it's a handful with pulling to the right. I'm out of things to check. Can't find a trailer wide enough and may have to schedule a roll-back if I can't figure out something.

Here's what I've tried:

1. Checked sidecar driveshaft. U-joints were 90 deg. out of phase. Corrected this. Still no mitigation of pulling to right.

2. Tried many alignment changes -- up to 1 1/2" toe-in and 3 deg. lean-out. Settled on 1 deg lean-out and 5/8" toe-in. None of these changes had any effect on the pull to the right.

3. Found a problem with the sidecar brake dragging. Reservoir was overfilled, and I removed some fluid. Master cylinder was not retracting (broken spring?) an bled fluid and pushed pads off the sidecar rotor. Disconnected linkage.

[rivers]

Low air pressure in sidecar tire???

[pbrowne]

f-38, r-40, s/c-35

[xpatriot]

If I had those issues, the last place I'd take is back to the dealer who obviously couldn't set the bike up correctly.

[Kaliram]

Brake linkage rod at the master cylinder must have 1mm of free play, or else the brake pressure won’t be relieved when the brakes are released!

[Mr Wazzock]

f-38, r-40, s/c-35

IMO too high, F-28, R-38 - 40, S/C-28 (I like 26 if no passenger)

[Mr Wazzock]

PS: to be sure you could try taking the sidecar caliper completely off to eliminate it entirely.

[Desantnik-VDV]

Are your front and rear wheels in straight line alignment?
Is your engine synced?

[pbrowne]

No. The front of the rear wheel points 3/16" to the right measured against a straightedge along the front and rear tires.

[pbrowne]

There seems to no way to correct the rear wheel misalignment. I think that this misalignment causes the bike to pull to the right.

[Kaliram]

No, the pusher wheel slightly out of line doesn’t cause the pull to the right. Many bikes made have this, including my 2016 GU. Many folks adjust the toe-in with the aligning bar snug against just the rear wheel, rather than against both front and rear wheel. And the toe-in that is needed can be a lot more than 1/2”. I’ve seen ones with 1 1/2”! Adjust it to what works.

And make sure that rod that activates the brake master cylinder has 1-2 mm of play in it, or else the brake fluid won’t be released back into the brake reservoir and the brakes will just lock up. (I’ve had it happen!)

[Kaliram]

Note: if you set the toe-in at 5/8” measured with the rod against both front and rear wheels, your actual toe-in, measuring with the rod against the Inside of the rear wheel and dangling a good half inch off the front wheel, will be minus 1/8” !!!

[treeman1942]

My 2019 GU has always pulled slightly to the right. However, yesterday, I raised the sidecar tire pressure from 32 to 36 and it seemed to drive much straighter. Also, I now have 1100 miles on the rig and it drives much straighter and runs smoother than when new.

[S 854]

From waaaay out in left field: You don’t by any chance have 2WD engaged?

[treeman1942]

A couple of weeks ago, I moved the 2 WD lever while greasing my GU, then forgot to disengage it. Wow, what a bad ride for about 3 miles before realizing what was wrong!