Join Date: May 2012
Location: Toronto, Ontario.
Tire brand can make a big difference to how easy tires mount on a 650. Pirelli Diablos are a hellishly difficult to mount on the rim, but easy to seat the bead. Michelin Pilot Sports are the reverse. The Bridgestones sit somewhere in between on both counts. Call me stubborn, but I always use three Motion Pro tire levers.
Over the years, I've tried windex, wd40, soapy water and ru-glyde. They all work as lube, but the ru-glyde leaves the least residue and no moisture inside to corrode the rim if the paint is dodgy (on my 650, it is). Technique is SO important with Burger tires. The carcasses don't have the same amount of give as motorcycle tires, so if you're not paying attention, it will take hours to finish. Getting the first side of a tire over the rim lip is generally pretty easy. Its the second side that's the hair-pulling swear-a-thon.
When guides tell you to keep the near side of the tire pushed down into the rim while you work, they mean BOTH beads (top/bottom). What tends to happen when you push the top bead down into the rim, the bottom bead slips up to the other lip, unnoticed. It's virtually impossible to stretch the stiffer scooter tire carcass enough when this happens. Motorcycle tires are more forgiving here, which is why I thought I knew what I was doing before I got the Burg.
What I do is use a ratchet strap to squeeze both beads into the rim so I have that tiny bit of leeway to complete the mounting on the opposite side. The same ratchet strap (get the type without the hooks) can be used to hold the tire around the circumference if the air escapes too quickly while you seat the beads with a compressor. Keep it tightened, but not locked and it will loosen as the tire expands. I'm not a mechanic and no expert, so take the advice with a grain of salt. Good luck!
The Motomaster-Fram-WD40-Slime experiment continues.
Last edited by Flywheel; 03-20-2017 at 03:19 PM.