Join Date: Jul 2017
Location: Drumbo, Ontario, Canada
If the valve stem cap is metal, try this:
Rotate the wheel so the stem is horizontal or pointing down, and still accessible. Then heat the end of the cap with a torch (jet) lighter just enough that you can melt a birthday candle around the threads of the stem using just the heat in the parts. If the parts are not hot enough to melt the candle, apply a bit more heat, but don’t over do it!
Once the wax has been melted into the parts, walk away. Grab a beverage, go to the bathroom, distract yourself for a bit to allow the parts to cool. Once the parts have cooled to ambient temp, attempt to disassemble. If done correctly, the wax should have wicked through the corrosion and then solidified, breaking the bond between the parts, and act as a lubricant.
You may want to replace the valve stem core, or at the least check the tire pressure before each ride to confirm there are no leaks.
2011 V650 in Black, well accessorized.