I got new Dunlop valves (modern) to replace the damaged Dunlop valves for both the front and rear tires. The valve replacement was easy for the front tire. But for some reason when it comes to rear tire, the valve is just not going into the stem.
I looked for blockage in the stem (swiped the inside of the Dunlop stem with a thin wire) and found nothing. I have searched in many places for answer but found none. Can someone tell me what am I missing?