Mushrooms are fine, providing, you ream the hole, use no oil in assembling, i tend to stretch them back out of the insertion, then apply rubber solution around the shaft and let that pull back. Inflate the tyre to full pressure, then a sharp blade to trim flush. Hundreds of miles like that. Steel belts can compromise a plug, if it eventually leaks, push it in and then replug, though I've just started using strings and they appear faster to apply.
Wouldn't attempt to use sparklet bulbs, great for soda, but useless for a good inflation. Two up I would have increased the tyre pressure to say 46-48, providing less flex on a laden bike
R80/7RT / K75RT / R1200RT / K1600 GTL - in the U.K.
Also Rans ( Honda C90 & CD175 & CX500 & ST1100, Suzuki GT250 (J) & X7, Puch Maxi), Coveted Honda CBX, Yamaha Martini XS 1300 & FS1E, Kawasaki Z900, Z1000 & Z650, Quasar, Suzuki GT750
Last edited by Mole999; 08-13-2016 at 04:12 PM.