I've done this in the past - spray inside the handlebar with
insulating foam from a can. Drill the opening at the end of the ***
hand warmer to a size that allows the plastic straw in snugly. Spray
in a small amount slowly. Have a couple of large screws on hand to
fill the opening as soon as you pull the straw out. Pull the straw out
slowly while covering the straw and opening with a rag all around in
case it sprays back when pulled out. Wipe quickly and put the screws
in the opening to prevent any leak out. Keep warm for a few hours as
per the directions on can. It works great.
>I have a 2001 MXZ 500 liquid cooled, electric start. The hand warmers work
>on both high and low, but even on high they don't get very hot. My other two
>sleds will about burn your hands off on high after a while but this one you
>can not even feel through the gloves. On a bare hand they are warm for sure.
>Any ideas? The switches test out fine and they are getting juice. They are
>definitely warm, no question but on a cold day you can not feel any warmth
>through your gloves. The sled runs awesome and the head light is very
>Thanks in advance for your advice!