I believe a lot of supermoto riders use these and have seen some pics with these fitted in the pictures section, they are ideal for trackdays so thought I would spread the word.
Cost £10, items needed:
- 4 jubilee clips
- 2m length of hose, (only had blue plasticy caravan hose but should work fine).
Cut hose to fit as per pic with standly knife and thread circlip:

Stick em on bike:

Hope fully I wont have to try them out but better to have em and not need em than need em and not have em