Hey, all-
I recently replaced my frame petcock and fuel lines with clear Tygon fuel line that I got from another GSTwinnner. The seller included the fuel line in a sale of a frame petcock which had the black fuel lines still attached. Those lines had a mesh cover on them. They look kinda like black Chinese finger traps. Didn't think much about the mesh sleeves until reading a post on here about some fuel lines not being US DOT approved for road use, protection of fuel lines and such. I've been bopping around for a few weeks now with the nekkid Tygon line working a treat so far, but I don't want to cause trouble for my moto by treating the lines improperly. I hadn't even thought about slipping the sleeves on the Tygon lines, but are they necessary? Does anyone have experience with naked fuel lines failing? What about the protective Chinese finger trap sleeves?
Its a heat and abrasion thing. I am sure someone has a story of a failed line. If the mesh is higher heat rated then it will work as an additional barrier. I have both mesh on some and the stock hose line covers on my other lines.
Hopefully others will give you their opinion/experience.
I used Tygon lines on my track bikes and never had an issue.
Tygon with low permeability is not as affected by sunlight. In any case the killer is the sun. Sleeve over it with something like the tyvek house wrap stuff and it will not be an issue.
Cool.
Buddha.