Boxerworks.com

gspd wrote: ↑Sat Apr 24, 2021 6:07 pm You need 7mm I.D. (metric) fuel hose.
It comes in cloth covered type (pre 1985-ish?) or plain rubber type.
I like the plain rubber type, seems to age better cosmetically (doesn't turn grey and get frayed ends)
Both are available from BMW (by the meter) or most places that fix old VW's and such.

gspd wrote: ↑Sat Apr 24, 2021 6:07 pm You need 7mm I.D. (metric) fuel hose.

Rob wrote: ↑Sat Apr 24, 2021 10:35 pm
you will see a large (13mm?) fastener on the top of the gearbox. LEAVE IT ALONE! Unless you are planning to rebuild your box, of course... (leave it alone)

gspd wrote: ↑Wed Apr 28, 2021 3:28 pm Sounds like your bike was subjected to a 1/4" amateur hose job.
The OE 7mm gas line(s) never had clamps, never needed clamps.

gspd wrote: ↑Wed Apr 28, 2021 3:28 pm I haven't had a 4 speed apart in decades, but from memory, the allan bolts on top of the gearbox adjust the shifter forks.

kmisterk wrote: ↑Wed Apr 28, 2021 2:55 pm
What’s the reason for this warning? Out of curiosity and future-sight.

Rob Frankham wrote: ↑Sun Apr 25, 2021 5:10 am Can't speak for the four speed box as shown but on the five speed box, you can remove the 13mm bolt as much as you like. it simply threads into the top of the casting and holds the airbox half casting retainers (early camshell airbox) or lower airbox casting (later rectangular airboxes) in place. In fact, with the later airbox, you have to remove the bolt in order to take off the airbox. The fixing to leave alone is the crosshead screw which is also in the top of the box. If you remove this, it will release a sheet steel oil channel which will drop into the gearbox mechanism and, should you try to use the machine before you have dismanlted the box to relocate it, cause horrendous damage.

Rob