My S1 XJ-12 has been in storage for a while, and after recently repairing the brakes I thought I would crank it over and see if I could raise oil pressure in readiness for re-commissioning. No result but a flat battery (I hadn’t bothered to pull the plugs first). But I was annoyed to step out into a pool of petrol, and that’s when I remembered that the die-cast float chamber covers on the bottom of the SU-HIF 44 carbs it’s fitted with are badly distorted, and if the engine doesn’t run regularly they leak.
What to do? I checked and found new covers are readily available, but are the same light-weight affair and will doubtless suffer the same fate, so I decided to CNC machine replacements out of billet aluminium.
Carbs are re-fitted now, and I’m back on track with bringing the old girl back to life again.
It hasn’t been a cheap exercise, but I’m pretty confident that the float bowls won’t be leaking in future.