Hi
@ace123,
I took my 900T out for a run last weekend, to make sure nothing had seized etc. (had been laid up for over 2 years).
Apart from running a bit hot (I'm working on that) all seemed to be okay.
However, the fuel tank was only on 1/4 and the fuel nearly 3 years old so I thought I'd top the tank up with a couple of gallons (E5 Super).
That's when the problems started... kept cutting out every few yards (took over an hours to drive the few miles back home).
Adding fuel must have stirred up the rust in the tank, blocking the fuel filters and fuel lines.
I have a clear (glass) filter fitted just before the electric fuel pump. This didn't look too bad but it was only 1/3 full of fuel so I changed it... still only 1/3 full with a clean filter. Seemed odd, so I used a foot pump and blew air back along the fuel line to the tank (petrol cap removed) - you can hear the bubbles in the tank. After reconnecting the fuel line the glass filter is now full - there must have been some muck in the fuel line or main pick up in the tank.
Next to the carb - the small carb filter was full of rust.
Annoyingly, I dropped this into the engine bay, never to be seen again
Luckily I have an old carb for spare parts and I have one in that... I doubt you can buy them anymore.
I'm going to fit an extra in-line filter just ahead of the carb to help catch the left over muck before it gets to the carb. However, before I fire her up again I need to check the float chamber for muck and clear the jets.
Ironically, this may also help with the hot running as it's likely to have been running very lean with all the muck in there.
If you haven't already, check the fuel flow to the carb. It's probably worth reverse blowing the fuel lines as a precaution - Make sure you remove the fuel tank cap first, otherwise the pressure build up will force the petrol back once you stop the airline.
Hope this helps.