Purging Old Fuel In A 9Er?

[azza68]

 Gonna see more of this with water in the fuel.

 

I've stripped the tank and am trying to recover the pump assembly. The pump and filter sock appear to be toast; they're so clogged that no end of soaking is helping much. 

 

I've found that throttle body (slash carb) cleaner is best to remove the residue left by the fuel, and strong vinegar is good for the rust.

 

The amount of solid crud in the tank was amazing, even though the metal was only lightly surface rusted. Trouble is it's a diabolical combination; because the residue holds the rust in scaley clumps and protects it from the acid/vinegar. You've got to cut through the waxy part before you can get at the rust.

 

Yamaha quoted over One Thousand Aussie doll hairs for a new pump assembly; no parts are available as OEM, aftermarket only for parts. One fifth to one sixth the value of the bike in todays market. I can get a new pump for 200-230.