alloy fuel tank - threaded outlet

[mainline]

is there an easy/easier fix for this than cutting the old one out and having a new one turned up and welded in?

I started doing some work on the 125C tank this arvo, unscrewed the the fuel tap and there was nil thread on the alloy spigot welded to the tank. You could see where it had been though   The bike must have belonged to a plumber at some stage cause there was a heap of old thread tape in there, which seems ironic given there was no thread.

[frostype400]

Hang on the plumber line there is a bit unfair I am an apprentice plumber and I wouldn't do that proper fix would be the go.

[Davey Crocket]

That plumber would have charged a fortune to do that as well!!

[mainline]

I am an apprentice plumber and I wouldn't do that

that's cause you're not old and jaded yet

[frostype400]

  I might start taking my camera to work it would just get broken but I'd get some funny pics before it broke people do some funny things.

[Davey Crocket]

The thread on that fitting is 14x1.0 mm, very fine thread and easy to strip! I have a die nut to clean the thread up Paul but  if you weld another spigot onto it you will either have to buy a rethreading dienut (will be exspensive- maybe $100+ as its not a common thread pitch.....14x1.25 or 14x1.5 is common ) or fit some other kind of tap. Most taps are around $70. Dammed if you do, dammed if you dont!!. I would probably get a flat plate welded onto it and fit a YZ-H type tap. If you want to bring the tank around for me to have a look thats OK. PM me. Cheers John.

[Davey Crocket]

PS, beware of dodgy oldfart plumbers!!!

[Rossvickicampbell]

I also have a spare tap if needed as they were fairly common on that era Yamaha - problem is the inner seal doesn't last long and isn't listed as a spare part.  if you have to modify it like Davy is saying maybe better in the long run?

cheers

Rossco

[oldfart]

Mainline ,  an easy repair would be to come down one size ...NTP - BSP - and use an FI x MI  adpt to bring it back to correct thread.   If you have trouble reading what I have  typed  Frosty will put you straight  

[Davey Crocket]

Look 3 posts up

[Davey Crocket]

The spigot coming out of the tank is quite thin Stu and Rosco your right about the taps leaking...... I've bought new ones and they have leaked straight away, that inner seal shrinks bad, plus the fact the friggin things are older than Frosty! Hey Frosty, are you coming to the Nats?.

[YZ250H]

C type tap or H type more reliable .  I have not had a lot of luck with H type (same as F),  I think neither has mainline 
He would probably rather poke an eye out with a fork than use one of those crap things .

[Davey Crocket]

Maybe fit a later 2000 model onwards type tap then......would still have to weld a plate on though.

[frostype400]

Sounds like a bugger to fix good luck with it, I don't know about the Nats if not this year next.

[oldfart]

Yeah I saw your post, and left it alone.  A bit like naughty kids you don't reply and they go away.