petrol tank swap

[irishbiker]

hello there guys , need some help . I'm working on a 89 3cv/3cw . I'm wondering if anyone has used a 1tx tank 86 on theirs if so any issues?

[aviationfred]

I don't know of anyone that has, I do know that the petcocks are different and they do not easily interchange.

The 86' petcock has a diaphragm and uses vacuum to operate. The 89' petcock is a free flow type and has the fuel pump to feed the carbs.

Fred

[Pat Conlon]

It can be done if you switch to the oem '84/85 petcock and put that petcock in the 'Prime' position.
A less expensive alternative is a adaptor plate and a aftermarket petcock, left in the open position.
I recall Randy @ RPM sells that adaptor and petcock.

Hope this helps. Pat

[edit] yep, here it is: http://www.rpmracingca.com/search.asp?pg=1&stext=Petcock&sprice=&stype=&scat=&sman=