I'm planning a gravity fed aux tank on my NC750s which has the main tank under the pillion seat. I’ve read a lot on here about not having the aux tank larger than the main tank which is only 14lt 3.8gallons and the danger of the main tank flooding, but what if I just create one large tank?
Aux tank mounted directly over the main fuel tank.
AN8 weld on bulkhead fitting in left and right side of main tank. Yes, twin fuel lines as I want a quicker fill from both tanks being empty .
I plan to weld a blanking plate over the existing gas cap hole.
The breather tube just behind the gas cap I will reroute using fuel line to the top of the aux tank but I’m concerned that a) its a tiny bore b) it probably has a roll over bearing in it which may stick and cause a vapor lock and due to its location be inaccessible, so perhaps blank this off and fit a third bulkhead fitting to run a larger bore pipe up to the aux tank with an inline roll over valve.
Aux tank breather run down and connected to old breather tube run.
It sounds to simple to me so that makes me think I’ve missed something important! Any advice?
Aux tank mounted directly over the main fuel tank.
AN8 weld on bulkhead fitting in left and right side of main tank. Yes, twin fuel lines as I want a quicker fill from both tanks being empty .
I plan to weld a blanking plate over the existing gas cap hole.
The breather tube just behind the gas cap I will reroute using fuel line to the top of the aux tank but I’m concerned that a) its a tiny bore b) it probably has a roll over bearing in it which may stick and cause a vapor lock and due to its location be inaccessible, so perhaps blank this off and fit a third bulkhead fitting to run a larger bore pipe up to the aux tank with an inline roll over valve.
Aux tank breather run down and connected to old breather tube run.
It sounds to simple to me so that makes me think I’ve missed something important! Any advice?