Fuel lines and filters - Ambassador

[Ambo_bubba]

Good evening,

I'm currently in the final stages of the restoration on my 71 ambassador and am connecting fuel lines to my fuel tank and carbs. I decided to update the petcocks to the newer type with a true reserve with adapters from MG cycle. Unfortunately, the adapters don't have a place for the small filter that goes with them.

My thought is to instead run inline fuel filters like you would see on boats and other types of vehicles. Is this necessary or common practice?

My other issue is when trying to line up the generic fuel filters I got from Advanced, there's not enough space to run the crossover for the fuel lines. I'm considering getting the dual inlet banjos for the carbs and running a line between the carbs instead of the cross over, but it got me thinking, with the updated petcocks, is the crossover even necessary?

Why couldn't I just run a line to each carb from each petcocks and not worry about interconnecting the two?

Thanks!

[Cam3512]

Buy the DOUBLE banjos for each carb.  There’s a filter underneath each.  Run fuel line from left petcock to right carb, right petcock to left carb.  Then another line between each carb.  No need for the “X” setup.  Just more points to leak. 

[guzzisteve]

+1 on what Cam says, that's what I been doing since 77 when I changed the T I bought new year before. Less hose & clamps.

[Moparnut72]

I ran a separate hose to each carb on one of my airheads. No problem kind of nice because the right carb ran out before the left that way the bike didn't go completely dead when the fuel started to run out. A safety feature in heavy traffic, still had some power to switch petcocks to reserve.
kk

[Ambo_bubba]

Double banjos are on order, thanks all for your input!

[Antietam Classic Cycle]

Good evening,

I'm currently in the final stages of the restoration on my 71 ambassador and am connecting fuel lines to my fuel tank and carbs. I decided to update the petcocks to the newer type with a true reserve with adapters from MG cycle. Unfortunately, the adapters don't have a place for the small filter that goes with them.

My thought is to instead run inline fuel filters like you would see on boats and other types of vehicles. Is this necessary or common practice?

My other issue is when trying to line up the generic fuel filters I got from Advanced, there's not enough space to run the crossover for the fuel lines. I'm considering getting the dual inlet banjos for the carbs and running a line between the carbs instead of the cross over, but it got me thinking, with the updated petcocks, is the crossover even necessary?

Why couldn't I just run a line to each carb from each petcocks and not worry about interconnecting the two?

Thanks!

My 2 cents worth...

The hole in the MG Cycle adapters is too small and kinks the clear plastic standpipe. I always enlarge it to 1/4". On one set I drilled the top a bit larger, tapped it M8-1.0 and used the filters from the old petcocks.

The easiest filter to add is the small tapered cone shaped one from Visu-Filter
https://www.amazon.com/Visu-Filter-Universal-In-Line-Fuel-Filter/dp/B00J4ZAOIA
But, if you can retain the in-tank screens, the filters aren't really necessary IMO.

[Cam3512]

Buy the DOUBLE banjos for each carb.  There’s a filter underneath each.  Run fuel line from left petcock to right carb, right petcock to left carb.  Then another line between each carb.  No need for the “X” setup.  Just more points to leak.

Gotta give credit to Charlie.  He schooled me on this setup.  I still use the braided BMW fuel line.  No clamps needed, change out every few years.

[Antietam Classic Cycle]

Gotta give credit to Charlie.  He schooled me on this setup.  I still use the braided BMW fuel line.  No clamps needed, change out every few years.

I've switched to Tygon hose, which also needs no clamps, but I use 3/8" spring clamps anyway. It's not ethanol proof, but gives plenty of warning that it needs to be changed - shrinks a bit, turns a little brown, never cracks. I change it annually, but it could go longer. https://www.mcmaster.com/5552K25/