2 STROKE WORLD .net

The 2-Stroke Garage => Turning Wrenches => Topic started by: 85RZwade on September 26, 2020, 12:53:28 AM

Title: Fuel tank conundrum
Post by: 85RZwade on September 26, 2020, 12:53:28 AM
Looking at fuel tanks for my project: XS360 with one fuel valve, XS500 with two (one on each side). What do you think about a fuel valve for each carb...good, bad or indifferent?  :umm: :help:
Title: Re: Fuel tank conundrum
Post by: m in sc on September 26, 2020, 08:36:47 AM
my bike has 2. just needs a crossover
Title: Re: Fuel tank conundrum
Post by: 85RZwade on September 26, 2020, 08:45:23 AM
Whattya mean, boss? I haven't had coffee yet this morning...do both valves need to feed each carburetor?
Title: Re: Fuel tank conundrum
Post by: m in sc on September 26, 2020, 10:03:22 AM
typically on dual feed tanks,  the lines connect from left to right at some point. this keeps the tank from starving one carb or the other. so, a t or junction is used to connect the halves. sometimes it's right at the carb. on my rd, the 2 lines come out and go to a junction block then feed back out to the 2 carbs.  so, it doesn't matter how you do it, but they should connect to each other after the tank fitting to some capacity.
Title: Re: Fuel tank conundrum
Post by: 85RZwade on September 26, 2020, 11:24:12 AM
Thanks, that makes sense
Title: Re: Fuel tank conundrum
Post by: pdxjim on September 26, 2020, 03:04:41 PM
This is going on LC frame, Wade?
Title: Re: Fuel tank conundrum
Post by: Dvsrd on September 27, 2020, 05:28:17 AM
If all else is equal, a tank with 2 taps should be better. Since the interconnect hose is after the taps, removing the tank is less messy. Single petcock tanks, like RD tanks,need a quick connect with shutoff in the balance hose. 2 petcocks is just a better solution.
Title: Re: Fuel tank conundrum
Post by: 85RZwade on September 27, 2020, 09:28:21 AM
Yes Jim, it's for the LC frame. I'm looking at an XS360 tank which is in very nice condition, has a single mounting point at the rear like the LC frame but doesn't come with a fuel valve or cap:
https://www.ebay.com/itm/1977-Yamaha-XS360-XS-360-Y668-2-red-gas-fuel-petrol-tank/293705403382 (https://www.ebay.com/itm/1977-Yamaha-XS360-XS-360-Y668-2-red-gas-fuel-petrol-tank/293705403382)

And an XS500 tank which is more beat-up, comes with both fuel valves, a cap and key but has two mounting points at the rear:
https://www.ebay.com/itm/1975-1977-YAMAHA-XS500-BLACK-FUEL-TANK-PETCOCKS-CAP-KEY-OEM-1A8-24110-01-09/253229561412 (https://www.ebay.com/itm/1975-1977-YAMAHA-XS500-BLACK-FUEL-TANK-PETCOCKS-CAP-KEY-OEM-1A8-24110-01-09/253229561412)

It's a toss-up. I like the value of more included parts and the dual valves, but less dent repair is also appealing. Leaning towards making an offer on the 500 tank.
Title: Re: Fuel tank conundrum
Post by: m in sc on September 27, 2020, 09:41:24 AM
always the fuel valve is shit & plan on replacing regardless. go for less dents.   :twocents:
Title: Re: Fuel tank conundrum
Post by: pdxjim on September 27, 2020, 12:46:02 PM
You can get a brand new repop LC tank for about $400 shipped from Japan or UK.
Title: Re: Fuel tank conundrum
Post by: dgorms on September 27, 2020, 10:48:40 PM
Wade, I might have a few options for you....................................D
Title: Re: Fuel tank conundrum
Post by: 85RZwade on September 28, 2020, 08:55:14 AM
I'm looking for a different shape than the original LC tank; looks like I need to get a front wheel under it for a trip to see uncle Dennis!