Reserve with big carbs

S

Storbeck

Location
Minnesota
46mm and especially 48mm+ carbs generally people seem to use individual fuel lines straight to the tank.

Does anybody use reserve with these somehow?

Yamaha uses a single line with reserve even on 1200 tripples, so it seems like one line *should* be able to supply enough fuel even for a pretty good sized twin, but it would be comforting to see somebody doing it successfully.
 
Chase Musetti

Chase Musetti

Location
Winter Park
I don’t have my switch with reserve anymore- but I run a single line to dual 46 carbs without an issue. A single line with supply more than enough fuel.


Sent from my iPhone using Tapatalk
 
Quinc

Quinc

Buy a Superjet
Location
California
After you ride a few times and check your fuel usage after each ride you get a good idea of when you need to refuel.
 
MTRHEAD

MTRHEAD

Location
MotorCity
Storbeck said:
46mm and especially 48mm+ carbs generally people seem to use individual fuel lines straight to the tank.

Does anybody use reserve with these somehow?

Yamaha uses a single line with reserve even on 1200 tripples, so it seems like one line *should* be able to supply enough fuel even for a pretty good sized twin, but it would be comforting to see somebody doing it successfully.
Click to expand...

The GP1200 is more than big enough for a 150hp twin. The GP1200R system (single line) is even bigger in diameter and can supply well into 200hp
 
S

Storbeck

Location
Minnesota
Thanks guys, looks like the GPR parts are readily available pretty cheap, so for peace of mind I'm thinking that's the way to go.

Still would love to hear from somebody that's actually doing it though.
 
Freakie

Freakie

Location
Cape Town
If you run a high hp motor past the reserve limit...a good few times...I would worry more about lean seizures and then how much more strain the engine takes when you cranking hard to re-prime the whole fuel system after you switch to reserve...if the battery lasts...I am with Quinc on this
 
Req

Req

Location
SW Tenn
Dual clunks for dual carbs seem like it could be a recipe for its own disaster. If one of the clunks gets put in a position that is higher than the other near empty couldn't you lean seize or gouge a piston and cylinder fairly easy? I always wondered how people got around that. Don`t run it that low I guess?
 
Big Kahuna

Big Kahuna

Administrator
Location
Tuscaloosa, AL
Req said:
Dual clunks for dual carbs seem like it could be a recipe for its own disaster. If one of the clunks gets put in a position that is higher than the other near empty couldn't you lean seize or gouge a piston and cylinder fairly easy? I always wondered how people got around that. Don`t run it that low I guess?
Click to expand...
IF the clunks are the same length this will not happen. I have stuck a few pistons running WOT and running out of gas on a single carb. never on dual's with dual fuel feeds.
 
V

Vortex

Location
Southeast
Req said:
Dual clunks for dual carbs seem like it could be a recipe for its own disaster. If one of the clunks gets put in a position that is higher than the other near empty couldn't you lean seize or gouge a piston and cylinder fairly easy? I always wondered how people got around that. Don`t run it that low I guess?
Click to expand...
Cut the lines equally and Zip tie them together.
they kind of drift around and follow the fuel as it sloshes around. And yes don't run it down to less than a gallon
 
Octane_114

Octane_114

LeT tHe gOOd tImEs RoLL
Location
Charleston S.C.
Vortex said:
Cut the lines equally and Zip tie them together.
they kind of drift around and follow the fuel as it sloshes around. And yes don't run it down to less than a gallon
Click to expand...


That is how I do it, dual chunks, equal length lines and zip-tie them together towards the bottom.
 
Robbie8984

Robbie8984

Location
Uk
built my old flat water ski with dasa 1100 and dual dasa 48’s.

Ran stock fuel tap and hoses and worked a treat.

Your putting a 060 jet in the return fuel line so not like there will be a restriction in the single feed line with 5mm I’d fuel hose. They do drink fuel but not that much

My thoughts any way
 
S

Storbeck

Location
Minnesota
wmazz said:
A lot of engine failures are incorrectly blamed fuel pumps, and lines.


Bill M.

Have you had an engine failure?
Click to expand...

No, but I've never had anything bigger than stock 38's. Setting up an 898 now (well, I'm setting it up over the winter, I have a lot of time to ponder it).

Appreciate people offering up their experiences.
 
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