empty tubes

bimbo

bimbo

Hero member
I have noticed that, after leaving the 750 for a few days this weekend, the fuel hoses were empty this morning. I'm a bit surprised as they have been properly cleaned and rebuilt...

as allways you comments will be appreciated.
 
You've run out of petrol  ;)

OK, assuming you have fuel in the tank and your fuel tap is closed, I can think of a couple of scenarios :
Has it been warm? Maybe some of the fuel in the float bowls has evaporated, allowing the fuel in the hoses to run through.
Are your float valves sealing properly? Perhaps they are allowing fuel to slowly leak through into the cylinders.

Cheers,
Cam
 
Make sure your fuel tabs are always closed when you park the bike!! Also before starting the bike now, please remove the spark plugs and turn the engine by hand. Make sure there is no fuel coming out of the cylinder. If to much fuel is in the cylinder, you might end up with a blocked engine, which can bent a rod.

I would assume one (or both) of the floaters were "hanging" or the needle wasn't closing.
 
Well, this evening I took the float bowls off and checked, there is no perceptable flow when the floats are held up, the only thing I could find wrong at all, if it is a fault, was that the carbs where not perfectly square with each other, so I put a square edge along the bottom of the bodies and sorted that but I dont think it would have caused the problem.

took it for a good spin after :D :D :D any excuse :D 
 
Maybe I'm missing something but having empty hoses (at least partially) after letting the bike unused for some days is quite normal, all my bikes do that. The float bowls are not always full when shutting the engine, there is some evaporation through the bowl vent, the fuel density changes while the engine cools down, etc...
 
Laverdalothar said:
I have that for different reasons: I shut the tabs roughly 1 Km from home. Always fresh gas in the floats when you re-start the engine...  ;)
Click to expand...


Lothar, I used to do something similar to that with my Z650. I'd let the bike idle with the taps closed to empty the carbs of fuel while stored for the winter

Geoff
 
I used to find my Monty a bit tricky to start from cold.
After spending lots of time swapping plugs, checking valve gaps, swapping out coils, checking ignition switch contacts, continuity testing ignition wiring and all manner of straw clutching nothing made any difference.

After hearing some stories about evaporation of volatiles from modern fuels I drained what remained in the float bowls and refilled.
First hit of the starter with 20ah goldwing battery brought a murmer from right cylinder and after a couple of turns the left one joined in.

Given how hot the Monty motor gets in use I assume the heatsoak after a run doesn't do the floatbowl fuel any favours.

Having now cured this problem my Monty is as easy to start as a Honda.


PS. I mean Casey Stoners Honda of course.

 
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