Author Topic: Gas leaks at injectors?  (Read 18714 times)

Offline dfx

  • ^ Motobrick Curious
  • Posts: 94
Re: Gas leaks at injectors?
« Reply #25 on: August 04, 2015, 05:02:30 PM »
OK now I'm really in it. :dunno2: I hope someone has the answer.
I changed the fuel lines and breathers, although I was a little sceptical about the difference it would make. The only fuel line that seemed dodgy was between the fuel rail and the regulator, but I saw no leaks. So at least I eliminated that from the equation. I left off the fairing lowers and did a short ride so that I could see straight away if the area around the injectors started getting wet or oily again. No problem, no apparent petrol smell. So today, filled up so I could start measuring fuel consumption and off I went to work. Was really enjoying the ride, but on the motorway around 20 miles from home suddenly felt wet stuff on my right leg. Looked up, no rain. Looked down and saw liquid coming out on the right hand side, could smell petrol at 80 mph. The stories of exploding bricks made me stop immediately, I'd just gone past a service station and pushed it back there. Got the tank off, and saw paint missing and bubbling from a small area, scraped at it a bit and noticed a tiny corroded spot. Jabbed at it with a screwdriver which pushed through easily. Came back after work with some kind of instant metal stuff for fixing holes patched it up, went home and came back later with the wife to pick the bike up. It started instantaneously, the orange fuel light was on as I'd drained a lot of fuel off. Went down the motorway came off and rejoined to go back the opposite direction. On the right hander coming onto the motorway, the red fuel light came on and went out as I straightened up. Normal, I thought. Then 3 miles up, I turn off, again a right hand bend and up hill and the motor just dies on me. The wife following had the the fuel I drained off in a jerry can, so I was able to add nearly 10 litres, but the red fuel light wasn't on and there seemed to be plenty already in the tank. No sign of a leak from where I filled the hole. Sat for a few minutes then tried to start, motor ran a split second then nothing wouldn't fire up. Waited again and the same thing, fires up a little then stops and doesn't even sound like it's going to start. It was now dark so I pushed it off the road and left it in a field. What could this be? Could it have anything to do with the tank leak and my reparation? Or the fuel lines I replaced? Just one thing, the return pipe from the regulator to the tank has no clamp at the tank end as I broke it getting the tank off this morning.
Desparately awaiting your answers before selecting which tools to take tomorrow. :popcorm
  • Alsace, France
  • K100RT 1986

Offline ts888

  • ^ Motobrick Curious
  • Posts: 50
Re: Gas leaks at injectors?
« Reply #26 on: August 04, 2015, 05:13:35 PM »
Possibly some of the patch material came loose and is intermittently blocking the fuel pickup?

Offline dfx

  • ^ Motobrick Curious
  • Posts: 94
Re: Gas leaks at injectors?
« Reply #27 on: August 05, 2015, 01:46:42 PM »
That sounds logical. But as I'd had the tank off upside down and at all angles trying to get to the hole without letting all the fuel leak out, I wonder if the filter was ever cleaned or changed in the last 30 years and I've blocked things up by shaking up the crud that must be inside. Going to try and get to the filter.
  • Alsace, France
  • K100RT 1986

Offline dfx

  • ^ Motobrick Curious
  • Posts: 94
Re: Gas leaks at injectors?
« Reply #28 on: August 09, 2015, 03:36:39 AM »
After removing the fuel filter completely, the engine finally started but wouldn't run at any constant speed, kept accelerating and dying. Switched off, heard a hiss on the exhaust pipe. Could only be petrol but how? Inspecting the injectors, I noticed a tear in the rubber intake hose on the far right. So holed fuel tank followed by airleak 5miles later.
  • Alsace, France
  • K100RT 1986

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