Fuel Starvation

[Poseidon]

Okay folks... the joy of triumph ownership is biting me in the arse again!

I have two major problems with the bike, firstly as the thread title suggests, she's being starved of fuel. When the fuel tap is on prime (gravity feed) she starts and runs ok. Once the tap is turned onto either "on" or "reserve" (vacuum), she runs for a bit and then dies. She basically uses what fuel is in the lines and then doesn't get any more. I've checked the fuel lines are connected, and that the tap works correctly but still the problem persists. I did have the fuel tank off yesterday to change the spark plugs (all three were in decent condition and were a loverly brownish colour), I took her our for a blast yesterday and there was no fuel problem then, it's only happened overnight!

The second problem is a strange one. When I'm riding along, The bike will intermittantly lose all power and run very rough, almost like the timing is out. At the same time, the rev counter goes mental (swings wildly from side to side and frequently drops off the bottom). There doesn't seem to be any pattern to when it occurs. It's happened under gentle and harsh acceleration, when cruising at low revs/low speed, when blasting at high revs/high speed... it's not limited to either hot or cold engine temp. The only things I can think of are either a broken cable inside it's sheath or else it's the igniter, as thats the only component that controls both ignition timing and rev counter. Plugs and leads are both sound so it's not that... and the fuses are all fine!

The second problem is not linked to the first as the power loss occured before the fuel problem. The fuel problem only surfaced after I took the tank off the sort the plugs out to try and solve the power problem .

Any opinions appreciated and any help will be rewarded with a healthy dose from the dispenser!

Many thanks
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1977 Honda CG125
2002 Ducati Monster S4 (currently restoring)

[clancy]

with the fuel issue, have you taken the carb of and checked the float bowl and the needle?
if the float bowls stuck in the worng persition, that may be your problem.

id take the carb off, check it and clean it.

i have no idea about your power issue im affraid.


anyway, hope that helps.
leigh.
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KLX 300r

[finpos]

Fuel - you'll have kinked, squished, accidentally pulled off or forgot to put back on the vacuum line, looks like you'll need to take the tank off again.

Ignition problem - spot on, most likely a loose or broken connection. Good luck finding it if it's intermittent!

Does it ever start misfiring when it's stationary (i.e. in neutral)?

f.

[Poseidon]

[Poseidon]

Firstly, I will spend hours with a lovely assistant checking wires with a continuity tester...

Secondly I found a kink worse than a pee fetish in the vacuum line. Un-kinked said line and there is no longer a fuel problem!

Now... if I only had a continuity tester!
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1977 Honda CG125
2002 Ducati Monster S4 (currently restoring)

[Poseidon]