SOHC.co.uk Forums > CB750

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K2-K6:
It seems to me that even with some newer bikes it's the same, in that if left without running for more than a week then it is certainly reluctant to fire and may flatten the battery. Most don't have a kickstart now either so it's often a run-and-bump it first time, then after a run out all ok again.

Bryanj:
A lot of "Modern"(since 85) stuff needs the carbs drained if stood for a week as the "New" style petrol goes off quick

Lobo:
..... sorry to darken this SOHC webside with Italian / modern stuff (a weak moment, but bloody love it), but since Brian & K2 -Tec Gurus - on about fuel can you comment how best to look after a rarely used injection bike / nil fuel tap / nil kick start / shaft drive. Have gotta say, after almost a year ownership no probs, always starts first time, but anything proactive I should be doing guys.... fuel additives etc?

And further to this which brands of petrol best to use / avoids?
Cheers,
Simon

SteveD CB500K0:
An Optimate and fuel stabiliser!

K2-K6:
I haven't yet used stabilser but as Steve says it does look like that route may certainly become more normal to prevent some problems that seem to be more frequent from evidence of posters on here.

I haven't looked at the guzzi system specifically, but most fuel injection holds an advantage over carbs when talking about this problem. The fuel is usually run from the tank by a pump in a circuit with a pressure relief valve that allows excess fuel to be passed back into the tank during use, this has the effect of moving localised fuel away from the injectors and effectively mixing the tank contents which will go towards helping reduce starting problems.
Along with the high pressure atomisation that a injector nozzle conditions the fuel with, it should show the lowest level of problems in being left.
Along with Steve's notes, just a simple shake of the bike so that the tank is mixed when you are near it should also help.....seems odd but it helps the fuel mix from stratifying into layers that can assist the deterioration process.

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