Well decided to fire the R1 up after about 3 months, ignition on, fuel pump on, choke on, crank it over, popping and banging so undo the float drains tighten them up and try again, this time it starts well sort of. as much as look at the throttle pedal and it stops, much cursing and swearing and I thinks to myself hang on your always saying to people with same problem check the jets, so off with the carbs, turn upside down remove float bowls, remove and clean jets even though they looked ok, reassemble press starter, quick pop and bang and away we go revving quite freely,
Strange thing is it's only R1 the Blade can sit in the garage for months and months and fires up straight off, I'm convinced it's got something to do with the difference in material that Yamaha and Honda make their float bowls out of.

tony

my 893cc blade after not having the engine run for a few months will often pop & bang running rough on 3 cylinders, have to take out the offending wet plug & dry it off, then we're firing on all cylinders again.......maybe i'm using to much choke?

Not even sure if it's manufacturer specific, my current bike is a ZX9r and even after a month standing
the carbs wee about. Previously had a ZZR600 which never gave any grief even after a 4 month layup.

In my past bike experience I found this to be a problem. So had a routine of always draining off the bowls when standing the bike for any period of time. Didnt take long and certainly not as frustrating as doing it at start up time.

Something to do with unleaded solidifying over time I was told.

Worked for me...

Interesting - I have ZX6R Mikunis on my Zetec and they work fine after standing for a couple of months.

Stu

Anyone considered moidture getting in the HT electrics, ie a bit of condensation moisture fouling the sparks?

Just a thought.. Everyone is looking at carbs and fuel, which it could easily be. It could be something else.

I usually check stale fuel by squirting a bit of propane into the inlet manifold. If it bursts into life or runs a lot better then, it is carb / fuel related.
Doesnt need much just to prove the point.

Just my 2 reils worth.

Put a switch on your pump or a tap after the pump and run the floats out before you switch off if you are parking it up. I used to do it with the bike and had no problems.

tried that a few times as an experiment on both the r1 and blade, no problem with the blade but r1 always needs bowls cleaning as the insides seem to go furry.

tony

Had absolutely no issue with my ZX12 after it was stood for nearly 2 years on the garage floor. Wired up...swap the fuel feed and return lines rounds once i realised i was pressurising the return feed....doh. Hit the start button....and away she went. Faultless.

I never had problems with the carbs, but if it was stood for a couple of months it wouldn't start. I found if I switched on the ignition then pulled the ECU plugs out, then put them back in, it fired up nicely.