It may be worth running it for a while on premium fuel, and/or trying a fuel additive carb/ injector cleaner, Forte and Marvel Mystery Oil get good reviews. It might not work but it beats stripping the carbs if you can avoid it, Good luck.
What is winterising the carbs? My bike has lived outside in all weathers, summer, winter, sometimes sat for 2-3 months at a time. I've never bothered doing anything with the carbs and never had a problem with them...The problems I have had are around corrosion of the caps and plugs. It happens every year, as water sits around the top of the engine. It does exactly what your describing. Misfires at full open throttle. Back off on the throttle and the revs pick up.It's to do with having a week spark and as the resistance of the air fuel mix changes it misfires.It's a lot easier inspecting your caps and plugs then taking your carbs apart.
Hello again everybody, a few days ago i completed my driving exams (hurray) and took my bike for spin. It was amazing as it should have been, but i ran into some problems (as it shouldnt have been). At around 6.5-8k rpm at full throttle the bike seems like it almost cuts fuel off. Then at 8k right at the power band the bike flies all the way to max rpm. It seems to happen at 2-3rd gear, too scared to try first and not enough space to go 4+ gear .
So what are your suggestions? Last owner didnt winterize the carbs, are they the problem? How can the power stop, then come on at full force later?
Presumably you can determine the likelihood of rust going from your tank to the carbs by inspecting your fuel filter under the tank.. If it's a dirty rusty colour or white.
Buy some seafoam.Run the bike til there is hardly any fuel in the, tip in the seafoam into the fuel tank and run it till it stops smoking. Then top up with nice expensive fuel and take it for a blast down the country lanes, razzing it as much as you can.When you are back at home with a grin on your face the bike should be performing much better on the way home.If that does not work out for you it will be time to clean the carbs.
Quote from: Hugh Jass on 21 May 2018, 03:18:52 pmBuy some seafoam.Run the bike til there is hardly any fuel in the, tip in the seafoam into the fuel tank and run it till it stops smoking. Then top up with nice expensive fuel and take it for a blast down the country lanes, razzing it as much as you can.When you are back at home with a grin on your face the bike should be performing much better on the way home.If that does not work out for you it will be time to clean the carbs.It's doubtful it will clear a blocked jet and it certainly will not sort out the contamination problem i.e. the rust or debris. These additives are little more than detergents and will do nothing to permanently sort this kind of problem.
As above, try the most inexpensive way first, it may be all that it needs.I've always used this gear, in fact i'm using it right now in my tank, and is the only one i've ever tried that i notice a difference after a few days.During winter my bike probably doesn't get up to a decent running temperature when it's very cold as my commute isn't very far so it appreciates a system clean up at least once a year. Used to be £15 a bottle in Halfords but they've stopped selling it so at least now it's a sensible price online. https://www.ebay.co.uk/itm/STP-Petrol-System-Cleaner-Fuel-400ML-Powerful-Additive-Petrol-Treatment-/323244674523?_trksid=p2349526.m4383.l4275.c10
Quote from: darrsi on 21 May 2018, 06:46:38 amAs above, try the most inexpensive way first, it may be all that it needs.I've always used this gear, in fact i'm using it right now in my tank, and is the only one i've ever tried that i notice a difference after a few days.During winter my bike probably doesn't get up to a decent running temperature when it's very cold as my commute isn't very far so it appreciates a system clean up at least once a year. Used to be £15 a bottle in Halfords but they've stopped selling it so at least now it's a sensible price online. https://www.ebay.co.uk/itm/STP-Petrol-System-Cleaner-Fuel-400ML-Powerful-Additive-Petrol-Treatment-/323244674523?_trksid=p2349526.m4383.l4275.c10Damn! That was the one I have used before with great success, I was trying to find on eBay, but failed., But now I have the link, I had forgotten the name /make of it.Cheers
I was shown the brown sediment in my carbs when i had mine cleaned a few years ago, i take it there's no tricks for it to be removed via the carb drainage holes?