HELP, after a winter lay up for new tyres, fork seals, and new pads all went well and put it all back together, fired her up without any problems went for a spin round the block and back in the garage with a big smile, now when I went to start it up a couple of weeks ago my problems started it only fired up on three, the left pot looking to the front wasnt firing, thinking Iwill do that the weekend left it come the weekend now I only have two firing up and thats just the middle two, now Idont have any it just turns over smells of petrol and backfires now and again, any pionters before I dive in would be appreciated thanks in advance Rob.

Have you tried a new battery, they need a good kick to fire up

cheers but the battery is nearly new as are the plugs, I just thought I"d ask before I dive in as sometimes someone may have had a similar problem and knows just where to start but I guess it will be a process of ilimination starting with the sparks and ending up with the carbs

Try draining the fuel if its the same old stuff it had in the tank last time you rode it and give it a fresh drink of lovely octane juice.
If that fails to sort the issue i would suggest check the plugs and see if they are either sooty or wet with old fuel. A simple plug clean and re-install should be ok but they may have to be replaced.

Good luck.

cheers for the info thats my first job for tonight only cos its easier to do the plugs than strip the carbs but will keep you informed thanks for your help guys Rob.

happy days new plugs new fuel press button and hey presto purring like a kitten