[QUOTE="messenger1"]\nThis bike is driving me nuts. Its a 1985 GPz900 that up till about 3 months\nago ran fine, started fine and gave me no problems. Now, it will absolutely\nNOT start unless its warm (being in Canada in fall and winter that entails\ncovering it and putting a space heater under the cover) I have cleaned and\nadjusted the carbs 7 times now. In desperation I bought a dynojet kit in\ncase the 4-1 Muzzy or the K&N pod filters were affecting the mixture enough\nto prematurely foul my plugs. Plugs have been replaced each time I clean the\ncarbs (even though they looked fine). Each time I clean and reassemble the\ncarbs, the bastard fires right up, runs like new, and even idles fine.\n(although, it will die if full choke is applied quickly) After it cools, it\nAGAIN will not start cold.I have installed an inline fuel filter, and it\nlooks clean each time I remove the tank/carbs. Each time I remove them, the\ncarb bowls are full of fuel and they don't piss out while installed.The\nintake boots are fine, no vacuum leaks, the engine has lots of compression\nand when its finally running it starts and shuts down great.\n\nIn desperation I have even tried an old kawy Z trick of wiring a relay up to\nprovide a full 12+ volts at the coils, no help.\n\nAny help folks??? I'm at my wits end and have been eyeing a gas can, a\nlength of yarn and a wide open spot in my backyard and calculating the odds\nof my neighbors calling the cops while it burns there. Please don't let this\nnice old bike suffer a tragic end at my deranged hands!\n\nWhile I was in at the local Kawy/Duc dealer buying new o-rings and washers,\nI spotted a 2003 Z1 NOS for 7g's. That may be enough to push my unstable\nself right over the edge.....\n\n\nTIA!\n\nTom B\n[/QUOTE]\n\nMaybe a weak/marginal battery? Time for a replacement?