I ve a 2000 W650 that simply doesn t want to start after sitting in my cold 40...

I've a 2000 W650 that simply doesn't want to start after sitting in my cold 40 degree (Fahrenheit) garage for over 3 days. New battery and fresh charge...still won't start. Any help would be appreciated, or is this just the nature of this beast.

  • Pull your lead off one of the plugs and stick one on it outside of the engine and see if you have a spark.

  • How old is the petrol? If the petrol has been sitting then it will begin to separate and you will have filled the carbs with water basically. Make you drain the carbs and use fresh petrol along with the other advice.

  • I should mention that petrol can split very quickly in low temperatures.

  • My W once stayed outside for three weeks, with temps around minus 10c. Started first kick. Either the OP flooded the carbs by turning the petcock on PRI, or there is a weak battery problem.

  • Ok. Got it going by not putting it on prime, just pulled out choke and it fired right up. Thanks all. Let's ride.

  • You got two chairs? A daily and a bridal one?

  • i actually have 3. One on a Vespa GS160 scooter w a hopped up P200 engine and a "leaner" hack on a '58 Triumph 3TA bathtub with a T100 motor. All super fun.

  • At the moment I've got 3 bikes, the W has a car. Looking into adding a car to the Zero, and aiming to buy a new scooter. Have to get me another garage first :-(

  • Forgive me, but isn't putting the petcock on "prime" the same thing as simply turning it on? Why should that cause a flooding problem, unless the float valves aren't right? Many owners replace the vacuum petcock with a standard on/off/reserve one without trouble...

  • The answer is in your question... It's a vacuum petcock, not a standard gravity one. You shut the bike off and the vacuum operated valve in the petcock will close the fuel line when the bike is not running and the vacuum is absent. When you put it on PRI you bypass the valve and gas just floods the bowl. Good if the bike hasn't been running for a SIGNIFICANT amount of time, and the bowls are empty. If you turn it on PRI (or leave it on PRI) for no reason you automatically flodd your carbs.

  • Thanks Jack. I know it's a vacuum petcock, and I understand how it works. What I don't understand is the assertion that leaving it on prime will "flood" the bowl and prevent the engine from running. Many W owners switch out the vacuum petcock for a "standard gravity one", which, when on, functions just like the vacuum one in "prime" position. No flooding problems. So I still don't understand how the "prime" position would be the cause of the problem, provided the carb float valves are working and the float levels are correct. I'm not saying it ISN'T the cause, mind you... it seems to have solved Gerry's problem. Just trying to sort it out...

  • It shouldn't and on a healthy bike it wont flood the bike, it would onky flood if the float needles were sticking, have crud in them holding them open or otherwise faulty and staying open. It is their job to close off when the carb bowl is full of fuel to the set level. It would only flood if the carbs have an issue, and if that were the case it would also flood while riding and stall or run horribly at best

  • I told you so ;)

  • I use prime when the bike has been standing a couple of weeks to make sure the float bowls are full. Leave it on for a minute then turn to normal, before starting, lest one forgets....