randi
Junior Dawg
Posts: 6
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Post by randi on May 30, 2011 12:31:41 GMT -5
I have a piaggio bv250. Twice lately after about a 20 minute ride I have been unable to get the scooter to start after it has been setting for 30 minutes. Heat is a factor as both days were between 95 and 100. Motor turns over but will not start. Any ideas as to what the cause is or what to look at?
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Post by Kiwiscoot on May 30, 2011 15:32:31 GMT -5
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Post by edfr on May 30, 2011 15:38:36 GMT -5
It could also be your valves are a little to tight, causing loss of compression and with the heat even more so. I would check the valves and adjust them. Lefty
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randi
Junior Dawg
Posts: 6
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Post by randi on May 30, 2011 16:48:03 GMT -5
If it were vapor lock how would I fix the problem?
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Post by edfr on May 30, 2011 16:55:50 GMT -5
You will not get Vapor Lock on Scoots, so don't even bother with that, Vapor lock will happen only when the thing is awfully hot usually caused by the Fuel Lines running to close to something really hot. In your case you cannot even get it to start to get it hot. You can also try opening the Gas Cap, it might not be venting the fumes since it is so hot not allowing fuel to flow. I am telling, first check your valves and adjust them I bet the Exahust Valve is really tight. Lefty
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randi
Junior Dawg
Posts: 6
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Post by randi on May 30, 2011 19:00:46 GMT -5
Ok. Some more info. Rode for about 15 min. Stopes for lunch for 30 min. Temp outside 95deg and parked in sun. Went to get on scooter but would not start. Would crank, but sounded like like no fuel was getting to cylinder, i.e. No pop when spark would hit gas. Pulled plug and it was dry. Got towed home by a wrecker. Waited three hours and scooter started. Does that help differentiate between vapor lock or tight valves?
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randi
Junior Dawg
Posts: 6
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Post by randi on May 30, 2011 19:04:12 GMT -5
Forgot to mention that I opened the gas cap when it would not start and heard a whoosh sound, but it would still not start. Hot temps has something to do with the problem because this problem did not start until the outside temp got above 90 deg.
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randi
Junior Dawg
Posts: 6
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Post by randi on May 30, 2011 19:07:02 GMT -5
Thank all of you for your help. I ride the scooter to work every day. If I can't solve the problem I will have to ride a bicycle to work. Not much fun when it gets to 100+ in the pm.
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Post by edfr on May 30, 2011 19:52:13 GMT -5
If you heard a WHOOSH when you opened the gas cap off, it is NOT VENTING. Check if you have a hose coming from the Top of the tank to some canister if so check the canister some have a Vacumm line going to it to open a dighapgram in it to relieve the pressure. So check the Vacumm line if it has one. If it does not have a Vent Hose then the Gas Cap should have a vent hole in it to relieve the pressure. If not some have drill a small little hole on the top of it. Lefty
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Post by Kiwiscoot on May 30, 2011 20:34:00 GMT -5
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Post by ootscoot on May 30, 2011 20:59:47 GMT -5
We recently had a BV 250 (very nice bike!) in for the same issue. Turned out the fuel tank was very full, excess fumes and gas were venting into carbon cannisters and then into airfilter. On some bikes this excess can also vent into the carb., causing a flooded situation. On the EFI, this is not a problem. Also it is important to check your crankcase oil - if it smells like gas and is extra full - best to change your oil. We disconnect gas tank vent from cannister, open air filter to clean and dry, drain clear blowby tube, check and change oil if needed.
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randi
Junior Dawg
Posts: 6
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Post by randi on Jun 1, 2011 7:42:47 GMT -5
scooter is 2009, but only has 2200 miles on it. Also makes a popping sound when the bike decelerates to a stop.
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