My Piaggio is having a hard time starting when the engine is hot, starts first time perfectly every day, if engine is hot and running and I stop and then immediately re-start it will fire up, but not after it's been sitting awhile, like while eating lunch or shopping in a store or even sitting in front of my house for an hour or two will be it be hard to start. Giving it a lot of gas in this situation is the only way can get it to fire and sometimes I have to crank it quite a bit and give it a lot of gas before I am able to do so, several cranks for several seconds while opening throttle a good ways. I'm worried I will wear out the battery/starter or it will eventually fail to start completely and I will end up getting stuck somewhere.
Some videos I watched got me thinking it might be the evap collection system, maybe it needs to be removed? Or possible vapor lock? Fuel delivery system issue? seems to have started doing this when Summer kicked in, daytime highs here average low to mid 90s all summer long and routinely get up to 100+. I also did have the muffler removed when I got the back tire changed right before it started doing this, and it does seem to be making a slight 'backfire sound' after a hot start, I'm not sure if this was there before or not.
Any ideas? Thanks
Last edited by CaliScooterGuy on Tue Jul 27, 2021 1:47 pm; edited 2 times in total
Sergeant at Arms
Weird 80's Vespas & Cool Vintage Lambrettas
Joined: 21 Oct 2005
Location: The state of insanity, SoCal
Pull the evap line from the carb. You don’t need to eliminate the whole system.
How hard is that? never done it before.
Check and adjust your valves.
Last edited by CaliScooterGuy on Tue Jul 27, 2021 2:05 pm; edited 1 time in total
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: 26 Aug 2007
Location: Pleasant Hill, CA
Joined: 04 Feb 2013
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