Modern Vespa

My 2010 gts 300 is idling way too high and I'm not sure what to do. At a stop, I have to squeeze on the brakes to keep it still and it vibrates. I doubt this is good for it.

I checked to see if the cable was restricted, but it seems fine.

Does anyone have any ideas.

thanks.

So I looked at the throttle cable again......

It seems that there is a second cable that is broken. Why is there two? Is this something I can fix by myself, or is it a shop fix?

It's a "push-pull" throttle. How handy are you?

I fix everything myself. When I say "fix", I mean severely break something 40 percent of the time. I do have plenty of tools and can-do spirit.

I've never done it myself, but Haynes suggests the glove box and floorboard have to come off.

There's quite a bit of dismantling and 're-mantling' to do, but it's all straightforward.

Best to replace both cables at the same time - and ensure the new ones are greased up properly to prevent the corrosion that causes them to fail.

Does anyone know where you buy a throttle cable for a gts?

I have tried scooterwest, scooterworks, ebay and a bunch of other places with no luck.

Try 'phoning Scooterwest.

According to the parts list, you want part numbers:
650639 'open gas control transmission'
648076 'close gas control transmission'

Those are some expensive cables.

Go to your local. They can order from vespa and you dont have to pay shipping and its going to be a little cheaper.

thanks for the help anyone.

i bought a cheap cable and fed it through the housing and then attempted to solder the end on with no luck ( silverbrite pipe solder does not stick).

i broke down and called scooterwest and they did have the cable ($74). it went in easy and seems to work perfectly.

the vespa still idles a bit high and it doesnt seem to have anything to do with the throttle cables, but i think its ok.

thanks

Glad you got it fixed. Always call the guys at ScooterWest. They have so much more in stock and than what's on their web page.

What is your idle rpm?

my vespa does not have a tachometer and im not sure how to determine the rpm's without one.

it is definitely faster than it should be, so i might pull out the the clutch to see if something is sticking.

Multimeter with frequency?

http://www.wheelhorseforum.com/topic/38679-how-to-measure-rpms-with-a-multimeter/

thanks for the link about the multimeter, im gonna borrow one this weekend.

i pulled out the clutch and variator to see if anything looked funny. i had noticed before that two of the pads on the clutch travel further than the third. i looked more closely and it seem that two of the springs carry no tension when the shoe is in the closed position. could this be the reason that my vespa wants to move when idling? if so, is it possible to replace those springs?

as it turns out, the old clutch springs were junk. it took me 3 weeks to get them from scooterpartsco.com, so I finally fixed it and it works like a dream.

by the way, I couldn't find someone with a multimeter that tested hertz, so I couldn't check the idle speed. I think it's fine though and I was just being an idiot for assuming that was the issue.

thanks everyone

Awesome, good outcome. I had a feeling high idle wasn't the issue.

How many miles?

I think I'm at about 34,000 miles. The spedometer odometer went out a couple of years ago (at 15,500 miles) and I don't think I need it, so I haven't fixed it.