Modern Vespa

Anyone have one. Looking at the rotor on the Gts it doesn't look like one will fit.

There are as many different disc locks as there are discs. I would worry about forgetting its on there and taking a very short ride.

I have one works great for me.....
One word of advice... Most come with a high viz lanyard. You attach it to your handle bars. USE IT!!!! It is there to remind you that your disc is locked. I saw a friend whom forget that he had his on... it wasn't pretty when he tried to take off.

I use this one. Like Jimmy says, it comes with a bright orange lanyard that you loop over your handlebar. You'll remember to remove it as long as you use the lanyard, and after awhile it'll become second nature to remove it even without the lanyard, in case some jerk comes and takes the lanyard off the handlebar.

Per prior post, there are many.

You could look into the Xena which has the ability to affix to disc or you can get a cable attachment.

http://www.xenasecurity.com/home/current/lock_us/

I used one for about a week until I got tired of trying to ride off with it still locked in place (yes, I'm that stupid!).

Thank heaven, I'm not the only one who did that. I had the alarmed disc lock and fortunately the alarm would go off before I could do any damage, but it scared the crap out of me every time.

I have a Xena with the reminder cable. I also use a Grip Lock that keeps the cable in place.

I used a disk lock on my beemer GS, for about two weeks. Thats how long it took me to forget I used a disk lock, and dump it in the driveway. I sort of rode the bike down slow motion, trying in vain to hold it up. Managed not to damage anything but my pride. If you must use one, use the lanyard to remind you it's there.

Xena has both a cable reminder and a cable attachment that can be used to cable secure your scoot.

http://www.xenasecurity.com/product/accessory/main/CableAdaptorCombo/page1/

I have a Xena too, the version with the alarm. I do use a Lanyard/cable to remind me it's there. The bright orange coil also acts as a deterrent against theft and from random fools from sitting on your scoot.

http://www.revzilla.com/motorcycle/xena-xx-6-disc-lock?utm_source=product&kwd=&adtype=pla&kw={keyword}&gclid=CIWjlbOQ6LcCFYyY4AodgBEAfg