Roller Coasters that Break Down a lot?

What roller coasters have you heard of or know that break down a lot? We all hold those grudges as coaster enthusiasts.

For me, Dark Knight at SFGAm breaks down every time I get in line, and it always leads to horrible capacity. Also, Harry Potter and the Escape from Gringotts at Universal Studios Florida broke down a bunch while I was in line and also while I was on the ride

I'll pick the low hanging fruit here: Kingda Ka. Goes down at least once a day (it seems like) for various reasons.

Not a coaster but a high thrill ride that also breaks down a lot: Demon Drop.

Samurai and Slammer.

...

Pretty much every ride at Thorpe Park.

The Smiler broke down last year, and broke down a lot before the accident too. However Samurai and Slammer comes to mind.

Most North American Intamins

Anything launched

Most launched Intamins

Most B&M flying coasters

Giant Inverted Boomerangs

Anything with a rattle.

Heh-heh...I couldn't resist!

Use to TTD was down all the time... but it seems to have gotten a little more reliable on the past few years.

Most intamins.

I'll add Outlaw Run to my list. We have been at the park pretty much every other weekend, for the past 2 seasons. (This is the third season we will be there that much) and Outlaw Run is down at least twice each day we have been there.

Outlaw Run isn't down as much as it used to be, and when it does go down, it's usually back up relatively quickly. Powder Keg is the one that goes down all day, especially but not exclusively in the rain.

Another one that comes to mind: Vekoma Flying Dutchman models

When I was at Cedar Point, Top Thrill Dragster was down about half of the time. I had gotten in line and left three times, and didn't get to ride until my fourth try. It was worth the effort though since it's an amazing ride. Funny thing is, the other Intamins at the park were hardly down at all.

The only other kind of ride I experience a lot of downtime with are flying coasters (both B&M and Vekoma). I'd guess the process of moving the seats into and out of flying position throws a monkey wrench in the works.

Boulder Dash has unfortunately been down a lot lately; they've had all kinds of trouble with the lift hill motor, even after replacing it. I hoped this season would be better, but it went down opening day after a couple hours...not looking great.

Divertical was out of order for half of 2014, and it closed down twice when I went in 2012. Still managed to ride it. Decent.

I'll pick the low hanging fruit here: Kingda Ka. Goes down at least once a day (it seems like) for various reasons.

Have to agree with this and TTD. The first two times we visited SFGAdv after Ka was put in (twice in three years) it was down for the entire day. I finally got on during the third visit after the coaster had been in operation for like six years.

And given the fact that I have been to CP so much over the years, TTD seems to go down at least once during our visit. Maverick is another one that likes to get a little grumpy - especially during morning early entry.

Superman at SFMM was another one that was down all day during our first two visits.

'De Vliegende Hollander' at Efteling breaks down multiple times a day.

Intamin products

Even though it isn't a roller coaster, I heard that Rocket Rods at Disneyland had a lot of downtime.

R.I.P.

Rocket Rods

May 1998 - September 2000

People have said intamins and launches, but volcano specifically takes the cake. One roll back on that and it's down for the count, usually for the day. TDD is much better lately. Wind seems takes CP coasters down more than anything these days.

Not a coaster, but Justice League: BFM goes down about every 5 mins here at SFOT. Now they're replacing some control systems hoping that will solve the problem.

From an Aussie perspective, Green Lantern Coaster goes down fairly often. Superman Escape goes down too sometimes but it's usually up and running fairly quickly.

And really, any of the launched intamins in this country go down if it's raining.