Faults:

2nd gear goes out prematurely. When you're rebuilding the transmission, you'll have to replace both 2nd and 5th gear, since they're meshed together. Besides that gear issue, everything is great and reliable.

General Comments:

If you want to purchase this, make sure the 2nd gear is updated.

Comfy for a sports bike. Can do 7+ hours in a day. Bike is very heavy.

Faults:

Absolutely nothing has gone wrong with it yet. I got scared with it being my first bike that overheating was an issue, but found out that the radiator fan kicks in at around 110 degrees Celsius.

General Comments:

This was my first bike, so I have little to nothing to compare to this, plus I am writing this at 2 in the morning while intoxicated, so bear with me.

I LOVE my Thundercat. It almost keeps up with my friends modern 600cc's, plus it's 1000X more comfortable to sit on (which contrary to what I thought before, matters a lot).

It has also been quite reliable, even though I drive it every day and have put on 4000km in 3 months.

Faults:

Replaced the chain, brakes, and tires. When doing the chain, I noticed that it must have broken a chain at some point in its life, because it ripped right into the front sprocket cover and someone half assed it back on before I got it.

My biggest problem, which seems to be a unanimous complaint, is when riding in slow traffic or stop and go traffic, it really gets hot and doesn't like to sit still. I've tried everything I know of to get her to keep her cool, but the Thundercat wants to GO, GO, GO!!!! Then she calms right down to the quarter point on the temp gauge.

General Comments:

This is my daily commute and my only transportation. I live in Tijuana Mexico and I cross the busiest land port in the world every day. My daily round trip in miles is around 65 or 70. It was a 10 year newer upgrade from my 94 Ninja 600R, which is Kawasaki's version of this YZF. Much, much more power, and the top end blows away the Ninja. It handles like a dream in the twists, and did I mention it likes to GO, GO, GO! It's hard not to just twist open the throttle and let her rip from about 60 mph, and watch the tach shoot up to around 11 or 12 and hear her scream with an aftermarket pipe. Man it's a great bike overall.

It definitely isn't an R6, but will keep you much more comfortable and keeps a bit more cash in your pocket too. One good upgrade is to swap out the rear sprocket to something a bit bigger, and she will stand straight up for you quick. And then she launches like a rocket on the launch pad.

Definitely recommend this bike to anyone wanting a bit more comfort than what R's offer, who still wants to keep up through the twists.