Yoo I saw that we both have a Thundercat but it’s my first bike and I have had it for almost 2 years now and can’t figure out the issue.. I sent it to a shop and have had “biker” friends look at it and even ride it to try and figure it out but nothing!! Ok so- It’s a 2004 YZF 600r with 21k miles, Starts and idles good I can leave to let it warm it. It seems to rev fine sometimes it’ll come back down slow sometimes at lower RPM’s.. but the real issue is it’ll go and ride 1st gear no issue doesn’t even seem underpowered but if I try to go past 40mph - 50mph in 3 it’ll die out and I’m 2nd it’s the same thing but around 8k RPM, I’ve replaced the Fuel pump, Fuel filter, New plugs, Fresh gas, checked the air box and air ways, I’ve even sent it to a shop they ended up just working on suspension and brakes all that junk.. by any chance do you have an actual idea of what it could be 🙏🏻
