Hello!

I just recently purchased an 01 LT80. I’ve noticed that it doesn’t seem to really have much for top end. As you ride the bike it seems that from a stand still the bike takes off great. Then as you get into the top end of RPM, it seems to sputter and feels like it hits a “rev limiter” in some sort. I’ve read about the carb being restricted. There’s no brass ring. I’ve also read about there being a “washer” in the exhaust. I removed the exhaust and didn’t really see anything that would point to there being a washer inside the exhaust. I was told it has recently had a top end done by a reputable bike shop close to me. Any help would be GREATLY appreciated! Thanks!!

 

Exhausts can block up with carbon, or a small piece of dirt could be restricting the main jet. Also possible someone has been "messing" with the carb, altering float height or main jet etc.

 

Prolly a plugged main jet. Check that out and we'll go from there.

 

I forgot to add. The guy I had bought it from said that there was a brand new carb installed on the bike. I can pull it off and clean it out anyways. And the other thing is there any way to tell if the exhaust is blocked off? When you start it you can feel good amount of flow through the exhaust

 

Not sure if this gives any other ideas but this is a video of how it sounds

 

A new carb doesn't mean something didn't get in. Example: the tube on the right, that's the carb vent. I see it's pointing down. It is supposed to be run up under the hood. I don't know where it is going now, but that may well have how got dirt in. Also, in the pic you can see that the rubber piece/clamp that connects to the carb isn't 100% in the correct position.
Curious, have you done clutch maintenance?

 

this is going to sound terrible. But I’ve only owned it for 4 days! Haven’t really wanted to go much farther then taking the carb off if it’s something bad.im going to pull the carb tomorrow morning and clean it out. HOPEFUL that this will be the issue

 

Cleaned out the carb this morning. Main jet was clean as a whistle. And the other jet had something small in it. Blew it out and reinstalled. Same exact problem. It’s got no ***** on the start. Then as it gets going it seems like it hits a rev limiter. I’m wondering if it’s running out of fuel cause it starts smoking as it hits this “rev limiter” ...very confused.. not sure if I should just return it to the seller haha

 

OK, back to the compression test.
I think the clutch's need maintenanced too. This is some of the star of trouble IMO.