2017 txt gearbox noise

[SamAs]

Hi all, Ive recently got a 2017 txt racing 300 and it’s making a noise in the gearbox. There is a ticking noise that im assuming is the chain as it does this in time with the master link. But once I shift into 4th gear the box starts to whine like crazy. I know theyre straight cut gears but it sounds like a race car, it’s almost louder than the engine. I’ve been told that it’s a case of possibly bearings or something in the box but seen on an older post on here that the whine is “somewhat normal”

im just trying to figure out if I need to take the engine out or not as I’ve never done it before and dont want to do it if I don’t have to. But I want to do as much as I can myself to save money as the bike cost me a lot. 
 

thanks in advance for any help, I might end up taking it out soon anyway it’s just a bit daunting 

[RonH]

SamAs, I don’t think I’ll be much help to you but I have a 23 TXT 250 that does NOT whine when shifting to 4th. I think the engines are nearly the same as the 2017 but I could be wrong. I’m no mechanic and there are others on here that will have better judgement than I, but I simply wanted to let you know that in my experience, on my bike, there is no whine shifting to 4th. If there was I would be worried. So far, working on my own bike, I’ve found it’s simpler than I ever imagined to do it myself. If you’re mechanically inclined and have common sense, I’d say go for it on your own. Just review and follow what you find in the maintenance manual if you have it. I’m all about saving cash too. Good luck!

you can download the 2018 manual for free here: https://drive.google.com/drive/folders/1xOzbrZQDO_W_AxpjvHU1xJMOqfRsVfPJ

Edited 3 hours ago by RonH