Timing on 06 yamaha yfz 450

Question edited for full 'year make model (what it is).
Question moved from motorcycles to make model category.
Please don't type in all CAPS, it is considered SHOUTING and is harder to read.

'clips' and 'turns' it took me a while to realise you were talking about the carburetor and you were playing with the mixture screw and needle position! 4 turns out is a lot different to the factory setting which is 1 1/2 turns out.

If it is overheating it is running too lean. As you changed the stator, also consider the ignition timing. Popping can also be caused by the ignition failing under load, coil, lead and spark plug.

Carburetor and tuning.

https://www.google.com/search?q=2004+yamaha+yfz+450+carburetor+adjustment

This carb has a LOT of jets!

https://www.amazon.ca/Carburetor-Rebuild-Yamaha-YFZ450-2004-2009/dp/B07JNYP667

....

There is not really enough info in your post to narrow down the problem. Hesitation during acceleration can either be fuel related or ignition timing related. Once up to speed, will it maintain that speed smoothly?

If you have a timing light, check the timing at idle. If it is OK, then it is probably fuel related.

Assuming you have not messed with the ignition timing, if it idles, but won't accelerate, it is probably starved for fuel. 1.Check/change the fuel filter- easy and cheap
2. pull the fuel line off the carb, and make sure fuel flows from the tank freely.
3. If there is good fuel flow to the carbs, pull the carbs and clean them.

how to time a rhino 450

Turn the idle screw anticlockwise half to one turn to set if this does not affect idle speed then you need to look further inside carbi or intake valves for other issues

You need to remove the valve cover and rotate the crank shaft to TDC then with a feeler gauge you check the clearance between the cam lobe and lifter bucket. There are 3 on intake cam and 2 on the exhaust. The clearance will most likely tighten as the valve seats and valve wear in. If the valve clearance gets too tight they will hang open and not seal for proper combustion. Valve clearance for my 2002 YZ426 are intake=0.10-0.15 mm (0.0039-0.0059 in) exhaust=0.20-0.25 mm (0.0079-0.0098 in) the 450 should be the same or very close

im unsure but arent they on the sterering stem on a metal stamp or perhaps under the gear shifter I am unsure