Welcome to the forums 
If only things were that simple eh! Lol. It is in fact a case of dropping the oil and removing the side case, removal isn’t tricky at all. The tricky bit it installing the case and pieceing together the clutch adjuster.
How would you best describe your mechanical ability? Have you built a top end before or a complete novice?
You can download the service manual from this forum under the sub section ‘schematics and manual help’, in there you’ll find how to remove and install the side case. Maybe have a look before digging into it.
A quick tip if you attempt it.....
After draining the oil jack up the right side of your 300, i found things easier as the side case slid back into place when refitting. It stopped the clutch adjustment shaft dropping down at an angle.
Also, when disassembling, put a white sheet or something similar underneath to catch any parts that may fall as you remove the side case.
Any issues, drop back here and we’ll do our best to help
If only things were that simple eh! Lol. It is in fact a case of dropping the oil and removing the side case, removal isn’t tricky at all. The tricky bit it installing the case and pieceing together the clutch adjuster.
How would you best describe your mechanical ability? Have you built a top end before or a complete novice?
You can download the service manual from this forum under the sub section ‘schematics and manual help’, in there you’ll find how to remove and install the side case. Maybe have a look before digging into it.
A quick tip if you attempt it.....
After draining the oil jack up the right side of your 300, i found things easier as the side case slid back into place when refitting. It stopped the clutch adjustment shaft dropping down at an angle.
Also, when disassembling, put a white sheet or something similar underneath to catch any parts that may fall as you remove the side case.
Any issues, drop back here and we’ll do our best to help