The biggest and most important thing (besides oil change, making sure it's solid off the get go so there are no engine issues) is getting the suspension set up correctly for you. Not too much or too little sag for you at rider weight. I had to respring my bike front and rear for my weight, which I did myself only because the suspension was already fully gone through. Stock is good but aftermarket/ custom calving goes a long way. Suspension makes you ride better, have less fatigue, etc etc etc
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