Hello, just bought a new 21 950, what are the 1st upgrades I should do?  Exhaust? ECU tune? Fuel tuner? suspension upgrades?  thank  you for your advice.

[2015 Z Force 800 53/Trail EPS]

The 950s are pretty good just the way they are. However most upgrade the tires first, then suspension, then work on tuning. The exhaust will be a but more tricky as the options are limited. Better air filtration is always advised but I hear finding something that works without some modifications is a challenge. 

The first thing I did was tires and clutch kit.  Then I went straight to the suspension as it is very stiff. 

What tire upgrades do you recommend for the 950?