i have a few upgrades for my sons 2008 sportsman 90 i would like to do…
installed some hid lights but they flicker – can’t find any info on this – there is not a light switch – might need a relay – need help with that

second – i would like some more aggressive tires for his 90 as well – any website and size that would work would be great

third – i would like to increase the performance of the wheeler as well

I’m new on here so any help would be great