I have repaired one of those side covers before by tig welding it. A wire welder with aluminum spool would be a little easier bc its hard to get the cover clean enuf from oil to weld good. Those quads are notorious for the chains jumping off and causing damage. Even when there are good used ones on ebay they usually go for 90-100 dollars.
1995 Blaster. Bored .040" , midrange ported, head rechambered, pro series reeds, FMF fatty/Dg silencer, lightened flywheel, +4 timing, Hydro brakes, Lonestar +2 a-arms, Works dual rate G-series shocks, +2 swingarm,. More to come