Aloha,
I too have '93 Blaster, on my second year with it. It came to me with a Coffman Rocket Pipe, stock ride plate and intake grate, dual 44's/Proks, beat up Skat 14-17, chipped veins in the pump and Renthal MX bars and ODI Ruffian Grips.
For additional power:
Exhaust System: The Coffman pipe is a big mutha' but it had a nice rush and it got better with a few other mods. It also stays together well at the rubber coupling (until the bushings (4) wear out) Cost: Seen them on ebay as little as $125.00 in the winter.
Dry your pipe out more with a water bypass (easy cost effective fix to any pipe that needs it) Cost: $20.00 for fitting & hose
Increase your compression by milling the stock head or buy a simple after market hi-comp head Cost: Milling @ local machine shop probably $35-$50.00 AfterMarket: Head, O-rings & Gasket $120.00 on ebay
For addtional handling:
Turning: "D" cut the stock ride plate and do the mod under the steering column (good for doing 180's on the face of waves) Easy perfromance fix - no real cost.
Hook- Up: Get a good grate, the stock grate sucks and will suck more when you get more power. Prefer Jet Dynamics but I settled for the Riva due to the huge cost difference. Cost $50.00 +/-
Hook Up: Check your prop and the pump veins. Grind/file them smooth if they're beat up. Easy performance fix if required.
Hook Up: Get a new Prop...riders are swearing by the Hooker.
Rideability: Get a set of MX Bars made for a HONDA CR (low style) and locking grips (not the glue on). Cost: eBay
Rideability: Learn the left side deep water mounting procedure. Check YouTube.