"This just seems to be one event that I always stuff up," said the 27-year-old Smith.
"I fried my clutch one year because I was riding too aggressively and, on another occasion, I ran out of gas.
"Hopefully I've learned some lessons from those mistakes and this year I can finally win it.
"The Tarawera 100 tends to be a race that favours the big bikes. It will be tough being up against the big 450cc bikes but my 250cc bike is still a very fast machine."
Smith will take his Blackwood BikesportNZ.com Yamaha YZ250 into battle against some of the best dirt bike exponents that New Zealand has to offer, including former world motocross champion Ben Townley (Honda CRF450), and current national MX2 motocross No5 Peter Broxholme (Honda CRF450), both these men from Tauranga.
"A lot of motocross guys enter the Tarawera 100 and those guys are definitely not slow. I know that Ben Townley, Peter Broxholme and cross-country nationals rival Jason Dickey [of Raglan, Kawasaki KX250F] will be fast but, if I have them in sight near the end, then I have a great chance."
Smith will also need to keep an eye out for a challenge from cross-country championships rival Ethan Bruce, the Nelson rider also campaigning a Yamaha YZ250.
"I have never raced the Tarawera 100," said Bruce. "It's an iconic event and I've always wanted to do it. I'm a bit nervous but looking forward to the race."