I see it has a red secondary spring, which to my liking is a little soft. It's hard to say accurate as there are so many variables, but with the stock weights I imagine a 47/43 or a 47/41. And a green secondary spring at 60 or 70 deg. If it still overrevs, you can swap the primary rollers to a smaller size. My SX has Hauck adjustable weights and that really made the tuning easy, you will not believe how much they weigh, 61,3 grams with the hardware, and I have a 39 deg straight helix in the secondary, I found that helix can be used with or without the roller. The weights on that deluxe are alot lighter, hence the more agressive helix. You hould inspect the weights and rollers for wear, because they wear out rather fast. Depending on your budget, a tempaflow really wakes up the sled in the low and midrange because it leans out some. Also, a rear heat exchanger on the venture 500 did wonders for performance, it also really helps keep the motor cool when going real slow. I am going to move from heelclickers on that sled to Hauck X weights and a 39 helix or a 39/41 reverse angle helix (dalton). Back to your deluxe, factory gearing seems ok, check the lug height, if it's the stock track the gearing is fine. However, inspect the track, it is som 22 years old, it can delaminate, happened to my 97 sx 600. Whatever track it has, being fully clipped helps the mileage some and hyfax wear. I really like duponts in my sleds, they make them just plain faster. If all my mods were done on that sled, hauck weights, helix, springs, dupont slides and tempaflow, I would Image it could do like 95 gps on radar at least, depending on the track. Post some pics of it, especially the clutches and the track.