Hi
This is the start of the scan thread. If anyone has the 2001 spring issue of american snowmobiler, let me know.
I start this thead with the 600 cc class in 1997, compared to Maxximum performance's sx 600. The article states that conditions were poor, and only got worse, and the Maxx perf sx is tested after the stock classes. Just look how little it took to be faster than the stock 600 sleds. They don't mentiton anything about the gearing on the maxx perf sled, so I assume it is stock, which is too high for this kind of competition.
This is the start of the scan thread. If anyone has the 2001 spring issue of american snowmobiler, let me know.
I start this thead with the 600 cc class in 1997, compared to Maxximum performance's sx 600. The article states that conditions were poor, and only got worse, and the Maxx perf sx is tested after the stock classes. Just look how little it took to be faster than the stock 600 sleds. They don't mentiton anything about the gearing on the maxx perf sled, so I assume it is stock, which is too high for this kind of competition.
Attachments
Don't hesitate if you have any requests, I have most shoot out results, except the 2001 and possibly 2002.
Cool stuff
In race trim, we would dyno 114 with this engine at Iantomassi track n'trail.
What's race trim?
Advance timing 4 degrees.
Remove air box and install K&N air filters.
Yamaha .6mm head gasket.
137.5 main jets(only suitable for short bursts).
What's race trim?
Advance timing 4 degrees.
Remove air box and install K&N air filters.
Yamaha .6mm head gasket.
137.5 main jets(only suitable for short bursts).
This sx had only a thin headgasket, clutch work and probably gearing. 114 is pretty sick. But this maxx sled was in trail trim.
Looking at the stock setup of the 1998 srx 600, it is quite obvious to me why the sled performed this bad. It must have overrevved badly. The pink-green-pink primary spring has an end force of no less than 139 kg. Also, the rate is 3kg/mm. That combined with a straight 45 helix, this is not loading the motor enough at all. The only thing in the right direction is the gearing, which is 23/39. It would not take much to make this sled perform way better, even with OEM parts only. I cannot find the 8df-00 weights in the tech pages, but the 99 srx 600 weights are 8df-10 which are only 37,84 grams, and add rivets to that, this is waay to light. The polaris xc 600 for comparison, had 10-58 weights, which are 58 grams, it also had a 50-34 multiangle helix!
Last edited:
