Quote:
Originally Posted by DSengineer
Your comparing apples to oranges. Your 1000cc street bike motor is probably turning 3x the rear wheel HP of a stock Rotax motor.
All chains will have some amount of stretch when they break-in. There are plenty of good quality 530 chains out there that are just as stong as a 530 when used on a DS. Every sport quad on the market (including the Raptor 700) uses a 520. In my opinion the 530 is complete overkill on the DS. It makes sense to go to a 520 setup if your going to be replacing chain and sprockets anyways. The saving in "rotating" mass, not dead mass is pretty significant and will free up a couple of HP and let the motor rev quicker. I have run a 520 DID X-ring, Rocky Mountain front steel, and PBI rear aluminum on my HPR cam/piston stock bore and had no significant stretch after break-in or signs of significant sprocket wear after 2.5yr of use.
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Hmm... okay. I guess I'm just used to HAVING to go with the overkill option because of my size. (I'm 6'5, 300+ pounds).
But this is the kind of stuff I need to learn. whether or not my extra weight will stretch out the 520 chain easier than a 530.
I'm pretty sure Bombardier decided to go with the 530 chains because the DS650s weigh so much more than any other sport bike, and they didn't want the chain to be an issue. Just my 2 cents.
Where did you find a front sprocket on Rocky Mountain ATV for the DS that fits a 520 chain? The only ones I can find are mirrored to the OEM.