Anyone that has done this what do they think? I love my 600 just want a little more hp.
660 kit on 08 rmk
- Thread starter Speedygibby10
- Start date
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volcano buster
Well-known member
It'll do it.
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X2Freeride
Well-known member
Zero Down side to a 660. Pull and go reliable with more Hp.
The 660 is an awesome set-up.
I don't think you would disappointed at all, it should be a sweet setup for that sled.
over 5000 trouble free miles on my wifes 02 rmk Built but Hot To Go Racing and my full mod 660 has 6 race seasons as a watercross machine w/ 0 issues. Larry Rugland built .Dyno sheets says 169 hp. Both engines are 2001 models
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volcano buster
Well-known member
Didn't realize 660's were capable of that kind of number. Impressive.
I have a 685 and love the dang thing. I originally bought it as a back up but found myself riding it more and more. Only problem I had was with the bigger bore I did break a cylinder skirt last season but I rebuilt it right back like it was.
Only real complaint it pulls hard but just cant pull with a good 800 but dang close!
Only real complaint it pulls hard but just cant pull with a good 800 but dang close!
Greetings Rotalaris,
What elevation was the 660 dynoed at?
Are you pushing race gas through your 660?
Thanks in advance.
Craig.
Craig that is a low alt racing setup. Remember peeps most of the 660-685 kits are referred to as improved. Means you run a stock cylinder that has been bored to except the 700cc stock size piston. It also means you get someone's porting design, coordinated with spark, and normally some kind of a custom head setup with compression depending on what alt your looking for and what type of fuel you want to use. Most of the various kits on the market will build a single pipe pump gas 134hp-140ish hp depending on who is controlling the dyno setup.
169 is a twin pipe race gas version with high compression on a full race port setup...and is about the ceiling of what you can produce with a twin cyl 600 to 700 cc two stroke naturally aspirated engine.
169 is a twin pipe race gas version with high compression on a full race port setup...and is about the ceiling of what you can produce with a twin cyl 600 to 700 cc two stroke naturally aspirated engine.
Carl's in Boise Idaho 208-853-5550 (Chris in Performance) has running high performance CFI setups for the Polaris 600 to 660. They've even put one in a PRO chassis that ran great and handled BETTER.
You cannot go wrong with Carl's for a mtn setup big bore kit on a Polaris. They've been doing them a long long time and are universally an excellent product with extensive testing and professional support.
You cannot go wrong with Carl's for a mtn setup big bore kit on a Polaris. They've been doing them a long long time and are universally an excellent product with extensive testing and professional support.
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^^^ x2
I had Carls build a 660 kit for my 2012 RMK 600. Also had their kit on my '07 RMK as well and it's the best pull-n-go mod I've done on my sleds.
I should be getting the top end from Carls tomorrow in the mail
Now we just need snow.