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  1. REV-XP/XS Chassis: Renegades/Freeride/Backcountry
    Was out riding this past weekend when my '13 Backcountry 800 which had a CV tech short block installed about 14 months ago, lost power instantaneously and threw a knock code. I've been down this road before so I pulled the spark plug to find it bent out of shape severely. We towed it home and...
  2. REV-GEN 4: MXZ Perf. Trail 129/ Renegade 137
    2020 Renegade, 600R getting a CEL for RAVE system, don't know the code it's my Father in Laws sled. Hes up riding in the UP. The question is, has anyone had any similar issues with the RAVE system setting a code, he stated a change in exhuast note when light comes on and a loss in power. Your...
  3. MXZ / Legend / Summit / Grand Touring / Formula
    Having trouble finding the year this 670 Rotax is. Has a bar code ID on it and the recoil is on the outside, so it's 95+. I'm thinking this is out of a 96 MXZ 670, can anyone confirm? Just the engine, this rotax was swapped into another chassis. There is a D stamped on the head. The bar...
  4. REV-XP/XS Chassis: Perf. Trail 120-129 Inch Models
    would like to know if somebody found a way to make thoses exhaust valves open sooner in powerband ... to bring the last step (full;y open) down in rpm she d like some more flow around 6000-6500 rpm thanks to share ( i can trade again 800rs builts ;)
  5. Vintage Ski Doo's
    Hey all, I bought my first ski doo the other day and it's in really great shape for bein 25 years old now. Unfortunately since the day I bought it I've been having an issue where it won't rev past 6000 rpm. Sometimes it will rev up quickly and go to full rpm (7000+) but more often than not it...
  6. MXZ / Legend / Summit / Grand Touring / Formula
    I have what I believe is a 1999 mxz 500. I've done some research and am 99.9% sure it is a 494 l/c engine with the rave exhaust. I don't see any 1999 mxz 500s on Craigslist or read about them on hear and am just wondering why that is? It's always been a solid engine with only 2000 mi.
  7. MXZ / Legend / Summit / Grand Touring / Formula
    I'm new and interested in what people have to say and am wilLing to listen. I have had a 1999 MXZ 500 with the 494 L/C Rotax engine and am having a problem with getting if to fire off. I have cleaned the carbs which were not bad and took apart the exhaust valves and cleaned the carbon off of...
  8. Vintage Ski Doo's
    What I am wondering is has anyone done a R.A.V.E. Valve mod on a 503 Rotax? Has it been done? I know that anything can potentially be done if you have the time, money, and resources, but that's not what I'm wondering. I'm already going to do a reed valve induction modification, and considering a...
  9. REV-XP / XM Chassis - Mountain Sleds
    Hi! I have problems with an error code on my Summit 2014 etec turbo. Error code P1477, RAVE Not Reached closed position. The nut that holds the rave position sensor had fallen off on one of the valves and loosened on the other. But the error code was still there, when I had screwed them back...
  10. REV-XP / XM Chassis - Mountain Sleds
    When go off trail sometimes with the gas wide open, sometimes the rpm drops from 8100 to 6600 for a few seconds then come right back up. At first I thought it was snow on the air filters but it dosent seem to always be the case. I dident noticed it last year. This year I added an slp full...
  11. REV Chassis - Performance and Trail Models
    I'm in the early stages of my 700HO build and i'm wondering about the interchangeability of the RAVE valves on the 700 cylinders. The top end I have is an '02 and the RAVE valves I'm looking to purchase would be off an '03. Doo parts numbers are different for both, would they still work?
  12. REV-XP / XM Chassis - Mountain Sleds
    I have a 09 Summit 600 HO E-TEC with almost 5000 miles on it. The past few rides I have taken it on, it has been loosing power after lunch. At first, it feels like it is running on one cylinder. Then it progresses to get bad enough to actually kill the engine. If I shut it down and let it sit...
  13. MXZ / Legend / Summit / Grand Touring / Formula
    I was wondering how a 94 ski doo formula stx 583 rave is in the powder. Also I would like 5o know if risers and straight bars are a good investment. Thanks
  14. Vintage Ski Doo's
    so as some of you might now I just finished getting my engine back in yesterday after a clutch disaster. well I had it out for about an hour today and everything was running great, clutch was working fine didn't have any problems. was almost home at the end of my street and it quit, I think it...
  15. Vintage Ski Doo's
    so heres my story, first part is whats been going on the last few weeks and what I did yesterday, second part is what ive done today. so here we go (note everything you read until I state otherwise was done yesterday) my 89 mach 1 583 rave has been running good lately. about three weeks ago i...
  16. MXZ / Legend / Summit / Grand Touring / Formula
    I recently have cleaned my rave valves but when I cleaned them I polished them to a mirror finish will this improve on anything
  17. MXZ / Legend / Summit / Grand Touring / Formula
    ok so where do you guys have your rave valves at? my red adjuster screw or whatever it is is all the way in basically, i just pressed on the valve and its pretty hard to push up outs the exhaust. AND THERE NOT DIRTY FYI. what kind of performance differences are there between all the way in...
  18. MXZ / Legend / Summit / Grand Touring / Formula
    Good Morning to all and we have snow at high altitudes :biggrin_old: ok my question/s I have a 2001 summit 800X and on the last trip last season the rod bearing gave up, I have a reman 800 HO long block for her just picked up from Felkers in Loveland. had to pry one of the RAVE valves out of...
  19. REV-XP/XS Chassis: Renegades/Freeride/Backcountry
    Yesterday, about a mile from home my sled died. Started looking into it today, and it seems only one cylinder is firing. Sled barely stays running and it dosent even produce enough RPM to engage the tach. The cylinder that is not firing had a bad plug, and the other was ok...but I changed them...
  20. REV-XP / XM Chassis - Mountain Sleds
    So here's the deal so far. Check engine light pops on right as I get to 6000 rpms, took the sled to the shop, they pulled code for rave solenoid short or ground. I still have full rpms when riding, no performance loss. They checked all the wires and none had a bad connection, short, or ground...
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