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  1. REV-XP / XM Chassis - Mountain Sleds
    Bought a 2008 summit 800r with low compression for a good deal. Doing top end and would like to know what you guys think caused the piston to go. Checked out a few charts and can’t tell if it’s lack of lubrications or overheating. Would be nice to know to prevent new pistons and newly plated...
  2. REV-XP/XS Chassis: Renegades/Freeride/Backcountry
    Well here I sit broken hearted, engine blown, can't be started. Sled is a 2016 Renegade Adrenaline 800 ETEC, ~3,200 miles. Had about 1,000 miles on the season so far and ended last weekend with this. Was running good and strong all season. Riding in northern Wisconsin that day was probably in...
  3. REV Chassis - Performance and Trail Models
    Looking for some help guys, Just rebuilt top and bottom end of my 04 mxz 600HO sdi after 12,000 kms on the clock. Got a MCB Performance kit comes with everything crank, pistons etc... fired up the rebuilt engine today runs perfect, let it run for about 30 mins then figured I would pull the plugs...
  4. REV Chassis - Mountain Sleds
    ok so I'm doing a top end job on a 06 summit 800 bought the kit to do it and got the wiseco piston kit... did some research after the fact and saw mix opinions on this pistons... now I'm thinking about selling them and getting SPIs...... Is the hassle worth it of me trying to sell this and buy...
  5. Sledding - General Discussion
    What happened... This is the exhaust side of the piston.
  6. Vintage Classifieds
    I have a 1979 Blizzard RV looking for piston rings. Cannot seem to find any aftermarket. Anyone know where I can find them? Thank you.
  7. Vintage Ski Doo's
    I'm doing a restoration on an oly 12/3 and need to replace piston rings as there is a bit of play in the cylinder. I figure I may as well replace the piston at this point as well. Bearings and cylinder walls all appear to be in great shape. I'm just having a hard time finding a piston and ring...
  8. REV-XP/XS Chassis: Perf. Trail 120-129 Inch Models
    Was riding my 2011 XRS 800r ETEC up north this past weekend, and it was running great until I hit a straight away on the trail. It has 23/45 gearing and bigger drivers so Im sure the RPMs were sorta high. Was doing about 75 or so on this straight away clearing for a decent amount of time, maybe...
  9. Sled Parts For Sale or Trade
    Random sled parts that I just want to get rid of....no reasonable offer will be refused!!! Buyer pays shipping in the lower U.S. only!!!! *all parts are from rev chassis* -1 x 800 ho ported cylinder in good shape, no scratches or gouges cast number 613852 $200 now 175 -1 x 800 ho...
  10. Vintage Ski Doo's
    I have a 1977 Olympic 300 twin that works great, but after a good run last winter, I went to get it ready for this year, but she might of ran too lean last year and now have a hole through the left piston. she fires right up, but not moving once there is a load on it. I am not familiar with...
  11. REV-XP / XM Chassis - Mountain Sleds
    Pulled the Y-Pipe off my 09 Summit 800R and took a look at the pistons. MAG side looked real good but PTO side not so much. How bad is this? MAG: PTO: Looks like there could be some carbon/sludge there that I should've tried to wipe off, or is this somewhat typical? Thanks for the...
  12. Sledding - General Discussion
    Regarding the oiling holes on the snow x rods, which everyone says are so great, has anyone ever drilled small oiling holes in the stock rods? I was thinking about drilling a small hole in the top of my rod, for the top end bearing. Any pros and cons?
  13. REV-XP/XS Chassis: Perf. Trail 120-129 Inch Models
    Ok so im new to this forum but this weekend i had my sled seize up and i want to know why it happened so that hopefully i can prevent it for next time. So this is what i know: I was cruising along mid-high range RPM across a lake and the sled totally died, no bogging down or loss of power just...
  14. MXZ / Legend / Summit / Grand Touring / Formula
    Hello, First time posting, brand new to the forum. Got a question regarding piston size, and recommended replacements. Been helping a buddy teardown the topend on his (I think 97 MXZ). The rings on the one piston are toast, we need to replace the pistons. Problem is its got a 470 rotax in...
  15. MXZX Race Sleds
    anyone out there running rk techs dual ring pistons? or have any advice on what pistons to run in my 600 rs that just had a melt down for the third time!!!
  16. MXZ / Legend / Summit / Grand Touring / Formula
    ok so i have done everything to diagnose other than tear my engine back apart. i got some good piston slap. really noticeable at idle. engine hardware seemed real solid when i put it back together. if i dont put a new top end in it what are the consequences.
  17. MXZ / Legend / Summit / Grand Touring / Formula
    Hi Guys, Newbie to the forum but here goes. Trying to figure out what happened so it wont happen again - in the near future anyway! ;) Purchased 2007 MXZ XRS early march put 500 miles with no issues other than the odd backfire and slow to start when engine at operating temps. Engine was...
  18. MXZ / Legend / Summit / Grand Touring / Formula
    Hey guys, new to the forum and just purchased my first skidoo. Mxz 800. After I got it home and had it idling I wasn't sure if there was a rattle in the motor or coming from the clutch. After rotating and rocking the primary side to side and hearing a small knock inside the motor, I removed the...
  19. MXZ / Legend / Summit / Grand Touring / Formula
    Hey guys, new to the forum and just purchased my first skidoo. Mxz 800. After I got it home and had it idling I wasn't sure if there was a rattle in the motor or coming from the clutch. After rotating and rocking the primary side to side and hearing a small knock inside the motor, I removed the...
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