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  1. REV-GEN 4 & 5- Summit/Freeride/ 850 Turbo
    What to do for 850 topendWhat'd you pick?MCB Forged for $460216.67%OEM for $5501083.33%Rings and gaskets for $17000.00%
  2. REV-GEN 4 & 5 MXZ Perf. Trail 129/ Renegade 137
    Looking for feedback on what people have used when putting fresh slugs into an 850. Being stuck at home and not sledding this week has me thinking doing some PM. Wiseco has always been my go-to, I prefer a forged slug, but MCB makes a nice looking forged dual ring piston, and then BRP factory...
  3. Vintage Classifieds
    I am looking for a pair of cylinders that are still within STD piston spec. The Cyl's I have are just a little too worn out to use with my brand new STD pistons. Trying to keep it a TNT engine instead of using alpine parts. If this doesn't pan out, then I am interested in oversized pistons to...
  4. REV Chassis - Performance and Trail Models
    Hello All!! Time to start working on the sleds!! I have two 2005 500ss sleds that I've owned for a while now. Love them. Both ate their second sets of pistons at the end of last year (blew top ends on last trip of season). Each engine has around 14,000 miles on the crankshafts. Cranks are...
  5. Vintage Ski Doo's
    Having a hard time finding pistons for my twin 300. I can find the gasket sets every where, so some one has to be making them, right? Thanks, Matt
  6. REV-XP/XS Chassis: Perf. Trail 120-129 Inch Models
    Hey guys, I was just wondering what everyone uses/recommends for a set of pistions in an 800 etec. I just bought my Dad's old sled as he's getting an 850, but the sled has 14000km on the sled and the motor is untouched. I figured I should probably do a top end rebuild to get me through the...
  7. REV-XP/XS Chassis: Renegades/Freeride/Backcountry
    I tore my 2009 600 Etec apart again after doing a complete rebuild last season (top and bottom end) because of a meltdown. Only put about 300 miles on it since the rebuild. when I pulled the top end apart last week the Pistons looked not so good. I went with wiseco forged pistons and I am...
  8. Vintage Ski Doo's
    Would you like to see more New Replacement Cranks, & Rod Kits, Pistons, etc., for these older engines? If you do, then we all need to start a campaign of e-mailing, writing, or calling, some of these different Part Manufactures with these Type of Parts you need, what we all would like to have...
  9. REV-XP / XM Chassis - Mountain Sleds
    New here, have been reading about snow x parts on other threads, curious if they are available in Canada? Would like to purchase for my ptek but not interested in having shipped from the States (duties etc). Thanks.
  10. Sledding - General Discussion
    Some interesting info to read on Compression Ratios. http://www.macdizzy.com/update4.html Compression Ratio Take a look at the chart I wrote at http://www.macdizzy.com/compress.htm It should answer a lot of questions you have about compression. When taking altitude into account one must use...
  11. Vintage Ski Doo's
    My father-in-law has a 1974 Ski-Doo TNT 340 type 346, std bore, it has 0.012" piston to cylinder wall clearance, it should be 0.0039"-0.0045" with a maximum of 0.0092". The cylinders are sleeved, did they come from the factory sleeved? A professional engine builder said the cylinders were chrome...
  12. REV-XP/XS Chassis: Renegades/Freeride/Backcountry
    Hi Everyone, This is litterally my 1st post, great site BTW and most of the info for my rebuild i found on here. This time I'm a lost, i very mechanically inclined but its my first sled rebuild... enjoying it just need a bit of extra knowledge from the gurus on this forum:) My 800r engine...
  13. REV Chassis - Performance and Trail Models
    MCB Performance will be attending the 2014 Toronto International Snow Show. Look for us in the main hall, against the wall with the MCB feather banners. We would like to have orders pre-packaged for anyone wanting to do so. Email quotes to [email protected] We will be bringing the...
  14. REV-XP/XS Chassis: Perf. Trail 120-129 Inch Models
    RK Tek was the first to recognize the the need for a dual ring piston in the engine. Since then we have designed a custom piston line and offered these custom pistons to the public that allow their engine to run much stronger and longer than the OEM single ring piston design. This piston line...
  15. Mach Z / Mach 1 / Formula III Triples
    Crankshop told me to use piston part #9767m07200 uses kimpex ring r09-741 .does anyone know if any other pistons/brands or oem can fit with this bore kit. the part number they gave is supposed to be proprietary only to crankshop . I bought a used 750 kit from them and it came without pistons and...
  16. Vintage Ski Doo's
    I have a type 454 rotax, blew one side, bunch of scoring, 30psi compression, going to bore the cyl out and put in new piston and ring. It is already done .010 over, so where can I find .020 oversized pistons and rings? Thx
  17. REV Chassis - Performance and Trail Models
    Engine blew last week at ~3800 miles and I need some part numbers for the rebuild :sad_old: -piston w/rings (what brand do you recommend?) -gasket kit -size 20 pilot jets -370 mains -starter Also, how do you get the crankcase open? I have all of the bolts out, but I can't get the top and...
  18. REV-XP/XS Chassis: Perf. Trail 120-129 Inch Models
    I have a 2008 800r, I need a new top end and was going to buy these pistons as they are the updated 2010 800r pistons. I just wanted to know if they will indeed work as the bore is the same?
  19. 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...
  20. 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!!!
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