Mtn Tek fix kit: difference between 2008 and 2011+

[TheBCSledder]

Hey guys, just bought a 2013 Pro with 1800 miles on the original engine, (100 psi on a cheap tester) and am considering putting in a Fix Kit from Mtn Tek. They list two kits on their website though, a 2008 to present, and a 2011-2015. I'm wondering what the difference is, as the "2008-present" name would suggest that kit would fit any 800 CFI polaris. The 2011-2015 kit is about $100 more expensive though. Anyone know whats up? TIA.

 

[Tchetek]

I used a kit labeled 2008+ on a 2012. I believe the pistons are the same. They were wossner pistons and a spacer I purchased from mots machining in Edmonton. Give them a call they will clarify the differences if any.

Don’t hesitate to do the rebuild. My machine had 1500 miles no issues and ran great. 117 psi both sides.


But when I opened it up I found a cracked cylinder skirt ready to let go.

 

[TheBCSledder]

Good to know thanks. I'm thinking it's probably best to freshen it up now rather than waiting and wrecking the whole engine if something is going wrong.

 

[TDR]

Definitely add the fix kit. I have installed about 10 of them and it’s relatively simple. Pay attention to the ring gap it’s critical. I would bet the 11-15 has Wiseco pistons, but it’s easy to ask. Mtntk guys are great to deal with. And as noted above check that monoblock carefully for cracks. 13-15 seem to be better than the older ones. This will wake the sled up a bit too.

 

[TheBCSledder]

I had a kit on my 2008 and had great luck with it.
On a bit of a tangent, has anyone used the MCB kit or have experience with their pistons?

 

[Kyle89]

I looked at several kits for my pro (mtntek) being the most common but I went for the rk tek pistons. Both have great reliability. You can read about his info on the shim vs no-shim fix. I like his take on it as hes a very knowledgeable 2 stroke builder, and your not paying 700$ for 2 pistons and a shim plate

 

[neilsleder]

I looked at several kits for my pro (mtntek) being the most common but I went for the rk tek pistons. Both have great reliability. You can read about his info on the shim vs no-shim fix. I like his take on it as hes a very knowledgeable 2 stroke builder, and your not paying 700$ for 2 pistons and a shim plate

I used his pistons and head on my summit. It flat out worked! I wouldn’t hesitate to use his stuff. If you want the mtntek Kit give Chrisco on here a shout. He sells the kits and knows his stuff.