go for it

 

Best option when rebuilding these engine yes. Also be sure to get a Power Commander if you don't have one already. Cleans up the lean midrange which has caused burndowns and adds an extra 8-10 Horsepower.

 

Thanks for your advice. but with the power commander I was reading on The MTNTK web site and it says ...........(Fueling stock engines or mild modification: Our recommendation with the “FIX KIT” is to remove any aftermarket fuel controllers and have it re-flashed to the original ’08 flash.)......would it be better to do this or to do this and the power commander ?

 

I dunno why MTNTK says that, you will still have a very LEAN midrange. I think it should read that "no additional tuners required, but don't hurt", haha. I would still recommend finding a cheap PC3 or something and downloading Jim's 800 maps for the April 2010 re-flash.

I have installed about 4 of my own fix kits (spacer plates and AC pistons) and they have worked out awesome. 2 of them went into 600r/800 mono's, 2 into D8's. My theory on it so far is "It can't hurt anything, so why not". If you price it out and order the parts off the internet you can get it for less than/or right around $300.00 for complete kit with wiseco pistons, cheaper if you run SPI's.

 

Install the power commander and stick to the flash that's on the ECU!

 

Is the arctic cat 800 piston and the piston in this fix kit the same piston? And if so from what year ac is the piston from ? Also if after install the kit and hopefully thousands of miles later if I have a piston failure would I be able to use the ac 800 pistons .As far as price wise every kit I look at on eBay is around $430 plus shipping for the spi one and around $500 plus shipping for the wiseco one , that's Canadian. The Polaris dealerships here as them for $585 for the wiseco kit .

 

Do a search for "2460M08500" on ebay, that is the Wiseco part number. Right now there is only 3 places selling them. I am guessing because its the end of the season. Mid season there's hundreds of them. I will include the link to the ebay add that I was buying them from for $96.00 and free shipping. But it is no longer active, thats not saying they don't have any, send them a msg and see. Ohh its the 2010-11 M8/F8 2012 F8 Piston, they will be making them for a LONG time.

Wiseco Piston Kit 85 00 mm Arctic Cat M8 162 Sno Pro 2010 2011 | eBay


Credit to HCS member 900cc for giving me the Arctic Cat piston part numbers.

Update: If you search amazon with that part number it pulled up some as low as $83.99.

 

Thank you very much

 

Where would I be able to find the spacer that goes between the crank housing and the cylinder jugs by its self ?

 

I harrassed a couple of the guys that where selling the fix kits on ebay. I picked up the bolts, sleeves, and spacer for $90.00. I will try and get you a number, I just want to make sure they will still sell them separate. I and a friend hope to have a batch of the 08-10 spacers made up in the next couple months myself, but don't have a set date.

 

My coworker has a used spacer and the bolts if you need them.$70.00 shipped.

 

I have the fix kit and powercommander on my sled. DO NOT RUN THE FIX KIT or ANY Dragon 800 without a fuel controller. The mid is crazy lean and guys were burning down fix kits even though they state you don't need it.

 

i have power commander for sale dyno tec.for a 09 dragon only used it for a month.250 plus shipping.paid over 400.pm me if interested

 

I had 2200 miles on mine and would still be running it if not for my crank problem. I fought det and limp mode for a while but had it working real well this year. Like said get you a pcv and you will be satisfied. I just ordered the ac wiseco pistons, other parts, and crank is on its way now. Should be up and going this weekend.


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is the ac wiseco piston 2460M08500 the exactly same pistons the fix kit use?
can i use 1 ac wiseco piston and 1 wiseco fix kit piston? my pto burned down but the mag piston is good

 

I have an 2009 dragon 800 switchback As the title says I was wondering how many of you have the fix kit installed on their 2009 dragon 800 ? Mine was starting to get a bog in the top end so I did a compression test 80 on clutch side and 100 on other when pulling over 5 times , and 90 and 120 when using electric start . Just wondering how well this fix kit works what the guys that have installed them think of them and how many miles guys have rode problem free . What to know if it's worth the money to do or just put factory pistons in . I was looking at The MTNTK “FIX KIT” as it is the only one I can get here in Manitoba with out ordering one off Internet . Avenue Honda Polaris sells them in portage la prairie .

We (MCB Performance Center) sell and stock these kits. ($385.00) Comes with complete top end gasket set, and a second base gasket for the bottom of the shim plate. Includes the shim plate, longer dowle pins, .240" taller pistons with reduced skirt taper as compared to the OEM Polaris piston. It's the reduced taper and the taller skirt that eliminates the piston "slap" for improved reliability. The added crank case volume due to the shim actually gains a couple HP. Squish for our kits ends up exactly the same as factory Polaris squish. We have the kit on our own 2009 Dragon, and several customers sleds with no issues. I've also seen instances where a fuel controller is required on some, but not on all sleds. You will definitely need the fuel controller if you have the SLP pipe and then add the shim kit. See attached photo. To order or questions call 810-395-7162 www.mcbperformance.com

 

fix kits don't work for long term reliability. the problem with the stock motor is piston skirt surport and soft cast piston's. which leeds to piston skirt collapse. the piston skirt drops 1/2" below the cylinder skirts. and now your going to move the cylinder skirt up another 1/4+". this leeds to less piston skirt surport. not more. the best answer is a better tolerance piston. and a stronger piston. I have almost 6000 miles on a 2011 pro rmk with rk-tek direct piston's and a stage three kit. I have thirteen 800 c.f.i. sleds with these pistons in them. anywhere from 400-5600 miles on them. a couple with over 4000 miles. 100% success rate so far. pretty hard to argue with that. I did a ton of research before I when with the rk-tek pistons. i'am glad I did. a lot of issues with the fix kits is what I found. and yes not all rk-tek piston/drop-in kits have worked . but a lot less problems I found with these. not trying to rain on anybodys pararde. this is just my findings. take it for what its worth.

 

I really don't know what causes the issues with these engines. The most knowledgeable engine builder I know of, who is in close relations with Polaris, says its the rod that is not long enough and putting a longer rod in these 800's is the best way to go but a fix kit will work.
I did a ton of research before buying an 09 Dragon 800 and going with the fix kit rout. I know the D8's have allot of other issues as well so i went a cheap fix kit rather then put in longer rods in case the sled turned out to be a lemon. From all the research I did I could only find one instance where a piston OR cylinder skirt broke off after a fix kit was installed. They don't know for sure but they have a good idea the cylinder skirt was already cracked before the fix kit was put in because the engine went down a short time after the work was done. Sure allot of sleds have seized and melted pistons with fix kits but that would have happened regardless.

 

With these engines ya need to install the longer rod. Think about it like Rick said... Put a shim kit in and it raises the cylinder causing further "slop" in the piston.
BUT... With my 2 D8s I hammer on them and beat the crap outta them and they are both looking good when tore down.
Go figure...

 

I bought a used sled that already had the fix kit in it. Can I buy arctic cat 800 pistons from rk-tec to use with the fix kit? I do not have the original dowls and bolts, so I will not be going back to stock.

 

Not sure about that but you can go to your local Arctic Cat dealer and buy them there.

 

I really don't know what causes the issues with these engines. The most knowledgeable engine builder I know of, who is in close relations with Polaris, says its the rod that is not long enough and putting a longer rod in these 800's is the best way to go but a fix kit will work.

Same imfo I got from my inside guy at Polaris.

 

battlestorm,
i was not really referring to oem arctic cat piston. I believe the fix kit uses piston for 2012 and newer 800 cat engine.

 

Well who's fix kit are you refering too then ? RKT ? Well RKT does not make a fix kit so ? Some fix kits use the Wiseco AC pistons, some use Wossner, and some use Arctic Cat oem pistons.

 

spacers

I have spacers, bolts, and longer dowels, and gasket kits for anyone needing them. pm me

 

buddy of mine had indy dan do a long rod fix on his 09 800 rmk motor world of difference if you can swing the $$ to do it

 

Thanks for everyone's input and advice it's very much appreciated . I ended up going with The MTNTK “FIX KIT” I guess Ill see how well it works in the next riding season I got it from the Polaris dealer in portage la prairie here in Manitoba it was around $ 650 they said for $200 they would install it I'm a diesel mechanic by trade but for $200 I figured why not , after tearing it down he found a rather large crack in the block took pictures and texted them too me I thought ohh great but they had a block there and he gave it too me for 75$ . When I went to pick sled up the mechanic showed me the difference in thickness between the 09 and 13 800 blocks it was quite thicker .Bottom line here is that Polaris dropped the ball in a massive way and did nothing to rectify their mistake this will be the last Polaris product I buy .