875 Big bore review

[neilsleder]

It must have been close to a year ago you talked to him about the rave mod. These two guys have refined the rave mod and it really works well.


Sent from my iPhone using Tapatalk

I am not sure about an etec but I know on my ptec that rave mod was pure awesome! I already had the rk Tec drop in kit and reeds. It worked well. The took it to Deano for the rave mod and clutch tower brace and that sled came alive! I would recommend that to anyone. The big bore would be awesome either 875 or 950. Deano would be the man doing it hands down also.


Sent from my iPhone using Tapatalk

 

[BeachSled]

I am not sure about an etec but I know on my ptec that rave mod was pure awesome! I already had the rk Tec drop in kit and reeds. It worked well. The took it to Deano for the rave mod and clutch tower brace and that sled came alive! I would recommend that to anyone. The big bore would be awesome either 875 or 950. Deano would be the man doing it hands down also.


Sent from my iPhone using Tapatalk

The rave mod for the etec is the same as the ptec, they have built a new bracket around the etec style raves. And have figured out the BUDS programming to make it a fully functional mod.

Thanks for the feedback Neilsleder


Sent from my iPhone using Tapatalk

 

[Mach1]

Can that mod work on a stock xm ?

 

[BeachSled]

Can that mod work on a stock xm ?

Yes it sure will!


Sent from my iPhone using Tapatalk

 

[kidinloghouse]

i'll vouch for dean and the rave valve mod as well. great guy to deal with and i installed the rave valve bridge and the difference in the mid range and throttle response was instantly noticeable. i would recommend it on all stock or modded etecs.

 

[lilduke]

What ever happened to that 950?

Any of those still kicking around?

 

[NoBrakes!]

BIG JUGS!

 

[lilduke]

Thats how I like them

 

[1100]

There was one forsale in Alberta this fall. I saved the numbers just on a fluke it didn’t sell. Figured if I windowed my block that’s the next logical solution. I’m betting he still has it.

 

[Ghfalls]

Kijiji ad ID #1634964962
There’s one on kijiji now.

 

[bonesy]

** I wanted to share my experience in the process of buying a Big bore kit, no one seems to post much about them so I thought I would share what I found. I’m hoping this will help the next guy, and no I am not getting paid to post this, I did not receive a ‘special price’ if I wrote a review or anything along those lines. I’m just a happy customer!

So this season I decided to keep my ’16 XM and put some money into it, I am happy with the way it handles and just wanted a little more power. I also wanted to see how this new G4 chassis panned out before I hopped on the band wagon. I have been a guinea pig in the past on first year machines and really didn’t feel like doing it again. My ’16 runs great and I haven’t had any issues with it like I had with the ’14 (Such a long story)

I have spent a lot of time, and I mean a lot of time researching horse power mods for the 800 etec. Yes I did consider a turbo kit but I really don’t like having to fiddle with fuel controllers and constantly check gauges to make sure the sled is running optimal. So I decided on a big bore upgrade, I made a list of some of the major shops that produce kits. Then I started making calls, emailing people, reading reviews, talking to people who were out riding them. I found that peoples experiences were hit and miss with most of the shops except one (I’m not going to get into this because I never really asked people if I could share their stories). The one thing I did find out that most people don’t talk about is that Ski-doo’s deck heights vary so its almost impossible to buy a big bore kit off the shelf that will be a perfect match to the cylinders you mailed back to the shop as a trade in.

I found that Arctic Edge Motorsports builds more of a custom style big bore kit, they require your head, cylinders and raves to be sent in and you receive ‘YOUR’ parts back. So I decided to go with the 875cc big bore pump gas kit from Brent at Arctic Edge and have Dean at Mad Motorsports do the work for me. The motor work consisted of the usual tests (Squish test, leak down test, compression test, crank run out, ect.) before disassembly and the top end being sent off to Arctic Edge. Brent did the following – bored cylinders, ported them, cut the head, cut rave guillotines, and re-nikasiled the cylinders.

Then Dean assembled the motor and I had him to do the ‘Rave valve Mod’ (same as the old p-tec motors) but these guys have found a way to trick the computer into not needing the rave valve solenoid. This allows the crank case pressure to operate the raves, which in turn greatly improved the throttle response. I also had a ceramic coated SPI y-pipe installed that works in conjunction with the big bore. And had Dean re-install the XM performance kit he sells that I had in my ’14, which consisted of reeds, billet thermostat, clutching, gearing, chain, and clutch tower brace.

I was able to get the sled out on the snow for some testing last weekend and all I can say is HOLY SMOKES. I noticed the extra horse power and torque it produces right away. The seat of the pants dyno shows noticeable increase in power. But officially the kit produces 20-25hp extra and I can say that it is defiantly doing that. I let a few people ride my sled and at times it was hard to get it back from them, lol.

In the end I am extremely pleased with how my sled runs I literally just add fuel and ride, no fuel controllers to mess with, no extra gauges to watch, it is truly a pull and go setup. I can’t wait to get out again, I would say the smiles per mile for this upgrade is VERY high. It also made since that its Canadian built, tested and tuned where we ride!

I also had Brent do a 875 kit on my ‘15 174. Substantial difference. Very smooth power curve, strong pulling and very fun. Out preformed the 850 turbos until the 2023 model.

I hope you’re having as much fun with it as I am.