2006 MXZX 440 Racer to Mountain Conversion HELP!?!?!???

[B_DIDDY_SHOEY]

Hey guys anyone converted a newer REV 440 Racer to a Mountain Sled. I am looking @ buying a 2006 MXZX 440 Rev which I believe has the power valves on it right. I am going to be getting the sled for $3400 locally, it has 300 miles on it, perfect shape, slp skis other then that stock and was a backup racer, then trail rode a little bit in 2007. I think thats a great price? What do you guys think?

Next after purchase I am hoping to Mtn. Convert it, but unsure exactly what I'll need to do to make it a good mtn. sled for spring riding and my wife to run throughout the year.

I know I'll be putting a 136 maybe 141 under it? which would you suggest and what lug. like a 136x2 I was thinking?

Next what else do I need to do? I have been told that unlike the older 440's you don't have to mess with domes-head on the newer power valve motors. They will compensate for race fuel or 91 fuel. Is this true and if not what will I have to do to run 91 oct fuel. wouldn't mind a gallon of mix added a tank maybe but don't want to run full race or even 50/50?

Also when I go 136 or 141 will I need to gear it or will it be fine stock geared with the change, clutching also?

Basically need to know what I'm getting into but looking forward to running a fun little hot sled that I can rip on in the spring snow and the wife can throw around and handle better then a bigger sled. She's a good rider, leans them up, jumps, climbs smaller stuff etc, so I think this sled will fit her really well verse the zx chasis 600 she's coming off. Probably will outrun the 600 ho as well?

Give me the scoop and especially info about the power valves, if I can run 91 without doing anything or not?

 

[revinit]

this is a very tough conversion. i did it and it was way more work than it is worth. the 440 motor does NOT do well in the moutains. you would probably need to swap motors. the 440 is just too picky and very hard to tune and clutch for high elevation. the shocks are way to stiff for mountain riding. i hated them and my wife was miserable. gears are fine for an 800 motor. if you like to turn and side hill in the powder the ski stance is too wide. it is hard to stretch the skid past 136 because of the sc4 suspension. cant get rails. when you stretch it past 136 you will have cooling issues if you do not get a new cooler. tracks can be an issue because of the 15.5 inch wide tunnel (not 16.5 like regular sleds) if it stilll has the 5 gal tank you will probably want to go to the 10 gal tank. i am not trying to kill your idea, just giving my $.02. it took me 2 years but now this is a great sled for me. 800 mod motor, 151x2.5 with avid drivers and custom skid, revalved shocks with new springs, dj clutch kit, holz a-arms, spi pipe and can, usi skis, 159 cooler, 10 gal tank. this is now about a $15,000 sled. get a summit 144 and never look back! does trails and jumping very well and is a great mountain sled. should be able to get one for like $4500. pm me if you want more help with the conversion

 

[B_DIDDY_SHOEY]

I am kind of set on doin this, however just want a sled that performs in the end as well?

I like to be different and this would be a fun sled I think. I have a 975 for the deep winter days but wanted something short to play on in the spring and hard stuff, jump, etc. also for the wife to run on around on.

What would you say about price to finish this conversion: I see posts on dootalk.com about $700 for all the parts to do the conversion as skidoo recomends. However some of it seemed unecesary to me?

I was thinking about running it on race fuel and trying it that way, would it be fine to leave race setup and getting the shocks revalved lighter? would it run good in the mtn elevations and changing elevations running stock race setup?

Also could I just get away with changing jets, power jets, needles, and run 91 oct? let me know please?

One last thing- the racer who owns it told me that the power jet will adjust for the oct fuel running in it and I could run 91 or 108 in it stock setup without doing damage? This is a big one, I wonder if its true but would think he would know about these sleds????

thansk

 

[eddy]

Conversion

We have done this too and it is way to much work and money.

The quick and dirty way to do it is just put a 121 X 15" X 2" Tall track under it and go! This is a jumper that will still go in the loose. Yeah, run the race gas or you will be surprised one cold morning when you take off from 10,000 Silvers and blow it up a mile down the trail.

The changes the factory makes on the mountain machines are subtle but profound in their effect. Little things like fuel pick up, clutching and gearing are just the beginning.

BTW, until about 6000 feet the 440 goes fine with a talented rider. Above and it is severely challenged, even with a short track.

If you budget at least $3500 plus the machine you may en up with something that almost is as good as a Summit 600 after you put the 600 jugs on your 440. Not worth it except as an excuse to go to the garage to drink beer!

 

[snosumitcsr]

B-Ditty, i have a 03 Rev 440 converted into a 144" 2", with a bigger heat exchanger,a 740 crankshop top end on the 440 bottom end team clutch. stock resivoir shocks, revalved and rebuilt i could sell you already set up with low miles if you are interested.
Sled runs all day on 91 Octane at 3,000 ft
Rod

 

[B_DIDDY_SHOEY]

So here's my question:

Will the sled run on race fuel as is in the mountains without problems (3000-6000ft? Is the 440 motor factory on the 2006 a rip'n motor or just ok. Compared to like the 01 600 skidoo we just sold. i have never rode one and just thought that they looked like a light rip'n little sled, but didn't want to have a bunch of cash into a sled that is ok but nothing impressive. i thought the short track fun factor looked good, but don't want to possibly pay for race fuel for two sleds plus have to put major $ to make it less power, plus, etc. etc.

Basically by taking the 440 and mountain converting it I am making an underpowered 600. Is this what I'm getting or is there any advantage/performance the 440 would have to the 600.

So my options look to be either buy it and run it race setup as is with a 2" track on it or don't mess with it. Is this right? and it will run as is good in mtn or not? Just expensive for fuel?

So my choice looks like either OEM 2006 440 w/2" track or a polaris iq 600! 440 fun for me in spring, iq good backup and prob. better decision for wife since long tracking the 440 is extensive and must include, gears, clutch, yada yada.

WHAT YALL THINK?

Also $3500 for a 2006 440 w/300 miles good? or $4400 for a 2007 iq 600 w/600 miles better better?

 

[snosumitcsr]

the 440 will not outrun a 600 in the mountains, and the 440 race fuel question depends on comp ratio and race ignition. they change from year to year. if the sled is for your wife, i would just get her a 600 instead. the shock and spring valving is very stiff, like landing from 20 feet off the ground stiff on the 440, only for very aggressive riders.

 

[B_DIDDY_SHOEY]

thanks to those who posted, I think i'll beg the 440 conversion since I will be spending tons of cash to make a sled not as good as a stock 600 for mtn. riding and 600 power.


May look into a new phazer mtn lite for her then maybe someday later i can turbo that for my pleasure?

if not a 600 rmk iq will be it...

thansk

 

[jeremysavard666]

alright i know this isint the right place to ask but its the only thing ive found on 440's...umm..just wondering how reliable they are...i found a 04 440 that runs on pump fuel and im kinda interested....i play alot in pits....open water....and bairly trail ride..would this be a good sled for me or am i going to get myself into somthing bad??...ive wanted a 440 for a while but dont know how much of a long lasting sled it is??

 

[eddy]

440 lifespan

They will run 4000 miles if you run the correct fuel and oil - no problem. Freshen the top end and it will go on toward 8K. Then its time for a top and bottom end job.

 

[711SnoPro]

First order of business: put an 800 H.O. under the hood

2nd: Go rip $hit!!

yeah you can't climb with the big guns but that chassis with a bigger engine in it is frikkin AWESOME!!

 

[Original Tetonice]

I know a few folks that snocross and use there 440's in the backcountry. They add 1.5 inch paddle tracks and go. Granted there not breaking trail in the deep stuff or climbing. But for general boondocking in 6" to 10" of fresh those on the 440's are still having a blast. Im not sure you can get a 1.5 inch camo in a shorty.

In the spring time the 440 with a paddle conversion rip's in the Wyoming backcountry.

OT

 

[tha dude]

i did a conversion again last year and will be givin the wife the sled to ride this year and moving to the XP chassis...

07 440 with an 800r motor, stretched to 136 with a 2 inch track.. sled rips and was a blast to ride... not sure how a 440 would work never actually rode a 440 chassis with a 440 motor..

i would think if keeping it under 136 the 440 motor would be fine (obviously not as much power as a bigger motor) but still could manage..

use MMP rail extensions and remember when looking for a track the 06+ are a 2.86 pitch..

good luck

 

[pinnedunderdoo#3]

just buy a summit for like 5 grand save so much time and money

 

[jeremysavard666]

its hard to dicide..i dont want to get it and be like **** what did i get myself into..the sled is already trail converted( profesionaly done) i dont do much trail riding but i still do some....other then that we dont get much snow here...max 2 feet of snow so the powder wont scare me...i usualy ride in pits/lake ride/open water/playing in open feilds and some little hill climbing...i just like to screw around jumping(famous last words...watch this guyslol)....so what do u guys think..good sled for what i do or should i be looking at somthing else??

 

[jeremysavard666]

ummm anyone have a opinion on it?