700 motor into a pro

[yz400ex]

Has anyone ever put a cfi 700 into a Pro chassis? I am thinking of doing just that and am wanting to see what I am up against. I know it will all bolt in just fine, but is there anything I should know before attempting this? What pipe to use? Pro 800? Pro 600? Modded 700 dragon pipe? Just tossing this idea around and was wondering what the thoughts were regarding the pipe or any other modification I am unaware of.. Any input is appreciated..

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[turbolover]

Id bet if you could get an 800 pro pipe it would. If anything you might have to change the size of the stinger.
Might be easier than trying to cut and weld that dragon pipe

 

[yz400ex]

Id bet if you could get an 800 pro pipe it would. If anything you might have to change the size of the stinger.
Might be easier than trying to cut and weld that dragon pipe

I compared the 800 pipe and the 700 pipe and they are quite different. The length, the bends and the mount/bracket piece are all different. I am sure this can all be fixed and work fine, but if an 800 or 600 pipe would work ok, i would rather go that route just to save myself the headache.. :beer:

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[diamonddave]

It would depend on alot of the specifics whether this is a worthwile project.


IE. Does your existing Pro have a hole blown out the case? Do you already own the sled? Do you already have a 700 CFI-4 motor and electronics to install? Do you think the 700 CFI-4 is more reliable than the 800 CFI-2 and is this the justification?

Personally, the 600 CFI-2 would be a much better way to go. The 600 can easily be made into a 660 (700 pistons) and still retain factory all of the factory parts. A Carl's 660 WILL run with a good running 800 (and most of thime better) UNTIL the snow depth gets 3 feet plus. Taking this into account and the much better mapping the 2 injector provides not to mention the fun factor that cannot be explained into words with the 600/660, this would be a much better route.

And the stock 600 CFI-2 is no slouch either.

Don't forget, the 700 CFI-4 is still hampered with the same electronics as the 800 CFI-4 which has been the biggest weak link of all of the IQ-RAW chassis EFI sleds produced from 2007-2010. And while it doesn't get the press due to the percentages of sleds built and ownership, the 700 is NOT bulletproof nor is the "snowest" image that it doesn't have issue's totally true.

Please don't think I'm saying the 700 is garbage. It's not and neither is the 800. Up until this past season, I had rebuilt more 700 CFI's than I had 800 CFI's. Both are sweet running motors.


BTW, if you really are committed on this path, give Curt at Fastrax a call. If I remember correctly, he built a sweet T-Pro with the 700 CFI-4. I'm sure he would/could give you all of the in's and out's.

 

[yz400ex]

It would depend on alot of the specifics whether this is a worthwile project.


IE. Does your existing Pro have a hole blown out the case? Do you already own the sled? Do you already have a 700 CFI-4 motor and electronics to install? Do you think the 700 CFI-4 is more reliable than the 800 CFI-2 and is this the justification?

Personally, the 600 CFI-2 would be a much better way to go. The 600 can easily be made into a 660 (700 pistons) and still retain factory all of the factory parts. A Carl's 660 WILL run with a good running 800 (and most of thime better) UNTIL the snow depth gets 3 feet plus. Taking this into account and the much better mapping the 2 injector provides not to mention the fun factor that cannot be explained into words with the 600/660, this would be a much better route.

And the stock 600 CFI-2 is no slouch either.

Don't forget, the 700 CFI-4 is still hampered with the same electronics as the 800 CFI-4 which has been the biggest weak link of all of the IQ-RAW chassis EFI sleds produced from 2007-2010. And while it doesn't get the press due to the percentages of sleds built and ownership, the 700 is NOT bulletproof nor is the "snowest" image that it doesn't have issue's totally true.

Please don't think I'm saying the 700 is garbage. It's not and neither is the 800. Up until this past season, I had rebuilt more 700 CFI's than I had 800 CFI's. Both are sweet running motors.


BTW, if you really are committed on this path, give Curt at Fastrax a call. If I remember correctly, he built a sweet T-Pro with the 700 CFI-4. I'm sure he would/could give you all of the in's and out's.

Dave,

Great info.. I really appreciate the input.. Let me explain a little bit of my curiosity for this motor selection.. I am building a Pro right now. My Pro currently has no motor at all.. I have every piece of wiring and electronics for everything, but no CFI or motor at all. I have priced out buying 600, 700 and 800 motors.. The 600 has been the cheapest, but not by much. At first I was thinking 600. I just came off of a 600 and I LOVED it. I didnt know what to think at the first of the season, but by the end, I was hooked on a 600. I was very impressed to say the least. In our fleet we also have a 660, so I know about that option as well.. The 800 motor prices seem to be really high. I can almost buy a complete donor sled for just over what people are asking for their 800 motors, but right now (whole sled or not) that just isnt a feasable financial option for me until I get a few other things sold. Reason I am asking about the 700 is because I have run accross a 700 motor with everything to just drop right into this sled for a pretty good deal. The 700 engine was actually the last pick, lowest, last ditch option that I wanted to put in this sled, but an opportunity has come up and its something I cant pass on.

Sorry for the long story, but this is why I am thinking 700 right now..

 

[440dart]

find a cheap 840-860 thats what my buddy is doing his 840 rips

 

[champyfz450]

Curt at Fastrax also has a full 700cfi setup that is a pretty good deal. I spoke with him this morning

 

[richracer1]

I have considered doing this very same thing with my 777 engine. The big item for me is having SLP custom make a pipe system that is tuned for my 777 and fits in the Pro's chassis - big $$$$. The wiring harness from my CFI-4 made need to be altered to so as to fit the components in the chassis - kinda easy - cut and splice job. One last thing is, I don't know if the CFI hood harness (goes up to the headlights & MFD) will work on the Pro - Timbersled makes a guage lifter for the IQ-RAW MFD that solves this problem - again, some custom fitting may be required for the headlight wiring.

 

[SnowRider1]

Keep this going and keep all the info posted. This should be good!!!

 

[Big D rmk700]

My 08 700 was a electrical nightmare!!!

 

[yz400ex]

My 08 700 was a electrical nightmare!!!

In a pro?

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[yz400ex]

Anyone have anymore info on this?

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[94fordguy]

I'm just curious whatever happened to this project?

 

[Teth-Air]

I will tell you that after owning a 2010 RMK 700 that my son rode, I sold my Doo and bought 2 Pro's. One 600 and one 800. The 700 was one of the best sleds we ever owned. He rode it to the bars for 4200 kms and never had a problem. It beat up on most of the stock 800's too.

Now when I got the 600, we were really worried about dropping 100 cc's but the lighter chassis made it a wash.

I would definitely endorse you doing this project and think you will find it rips.

btw The 600 pipe on the Pro has a little less diameter in the expansion chamber than the 800's. so I expect the ideal size for the 700 would be somewhere in between.

 

[yz400ex]

I'm just curious whatever happened to this project?

The 700 motor project got completely scrapped.. I wound up buying it from a guy and when he shipped the stuff to me, he sent me about 1/2 of what I paid for and then wanted to argue that I told him I didnt want what he didnt send so he sold it.. WTF!! Anyway, I wound up scrapping the 700 option all together because if I had gone through with trying to buy what I would have still needed (especially since I already paid for it once), I would be into the motor for more than I could just buy a 600 or 800 motor for. I wound up getting a 600 engine and am in the process of building it now.

Still trying to find a pipe though.. Found lots of 800 pipes, but not many 600 pipes out there at all.

 

[94fordguy]

It just peaked my curiosity as I love my 700 and as strong as it pulls now, I would love to see what that motor could do in an almost 70lb lighter chassis Aside from fitting a pipe, I don't see why it wouldn't be a fairly straight-forward install.

 

[richracer1]

It just peaked my curiosity as I love my 700 and as strong as it pulls now, I would love to see what that motor could do in an almost 70lb lighter chassis Aside from fitting a pipe, I don't see why it wouldn't be a fairly straight-forward install.

As for the engine itself, yes fit right in. The problem is you have to use the 700's electronics and wiring harness and of course find/make a pipe to fit. I doubt the 700's harness will work with any of the Pro's MFD so that's another issue.

 

[Keith517]

Do you have to have a motor plate custom made or will the ones from the Pro bolt up to the 700?

 

[yz400ex]

The straps from the Pro bolt right up onto the 700 engine. The left side of the engine needs to be drilled and tapped a little bit right by the PTO. Normally a torque stop hits the motor there on the IQ I believe, but on the pro, there is a bolt on torque stop/mount. Easy enough to do. As for electrical, I do not think the Pro MFD would work with the IQ wiring/electrical because the IQ stuff is all AC and the Pro stuff is all DC. Would just be easier to use the IQ MFD if you were going to run an IQ engine in the chassis.. I looked into all of this a great deal and am confident I could have or still could complete this task, but unless you were in a situation like me or just had a roller Pro and a spare 700 motor, its not going to be cost effective. The 600 engines now almost produce the same power as the 700 anyway and you dont have to mess with any electrical or pipe or anything else.. I wish this project would have worked out for me, but it just wasnt in the cards.. I think I will be more than happy with the 600 engine though.. I was happy with the carb'd 600 HO in my IQR so I am sure the CFI 600 in a Pro is going to be just fine.. The motor I am building is even a frankenstein of motors.. I love doing things this way so I learn a lot as I go.. what works and what doesnt.. This entire build has taught me so much even though I didnt get to go through with the original plans..

If anyone is thinking about doing this or just has any questions about it, please ask. I educated myself a lot on this build and have had every single piece of this chassis apart..

 

[richracer1]

I looked into all of this a great deal and am confident I could have or still could complete this task, but unless you were in a situation like me or just had a roller Pro and a spare 700 motor, its not going to be cost effective.

Or like me, and have a 777 engine that would be smokin hot in the Pro chassis.