700fi - motor build -UnleashedUTV

Ok after a few months of testing I wanted to do a write up on my experience with my recent testing with my new motor that Unleashed UTV put together for me. I wanted to put some hours on it before I said anything.

Since there are not to many built 700fi motors out there I wasn’t sure on what worked and what didn’t. So a lot of testing happened and a TON of hours went into my car trying new things to make this 700fi perform better; we found something that really works!

What we finally came out with was a petty descent power package over the average bolt on exhaust intake combos out there-
It consists of a +5mm stroker crank taking it from a 686cc to a 727cc. 11:1 High compression piston. Stage 3 cam. Dual valve springs and Ti retainers. We left the head and valves alone for now; mainly to see how it did with out modding the valves and flow; this also helps keep cost down quite a bit.
I already had DMC duals and a rigid intake(which is an adapter to mount a unit pod filter- so you can remove the lide) and a msd.

Well after a few hiccups with getting parts from Yamaha(seals) we got the motor all together and running smoothly. I then brought it over to get dynoed by Wellers(big shout out to them for squeezing me in) and got it running even better; we were over 45hp before any fine tuning was done. One thing we notice was we needed to work on the clutching ( this I think was holding us back on making a few more hp) so I took it back to Unleashed and Champ swapped out some weights and gave those a shot for the time being.

First time home with it I put a few hours of easy riding on it breaking it in but the need for speed was coming over me. I then got on an open road in my neighborhood and punched- it flew up to 67mph like it was nothing!!! (Also the rev limiter was set at 8k- unlike other guys that bump the rev to get more mph) It climbed so fast from 50-65 it was nuts! I then let off and went back home- the motor felt like it still had more but was felt like it was limited from the clutching.

The next test was the Glamis Night ride. Greg(owner of Unleashed UTV) and I headed out to do some real testing with my new motor. When we got there we did some little rides and I quickly noticed how much low end punch it had! I thought I might have lost some of it with doing the high rev cam but soonly noticed that the motor is mainly in the highier rmps anyways in the dunes; so it seemed to be fine. I also noticed full throttle was not needed for most of the hills that before needed them before the motor work. I could cruise with ease and not ever have to worry about if I wasn’t going to be able to make it up any of the hills. It made duning a lot more comfortable because I felt at ease with the extra power; knowing that I had it there when I needed it, rather then being maxed out all the time before.

Coming back to camp I did a few high speed runs along the flats and was hitting 67mph again! Before I could only hit about 50 in the sand with my last intake exhaust combo. I am running a 7 paddle smoothie skat trak combo on Douglas rokstars. After this I was very impressed! Next day we did the real test and went to China Wall- one of the biggest hills in Glamis. After watching a few cars not able to make I gave it a shot- and was completely amazed on the speed I was about to keep while going up it. It went right up it with ease-making it the first 700fi rhino that I know of that has made it up China! We continued to ride the rest of the weekend with no issues and never failed to impress me.

Next trip I did to test out the low end power was a rock crawling trip to Box Canyon in Florence. And again thinking that my low end would have suffered from the high rev cam would come in to play never seemed to be an issue. The motor loved to crawl through the boulders and fly up the big hills we I felt I needed to give it some extra gas. All and all I was very impressed on how it did and couldn’t have seen how it could have performed any better.

The motor seemed to run cool and very smoothly. For anyone that has really watched the 700fi motor run; I am sure has noticed that for some reason it has a bad vibration (a lot worse then the 660). But after installing the new crank and piston; it seemed to run better and have alot less vibration. So I am very pleased with the out come and cant wait for the heat to go away and riding season to come back so I can drive it some more!!



*****So if you have a 08-09 700fi and want more power then the average guy that has a pipe and an intake; then Unleashed UTV is the place you need to call. Mike, Champ, and Greg will make it right for you with anything that you will need to make your 700 run better. Also if you have any questions - give them and call and pick their brain-never a question too stupid to ask!
They are a good group of guys that are very knowledgeable on the 700fi also including the Rhino 450, 660, Teryx, Ranger, Rzr.
They can help you out with pricing and building you the perfect power solution/needs for your car.

Unleashed UTV 602-246-4011
for pricing call Unleashed and talk to either Mike or Greg- if you have any questions on how it performs or any tech questions- let me know

Good write up and info. What was the benefit of going the way you did versus a Weller Package, say stage 3 or the 734 stage 4? Basically what i'm asking is why did you use Unleashed instead of Weller for your build? I have a 660 and have been looking at Weller for a possible motor upgrade in the future.

Also would be good to hear Tim (WV Rider) chime in here and tell about what he did to his 700 motor, and the results.

wellers is a good shop for sure!

Unleashed has been working on this 700fi motor for a while now and we just wanted to put together a reliable well priced kit. we had some issues and fixed them so now we can share this info-my motor was rebuilt 3 or four times until it was right from different products we tired

08Rhino700 wrote:

wellers is a good shop for sure!

Unleashed has been working on this 700fi motor for a while now and we just wanted to put together a reliable well priced kit. we had some issues and fixed them so now we can share this info-my motor was rebuilt 3 or four times until it was right from different products we tired

What is considered "well-priced" in your mind (ballpark)? You can send me a PM if you don't want to shout it out on here on the open forum.

Here is Wellers site LT. Your looking at 4-5K complete.


http://www.wellerracing.com/Rhino700.htm

08Rhino700 wrote:

wellers is a good shop for sure!

Unleashed has been working on this 700fi motor for a while now and we just wanted to put together a reliable well priced kit. we had some issues and fixed them so now we can share this info-my motor was rebuilt 3 or four times until it was right from different products we tired

How is the differential and final drive holding up to the increased power? Axles too?

lets say about half for the same amount of hp power
again it all depends on what you need and already have.

msd
dual pipes
intake

are needed but most already have these items but then again these are included in wellers pricing either

wvyankee2 wrote:

08Rhino700 wrote:

wellers is a good shop for sure!

Unleashed has been working on this 700fi motor for a while now and we just wanted to put together a reliable well priced kit. we had some issues and fixed them so now we can share this info-my motor was rebuilt 3 or four times until it was right from different products we tired

How is the differential and final drive holding up to the increased power? Axles too?

fine so far- they can hold up to alot more power then what I have.

I did have a cv start clicking on me on that last dune trip but I already had alot of hard miles on it so I replaced it. I kept if for a spare just incase i grenade one like the one before it.

08Rhino700 wrote:

lets say about half for the same amount of hp power
again it all depends on what you need and already have.

msd
dual pipes
intake

are needed but most already have these items but then again these are included in wellers pricing either

You have to send them your motor, or do they do a core swap?

08Rhino700 wrote:

wvyankee2 wrote:

08Rhino700 wrote:

wellers is a good shop for sure!

Unleashed has been working on this 700fi motor for a while now and we just wanted to put together a reliable well priced kit. we had some issues and fixed them so now we can share this info-my motor was rebuilt 3 or four times until it was right from different products we tired

How is the differential and final drive holding up to the increased power? Axles too?

fine so far- they can hold up to alot more power then what I have.

I did have a cv start clicking on me on that last dune trip but I already had alot of hard miles on it so I replaced it. I kept if for a spare just incase i grenade one like the one before it.

I kind of suspected that. The sand is much more forgiving with slippage on the take offs and landings than the hardpack and rock here. Sometimes you have to watch the gas peddle with a 660 stocker on some stuff here.

i dont know on the motor question about shipping - you woul have to call them on that.

yeah Im allways worried when I go hi the rock trails- alittle too muck wheel spin over a rock and then grab traction and its all over- with the +6 axles it make it even more nerve wrecking but (knock on wood) not one broken axle yet!!!
and i have spent alot of time airin it out- key is to land with out your foot on the gas

I should probably just keep my mouth closed but!!

We did a simple 11:1 piston, stage II cam, Muzzy pipe and MSD with totally stock intake and can do everything that one can do.

The piston, cam, gasket set and head studs will run you about $650 with us.

I am totally against stroking one even thought it does give more HP, they will cause problems down the road in the rhino engine.

I raised my rev limiter to 8500 and hit it hard.

hunterworks wrote:

I should probably just keep my mouth closed but!!

We did a simple 11:1 piston, stage II cam, Muzzy pipe and MSD with totally stock intake and can do everything that one can do.

The piston, cam, gasket set and head studs will run you about $650 with us.

I am totally against stroking one even thought it does give more HP, they will cause problems down the road in the rhino engine.

I raised my rev limiter to 8500 and hit it hard.

it can do everything this one can??? lol oh ok there Todd- this is why we always call you out because you are retarded. How are you still in biz?? so how do you think a lesser displacement motor with a less agressive cam will be the same??

wow so what problems would that be Todd with a stroker??

and i seeing that you are over priced. 650 for that-wow- if anyone wants that set up I can do that for you too with a map for the stage 3 cam.
if anyone needs any parts please let me know- I will beat all of Todds over priced stuff.

Is that all I need to to Todd - raise my rev limiter to 8500 and hit it hard???? lol