[Hrc630]

Its not just the cam slider, its also the cam...

[chuddly]

I am running the Dr Pulley OD weights.  They work well and I can tell you that they pretty much do what you are looking for.  They dont give much more top end at all (maybe 1 or 2 MPH at best).  But out of the hole they sure do help.  I ordered my helix sliders/cam sliders today so i hope to see them next week sometime.  If that is the case i will get a belt in and put it all back to like factory was (but leave my OD weights)

Hrc630.  I agree that our clutches are not efficient at all at putting power down.  But I am not in a place to flop down $1200 for a wet clutch delete kit.  Plus i dont think the wet clutch is really the issue here.  And the R&D that it would take to redesign the sheaves is well beyond what I want to take on currently.  Plus i really dont need to hit 75mph at all.  There are 2 ways to make a faster machine.  You can make it more efficient or you can make it make more HP.  Efficient would be nice and i can do some of that by taking weight off and so on.  But for now I will just make it make more power.

[chuddly]

Its not just the cam slider, its also the cam...

If you think you know where the issues all lie on this clutch then I vote you hop on redesigning it.  Its a MASSIVE guess to say that its the cam profile that is causing the issue.  It could the ramp rate of the track for the weights, The material the cam shoes are made of, The material the sheave is made of, the taper of the sheave face or any number of other things.  Its crazy to just guess like that and HOPE that that is the only issue in there.

[Hrc630]

I can assure you the best bang for the buck is the wet clutch delete.

I am just telling you that its a big waste of money to try to extrac a significan gain in hp from this type of engine. Way more easy with clutching. Also i play with sled for the last 20 years and i have try at least 10 différents set up with the stock primary and secondary on my ZForce before putting the race kit. The reaction with the stock primary or with the Trail Block on my bike are exactly like it should but for the secondary its an other thing. I am pretty sure the secondary is the weak link. I dont know how to resolve it for now but i think its the first place to look.
An i never say that the secondary is the only trouble... i just say that before putting Time an cash in a port an polish your better to work on the clutch system.
Without a turbo charger or an extensive engine work the gain will be marginal at best.

[NMKawierider]

Just my thoughts for the day. As I was putting mine back together from checking out the tank filter...and finding nothing I thought "WTF am I doing here?" So what if it only does 63-65 or so, the most you can do on forest service roads is 35.. legally. I hardly ever exceed 45 on.. anything.. normally. This thing wasn't bought for use as a high-speed desert racer or blowing downs road at 75mph, it was bought for leisurely trail rides with the family, exploring and enjoying nature. It does all that well..and it runs just fine, power's up anything I have the “stones” to try, runs right with all my friends (except Jogon30's new YXZ), and has been very consistent and trustworthy (yes I said that). I need to quit screwing with this thing and just put some miles on it. Besides, I think my only issue with speed reduction comes from first, my loss of 20%+ power at this altitude and the addition of new windshield pushing it past it’s ability to hit the limiter. So what? This is just a Chinese copy of the RzR 800 with a modified copy of the Rotex 800 engine. If I wanted a bad-ass machine, I would have bought one of the many 1000s out there..but I didn't want or need something like that.

Ok, thought over...carry on guys! 

[chuddly]

LOL...I get what your saying NMKawierider.  But as for me I like to modify things and get absolutely every bit of performance out the something that I can.  Nothing wrong with either mindset.  Its just how I am though. 

I agree that port and polish alone wont make a big difference but with the air filter and opened up exhaust and EJK it will help.  Plus to port and polish a head is only time for me...not really any money other than a gasket or 2.  My point about the clutching is that you can spends months or years trying to get it right and even then its marginal gains at best.  And at that point you dont know if you have done something to compromise the reliability of the machine due to more heat build up or chewing up belts or any number of issues.  I have plans for mine in the spring that is HAS to be ready for and spending the next six months or more on it to try to get that little bit of extra is not in my timeline.

[Hrc630]

I agree with both of you ! Exept the port and polish as porting on 4 stroke engine do close to nothing if you dont spend A LOT of money in high compression piston, bigger valve, high lift camshaft and full exhaust and intake.

A porting wont add anything over a slip on and a EJK (witch are very basic in fuel control capability).

But i think i am really like you Chuddly and i try to extrac all i can from my machines and its a Real passion.

I am with you also NMkawierider and you have 100% right with the ZForce 800. For an entry level machine my CF do exactly what it supposed an it is for sure the strongest and fastest 800cc in the
market so we can't complaint. It is as reliable as the Can Am, Polaris or Artic Cat and the value is better.

For me its a toy and I like trying to extrac every hp/mph I can as much as riding.

I have close to 4,000km without any trouble so I trust and like it a lot.

[davidpaul]

Just my thoughts for the day. As I was putting mine back together from checking out the tank filter...and finding nothing I thought "WTF am I doing here?" So what if it only does 63-65 or so, the most you can do on forest service roads is 35.. legally. I hardly ever exceed 45 on.. anything.. normally. This thing wasn't bought for use as a high-speed desert racer or blowing downs road at 75mph, it was bought for leisurely trail rides with the family, exploring and enjoying nature. It does all that well..and it runs just fine, power's up anything I have the “stones” to try, runs right with all my friends (except Jogon30's new YXZ), and has been very consistent and trustworthy (yes I said that). I need to quit screwing with this thing and just put some miles on it. Besides, I think my only issue with speed reduction comes from first, my loss of 20%+ power at this altitude and the addition of new windshield pushing it past it’s ability to hit the limiter. So what? This is just a Chinese copy of the RzR 800 with a modified copy of the Rotex 800 engine. If I wanted a bad-ass machine, I would have bought one of the many 1000s out there..but I didn't want or need something like that.

Ok, thought over...carry on guys! 

I agree, and I use my for the same purpose I probably don't run much faster than 20mph on the trails enjoying the countryside, 3800 miles on mine now.
When I had mine first I had a lot of jerking and the wet clutch dropping out of engagement at low speed and I thought the clutch delete kit was the way to go, but after changing to a part synthetic motor cycle oil it's now not a problem.
 I have disconnected the O2 sensors and fitted a EJK which has cured my flat spot at low rpm, the engine also seems smother throughout the rev range also runs cooler too (noticeable in the cab) 

[Hrc630]

Just a little update, I have play again with the secondary tension (a little less) this morning and the results are encouraging. I now it 71 mph every time and my engine run 300 rpm lower (7350 at 71 mph). On the acceleration the motor stay at 7100 rpm. I think it's very good for now. The only "stress" for me is that the clutch seem very hot. I am not able to let my hand more than 3 sec.
i don't remember if it's the same with stock clutching??

[NMKawierider]

Just a little update, I have play again with the secondary tension (a little less) this morning and the results are encouraging. I now it 71 mph every time and my engine run 300 rpm lower (7350 at 71 mph). On the acceleration the motor stay at 7100 rpm. I think it's very good for now. The only "stress" for me is that the clutch seem very hot. I am not able to let my hand more than 3 sec.
i don't remember if it's the same with stock clutching??

So what was the setting "before" and what is it "now"? I have mine pulled apart in prep for a CVT filtration mod and it wouldn't be much more from here to ease-back a bit on my secondary. Loosing those heavy doors made some difference...enough that I may go back to B2.

[Hrc630]

Hi, before I was at b2 and now I am back to stock.

I think i will stay like this. 71 mph GPS is ok since I have 1/2 windshield front, full rear back glass, full doors and mud flap.

Do you have pic of your cvt cooling set up ?

[NMKawierider]

Do you have pic of your cvt cooling set up ?

Not yet. When all the parts get here I'll post a How To. I have been using a make-shift domed filter over the intake but it doesn't get it all and it always needs cleaning. I wanted it inside but after months of looking and measuring I gave up and am going to port it out the back like I have the engine intake...except to the far left side. Then I have the option to either just put a variety of filters on it... or slap some 3" 90s on both ports and have snorkels if ever needed.

[swarzeneg]

Consider the pre cyclonic filter. I will install and the steps of the results.

https://www.youtube.com/watch?time_continue=5&v=9Frpuh7JWw0

[gfmoto]

Yet to try to run mine without the front and back windows in, but only had mine up to 55mph. And won't reach the rev limiter.  Also I'm only about 8psi in the front and 9.5 in the rear. Nmk took the words out of my mouth the other day. When it hit me, I never have to go anywhere in my Cfmoto that fast.  ( that's why I have a car ) [other than the thermo switch] this thing has been great to me and for the $8500 OTD price I paid.  +$60 for front & back windows + $45 & $18 in lights + $20 for diamond plate CV Gaurds ....sooooo about $8650 not expecting a racer from it.

[Hrc630]

The ZForce 800 is in the sport segment and it performs better than any -800cc utv. Here in Quebec we have many open trail in the winter so we need a good top speed to are able to maintain about 50 mph for long stretch. It's faster than is rival RZR 800, Wildcat Sport so we don't have to complaint.
You can't compare it to the open 1000cc category but for the 800ccc and less it perform very well.
With 71 mph gps, it's ok for me