I was reluctant to attempt making these changes because of the difficulty NMK had getting the nut off of his secondary, but I decided to give it a try and I am sooo glad I did. Like him, my primary came off with a breaker bar but I couldn't get the nut off of the secondary even with a long pipe on the breaker bar, fearing the worst I loaded it onto the trailer and off I went to my quaint local repair shop and the owner had a small almost cute little impact that had 450lbs of torque and it just fit between the frame and the nut and without using the spanner which I had welded together the impact wrench pulled the nut right off, we did use the spanner when we torqued the nuts back on.

I set the secondary to C1 as Cosmosdan had suggested and installed 25g Dr. Pulley Sliders and I am not sure what did what but it is like a different machine, literally night and day difference. I only had time to run a few miles with it but just heading up my steep driveway about 150 feet long I could instantly feel the improvement in  in the low end torque, ran along some flat dirt roads and I didn't have a section long enough to see what top speed was but it hit 45 pretty quick and it had more to go, anytime I punched it I could feel the difference in the low and midrange, the last test was a long hill approaching our house that I will guess is about a 30 degree incline, in the past my machine would not backshift and would just proceed up the hill losing speed and RPM's all the way to the top, not today, today I was actually gaining speed up the hill and had to ease up on the gas as I approached the crest because you can't see over it and I was worried that someone else might be coming the other way. 

My belt which has 2500 miles on it is in good condition, the service manual says to change it when the width is 33.5mm or less and mine was at 34.9, I don't know what the width is of a new OEM belt. My primary was packed with hard build up, I guess it was baked hard because of the heat, a garden hose wouldn't even begin to loosen it up I actually had to scrape the dirt out with a screwdriver.

I am at low elevation 500 ft or so and just installed 27"x8.50x14 LT tires I am not sure what the Abuzz tires weigh but these tires are 26.5lbs each and I would guess maybe 5 to 7lbs. heavier than the Abuzz. I stood one side by side with the 26" Abuzz which is worn out and they are about 2.25 inches taller than the Abuzz so I wonder what the actual diameter of a new Abuzz tire is.

[2015 Z Force 800 53/Trail EPS]

Good. Glad it worked out. I like the term you used "like a different machine"   I think I said the same thing somewhere...lol And its so true. Enjoy.

Like I said not sure what helped the most but I assume reclocking over the sliders, it really jumps out when you punch it.

[2015 Z Force 800 53/Trail EPS]

Like I said not sure what helped the most but I assume reclocking over the sliders, it really jumps out when you punch it.

Lol..it's a team-effort. Both are just good together.

I don't know if the Z6 benifits more because it is so undered powered in comparrison to the Z8. I put the larger tires on at the same time, I would think the improvement would have been even better with the smaller, lighter tires.

[2015 Z Force 800 53/Trail EPS]

I don't know if the Z6 benifits more because it is so undered powered in comparrison to the Z8. I put the larger tires on at the same time, I would think the improvement would have been even better with the smaller, lighter tires.

Yeah it would have but enjoy it like it is for now. Next time you are in there might try B2 just for the heck of it.

More then happy, I like the larger tires with a little more ground clearance. Now that it has been opened up and lubed up it won't be bad at all to try B2  down the road some time. Everyone who owns one of these should invest $70 for slidersand make this mod.

Happy to hear. Every time I open the clutch cover, it is just nasty in there. It is better now that I put that prefilter on, but moving the intake is about the only way to keep it cleaner. Snorkels are not legal in my state, so i'm at a loss what to do. Some guys do whatever they want and never even see the law. Me, I swear they have me lowjacked.

Where did you do the prefilter, I just moved the intake behind the drivers seat and put a filter on it, we are in our rainy season so I need to wait a while to see how it works out. It was a mess but being 5 years old and not having a filter at all I guess it wasn't to bad.

I just put it over the OEM intake. I do remember you putting it behind the seat. I went looking for it, but didn't find it. You should be a lot cleaner next time you have to go in there. I bet most of the dirt was from before.

I just put it over the OEM intake. I do remember you putting it behind the seat. I went looking for it, but didn't find it. You should be a lot cleaner next time you have to go in there. I bet most of the dirt was from before.

I have hardly driven it since I put the filter in so all of it was from before, I was surprised at how hard that caked dirt was. I don't think my riding conditions are near as dusty as some on the forum, we are always riding alone never eating someone's dust in front of us so I am hoping this works out for me.