[mac102004]

The Hondamatics could be different from ESP to Auto. I doubt the Rincon or the DCT transmissions are. When I had my 650 Rinny I never found any difference between auto and ESP but I always ran ESP since I hated how the auto shifted. I want to say the RancherAT is geared higher than the Rubicon in high range but I'd have to look at the ratios to be sure on that.

 

[mac102004]

Here is the final ratios for the 420AT, 500Foreman/Rubicon FM, and 500 DCT in both High and Low. I don't trust the numbers Honda gives for the DCT they just seem too low geared and it doesn't make sense to me. If I punch the numbers into a potential speed calc thing stupid thing should only do like 31mph at 7000rpm lol Compared to if I punch the the numbers for the FM into the same calculator it spits out 49.3MPH or 79.4KPH which is right about where I would expect it. (420AT says 49.0mph). So compared to the FM Foreman anyway, the 420AT is actually geared LOWER in 5th, but by less than 1%. The "potential" speeds are calculated on a 25" tire in 5th gear at 7000rpm, different tire sizes and actual engine RPM's will change that, as well as about 70 billion other factors....

420AT 10.61
500FM 10.55
500DCT L 23.85
500DCT H 16.57

 

[Laidback]

I spoke to service at the dealer and he told me to put more miles on it to see if it gets better. I then called my buddy up in Edmonton and he took his in and had the valves adjusted. The clearances were to tight. He said he gained almost 5 mph and said it pulls more stronger than before. I think this could possibly be my issue.

 

[Laidback]

Well I went ahead and checked valve clearance. Was 6k on intake and 8/9k on exhaust which I read is within specs. Warmed up the quad real good and did a compression test knowing that it has a decompression. I have 2 compression tester.s and both showed 80/83 lbs . Kind of low if you asked me. I thought it would or should be closer to 100.

 

[alloutdoors]

By chance are you a big person, because weight contributes heavily to speed?

 

[mac102004]

Well I went ahead and checked valve clearance. Was 6k on intake and 8/9k on exhaust which I read is within specs. Warmed up the quad real good and did a compression test knowing that it has a decompression. I have 2 compression tester.s and both showed 80/83 lbs . Kind of low if you asked me. I thought it would or should be closer to 100.

That's about right, the 500 has a auto decompression mechanism on the cam for easier starting, so you'll never see a high reading on it, I think off the top of my head that around 75-85 is well within specs.


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[Laidback]

By chance are you a big person, because weight contributes heavily to speed?.

I am around 240. Avg for most guys that I go riding with.

 

[alloutdoors]

By chance are you a big person, because weight contributes heavily to speed?.

I am around 240. Avg for most guys that I go riding with.

You should be getting more speed and hopefully you can get it figured out.

 

[Laidback]

I spoke with a couple guys in my surrounding area and they are running fuel controllers. So I decided that I am going to order a EJK 3.5 from Dobeck just to clean it up a bit richen/remove where it is needed. Don't really need the exhaust changed.

 

[mac102004]

I like the PCV better than the blinky boxes that's just me. Easier to tune on a laptop, timing adjustments etc. Little bit more money though. I figure if you bought it with the autotune you could put the wideband O2 sensor in the same bung as the factory sensor, although it's not ideal placement.....


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[Laidback]

I would like to get a PC5 but nothing available at this time.

 

[mac102004]

Is there one listed for 2015 or 2016? Those will work also.

 

[mac102004]

I was just looking at it and they have nothing listed. But I'm pretty confident that the one for the 2014-Current 500 Foreman will fit. Confident enough that if I was buying one I would buy that, but not confident enough that I will tell you to just buy one without doing some more research on it first lol if ya know what I mean. The P/N for the 500 Foreman and Rancher is the same, they use the same PCV...

 

[Laidback]

This is the first Honda Rubicon atv that I have purchased. I am going to take the AFR setup from my sled and install it on the Rubicon and just see exactly for myself what the afr's are at from idle right through to WOT. Document it and make a decision whether to purchase EJK,HMF or PC5. I will post results when I get the info.

 

[Laidback]

I did research on the PCV.
Powercommander V (Fuel & Ignition)
Part Number: 16-060
The map they have is from a 14 model. I still am going with the afr and monitor the results.

 

[mac102004]

Yeah for sure, that's the right way to do it. I am curious what the AFR is like on the Rubicons in factory form, I suspect then are tuned fairly lean to meet emissions. So definitely post up your results.


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[Laidback]

2017 AFR Results

I did research on the PCV.
Powercommander V (Fuel & Ignition)
Part Number: 16-060
The map they have is from a 14 model. I still am going with the afr and monitor the results.

Finally got time to install AFR on my 2017 Rubicon Deluxe 500

I got time to go for a ride and monitor my afr results.
Here is what I got for numbers.
Cold start 12.8 then warm up got to 13.8 before I started riding.
Driving. Did not matter what gear you are in and cruising afr is 14.67up to 15.88( Lean but would prefer 13.8+/-)
When I gave full throttle (auto) 1st,2nd.3rd,4th afr richened up to 13.1-13.4but got up to 14.5+ quickly. When I got into 5th afr wide open throttle @ 12.8-13.0

Next I am going to put on my EJK and see if it will make any difference. Just want to richen it up a little to have the
engine temps a little cooler. Maybe a little more bottom end power. I am going to set my EJK using my afr gauge and have a good run.
Will post results when done.
PS: I love the ride and handling on this quad. Bottom end torque is fantastic. Pulls strong.

 

[ATVTogether]

This thread is very helpful, thanks for taking the time to share this. I was debating on going the HMF route, but I am curious to see the results of your testing.