You know, I see this as a great way to see what the differences are from lowest to highest elevations where the bike is ridden.

It would even be more interesting to try the Dial-A-Jet fuel adder with something like the A/F meter since they recommend jetting lean then allowing the DAJ to add the needed fuel. One of the uses the ATV and sled guys do is jet for the high elevation, which will go lean at the low elevation, but with the DAJ it will compensate for a good chunk of the altitude change. The A/F meter would show yay or nay, indicating results as the elevation drops. This could be a good thing for those who may vary elevation by several thousand feet when riding. The Thunder Product site has both media and personal comments on doing this. It would just be interesting to know what the gauge shows.

 

Got my suspension back tonight! Tomorrow I'll go to work early in the morning and get my junk back together...then ride!

I'd consider trying a Dial-a-Jet, that might be the ticket for huge altitude variations. Or maybe getting the bike tuned for sea level and remove the lid for higher elevations. Are there any other needles or jets that are worth trying or act differently than the DJ kit?

I did try the MCM months ago and had mixed results...depending how curious I get I might just have to try it again. I could never quite get the carburetion how I liked.

 

I was thinking similar - remove the lid for higher elevations.
Anything should be better than stock.
When I first got my bike, did a DS ride with some friends out of Virginia Lakes(9k ft).
We did a loop into the Sweetwater range and over Mt Patterson(11.4 k ft).
Had fan the clutch on some slow hairpin turns near the top to keep the bike going and stay in the meat of the powerband. Bike was stock except for a couple shims under the needle & more turns on the mixture screw.
Would be nice to try that again with current mods.

 

one person I know made this adapter to insert into the exhaust tip
works fine



I was told to keep max reading around 12.3-12.5 or so for best performance
so thats what I was shooting for
https://www.youtube.com/watch?v=Sp8ButBIMs0





one person I know just threw the o2 into the end of the exhaust and strapped the wire to the muffler, the protection on the wire is pretty heat resistant
and it seemed to work just fine that way

I wouldnt do any long rides with it like that, but for quick run down the street worked good

 

So...this is TOTALLY preliminary but I got everything hooked up and ready to rock. Took the bike for its first "test'n tune" ride and to my surprise the bike is kind of decent already. Crap, now what? Well...MORE RIDING!!! I'll have to really pay attention and see exactly how the bike behaves in different situations. So far it idles around 14.5-15ish, on decel it goes pretty lean as with rev matching and down shifting. Under WOT it goes down to the 11-12 range and depending on the rpm the ratio goes to the 13's. Under cruising its all over the place, mostly around stoich or lean, around 15 or so. Again, the meter can be very steady but its also instantaneous for responsiveness so it makes it tricky to know exactly how much my right hand keep influencing the readings. I only have a helmet mount for the gopro and unless I'm looking down it might be kind of hard to make out any readings, so I might have to invest in a chest mount or rig it up on the bars some where. I'll keep updating data as my riding progresses...wish me luck!

Home brew bracket...

Rigged up a ground control manual switch, since this isn't really a permanent device I didn't want to tap into the ignition wiring on the bike.

I was afraid of the heat soaking the rubber boot for the intake so I had some fancy heat shielding laying around from an old Audi engine.

Janky, I know, but hey...it works!

There she is...time for info!

 

I dont know anything how these work
but from my little uses on a few carb bikes it seems its normal for it to lean out off the chart when letting off the throttle, or blipping it
because if you think about it, now no fuel is going through the engine and will make the meter show that lean condition

if you ride slow and steady you can get an idea of the levels my bikes seem to be in the green zone of my meter


but if you ride hard, shift fast letting off the throttle it will bounce around and change alot







So using the meter does help a little when cruising around I guess as long as your in the green zone its not too lean and you get an idea whats going on

I would love to install this on a FI motorcycle
I have used it on a FI scooter but those are different they dont shift so the readings stay pretty steady until you let off the throttle or at idle

 

Yeah, I'd be curious as to how consistent the fuel mapping is through out all the load ranges and throttle positions on an EFI bike.

I went for a nice little ride up in the hills just now. So, while I do enjoy to ride my bike hard and do a lot of gear changing I don't really tend to rev much past 8k at all. Sometimes I'll go for a good stretch, especially if I need to get back into a good power band in the next gear like if I anticipate a loss of speed during a change up hill or in the dirt. My spirited ride up in the twisties had a lot of up hill, I noticed even in 4th gear around 5.5-6.6k rpms the bike had plenty of power but if I was cruising up hill, heavy load close to WOT the ratio would drop to 10:1 or so...if I slightly back off with out loosing much acceleration it would go to a nice 12-13:1 af ratio. Kind of interesting. I wonder how much of it is related to jetting or rider induced. I'll go to a few better spots later on and take the revs higher. I anticipate the af ratio might clean up a bit and go closer to 13:1 if I let the rpms climb and the engine load got less strenuous as the revs got higher.

Just for the books right now I'm running a filter sock and its a bit dirty from my last adventure, I'll be taking it off and only running my Twin Air air filter and keeping track of the results. Soon as I really start trying to log some data I'll be sure to keep things consistent and post all specs at the time.

 

I've been riding every day but I've been busy so I haven't really had time to fiddle or "go for a ride" how I want. Non the less I've been getting use to how the set up acts and so far everything seems logical with the A/F. I pulled out my disgustingly dirty filter sock that in all honesty I'm ashamed to post photos of. I know, I'm a mechanic too but hey, the cobblers kids have no shoes. I did notice that after I pulled it out my bike no longer touches the mid to high 10's for A/F ratio. I was about to explain my plans to go for a ride this weekend but I decided not to, plus I think I've already explained to much and may have jinxed myself. As for now I've been working on trying to get my go pro mounted in a way that I can document the RPMs, MPH, A/F ratio and maybe a little bit of the road so its not so boring. Helmet cam is out of the question for sure so I might resort to making a bracket or getting a chesty mount.

As for now, here are some dirty photos...

You filthy bastard






The back side, this thing works surprisingly well.