Fuel mileage Apex VS RX-1, and Vector

[trucknut]

Does it really matter,I mean its fun to pick on your two stroke buddy's if they ride gas hogs but nobody needs a snowmobile.These things a rec vehicles,they are total money pits.I have a rage It gets great milage for a sled but my 8000 pound ford powerstroke that I drive 25000 miles a year gets just as good of milage. I am more concerned about the milage my truck gets that I use every day than a sled I put 2000 to 3000 miles a season on.Its nice to be on a four stroke,I spend less at the pump,I don't spend as much on oil,and my savings over a two stroke gets me a free dinner every night but if yamaha didn't make a four stroke or I liked a sled that got 10 mpg instead of 17 I still would be riding unless I could not afford to because these thing are a very expensive hobbie,not a nessesity.

 

[Riceburner]

Sledfreak is correct. Yammie odometers are accurate.

I have checked my Warrior odometer against two GPS's.

Odometer was within 1 % on both GPS's. I would say the extra
1% reading on the sled was likely due to track spin. Now the dream meter,
thats a different story.

Re MPG. Rode the Warrior on the weekend and wife rode the Apex GT.
Probably an average of 5/10 ths riding on loose snow for an average. [ Trail riding, 40 to 70 mph most of the time with some 100mph blasts and 10 runs down a drag strip]

I got 19.5 MPG on the Warrior and she got 18.5 On the GT. [ both to an Imperial gallon ] [16.25 and 15.4 to the Yankee gallon] Warrior would have been ridden harder on average.

Racing on snow at the dragstrip, The Warrior would pull ahead about 1 length off the line and the GT was 3 to 4 lengths ahead at the end of 660 ft.
The Apex rocks.

She is not unhappy that she burns a little more fuel when she can kick my #*$&@. wife LOL

As the old aying goes, "Speed costs money" In this case it looks like 10% more HP is going to cost 10% more in fuel costs. Seems fair to me !!!!!!!





Dave

 

[hlmrx1]

Don't forget that the speedo is off by 15% or so, so mileage is not as good as what it seems. My stock RX1 without the speedo correction does around 18 miles per imperial gallon and my RX1 Turbo with the speedo correction (actually a little under), does 15 miles per imperial gallon. Ride them hard and it drops from there.

Just the speedos are off, not the odometer.

If that's true, then there must be two pick up sensors!!! I have modified the sensor (gear) on the one RX1 and not the other. Next ride we go on with these two machines, I will take note of the odometers and we'll see.

 

[Sledboy]

How do you remap the fuel injection?

 

[87gtNOS]

How do you remap the fuel injection?

You don't. It will most likely, (well not like it would ever happen) be a replacement ECU.

 

[turboseamus]

I dont know about Yamaha snowmobiles, but I dont think there is a car/truck being sold today that the Engine computer cannot be upgraded. Simply a matter of downloading the latest software into it. I know you can reprogram Harley EFI. I think it would be foolish for Yamaha to not have an upgradable ECM.

 

[craze1cars]

I remapped my Chevy truck 6.0 L fuel curve/ignition timing with a few key strokes after spending $300 on the right software. Result was about 10% better fuel economy and 10 to 15% more hp & torque without even having to open the hood....still on 87 octane. This stuff isn't rocket science, it's just computer programming...as soon as the aftermarket companies recognize there is enough demand, they'll develop a way to get it done for those who want to pay for it.

Wasn't there somebody on this very site about a month ago who was experimenting with remapping his Apex with the help of a dyno? Maybe it was Supertuner? I can't remember...

 

[87gtNOS]

How do you remap the fuel injection?

You don't. It will most likely, (well not like it would ever happen) be a replacement ECU.

Again, our EFI Yammys are very basic still....not like the Ski-doo or Polaris systems....

 

[welterracer]

Don't forget that the speedo is off by 15% or so, so mileage is not as good as what it seems. My stock RX1 without the speedo correction does around 18 miles per imperial gallon and my RX1 Turbo with the speedo correction (actually a little under), does 15 miles per imperial gallon. Ride them hard and it drops from there.

Just the speedos are off, not the odometer.

If that's true, then there must be two pick up sensors!!! I have modified the sensor (gear) on the one RX1 and not the other. Next ride we go on with these two machines, I will take note of the odometers and we'll see.

Nope there is only one senser!

The sensor sends its signal to the computer and the computer tells the speedo what speed to read.. YAMAHA built in the extra 10% on the dreammeter on purpose!

But the odometer is dead on..

 

[hlmrx1]

Interesting, so my odometer on the one I modified will be out then and my speedo is on. Man why can't Yamaha fix that, I mean they know that everyone knows there out by 10%. I know it does feel faster when you see those numbers!!!!

 

[craze1cars]

'tis not just a Yami thing. We did some experimentation with a bunch of Doos and a Polaris on my last trip with a GPS in our pockets. On a typical railroad grade run the speedo needle would cap out right at 100 mph, but the GPS would record 91 as a top speed. Yet at the end of day the trip meter on all 4 sleds varied from 203 to 206, and the GPS trip meter said 201.6...which was MUCH closer than the speedo was reading. No Cats in our group so I can't speek for their speedos/odos.

 

[170plus]

i have never seen any posts on the barametric pressure readings on the guage pod on the sleds,i live in northern maine and right in my back yard i got 28.76 the morning i left for quebec,when we got up to rimouski right on the st lawrence river it read 29.18,the next day up in the mountains north of st an de mond it was as low as 26.98,then back up to 29.18 when we went into cap chat to gas up,my mileage was 16-18 mpg the 1000 mile trip,i'm curious as to how different areas of the country (higher elevations) compare,the less air pressure the less mpg i would think even though the efi should adjust but it still wont get as good mileage as being right at sea level

 

[APEX 21]

Well if it's possible to do some reprogramming and keep the reliability/warranty, I'll be glad to pony up the cash.

 

[sfraser]

Don't forget that the speedo is off by 15% or so, so mileage is not as good as what it seems. My stock RX1 without the speedo correction does around 18 miles per imperial gallon and my RX1 Turbo with the speedo correction (actually a little under), does 15 miles per imperial gallon. Ride them hard and it drops from there.

Just the speedos are off, not the odometer.

If that's true, then there must be two pick up sensors!!! I have modified the sensor (gear) on the one RX1 and not the other. Next ride we go on with these two machines, I will take note of the odometers and we'll see.

Nope there is only one senser!


Hmmmm Last weekend I did a 500 Km trip. I had a 4% difference between my GPS and odometer. So some odometers are off a bit.
My buddy was driving a 2000 Vmax 700 and I was getting about 20% better gas mileage than him.

Cheers,

Scott

The sensor sends its signal to the computer and the computer tells the speedo what speed to read.. YAMAHA built in the extra 10% on the dreammeter on purpose!

But the odometer is dead on..

 

[GT man]

Does anyone know if any of the performance shops have used the BOONDOCKER programmer that the sell with the NOS kits. I have read that this unit can be used to reprogram your sleds fuel delivery but i am almost sure you need a dyno to do it.