welterracer
TY 4 Stroke God
Now thats funny steve!!
MightyWarrior said:
I tried telling that to the guys riding Harley's when they seen me putting in regular. They would not believe me they said the premium gas burns better and wont soot up your engine so bad cause it burns cleaner. I just kept running the regular and my bike just purred the whole time while theirs rumbled and shook mind you it is a Yamaha. Does anyone know if the higher octane does burn cleaner or just hogwash. Whoops maybe I shouldnt say that flyingpig might read it. lol
rightarm
TY 4 Stroke Master
How many miles/kms on your motors so far with the numbers you guys are getting.
flyingpig
Expert
Yes I read it! I think your right its just pigwash! LMAOSled Dog said:
yamaouch08
Expert
..
I was in the U.P. of michigan in the middle of the week no traffic perfectly groomed trails and going about 55-115mph I stopped and got gas and trip meter said 82 miles I filled it back up to were it was when I left that morning and it took 4 gallons. so figure it out I would say 4x20=80 = 20 mpg :ORC
yamahey
Extreme
Yes, you can get close to 20 in good conditions on groomed trails. I am consistantly in the 18-20 range on my 03 RX-1. I get less than that (about 15) with my 04, but that has filters and is clutched and stretched to 136", and I am always hammering it because it it so much fun (thanks Jason!!). 
My brothers 05 Venture consistantly gets around 20. The 120 engine does better than the 150.
My brothers 05 Venture consistantly gets around 20. The 120 engine does better than the 150.
BLACK REV 800 X
Newbie
I had a GT and got about 13.5.... Now with my new 800 Power Tech I'm getting 18...
I really wanted to love the 4 stroke, because that is what it had going for it and especially why I snow checked it....
I'm not brand loyal, but Yamaha needs to copy the very forward riding style of the REV and lose 75 lbs...
I really wanted to love the 4 stroke, because that is what it had going for it and especially why I snow checked it....
I'm not brand loyal, but Yamaha needs to copy the very forward riding style of the REV and lose 75 lbs...
SledFreak
TY 4 Stroke God
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Unless, your running anything other than good wide flat groomed trails, than I'm not sure why you did what you did, because my GT handles, rides and feels everybit as light as my REV 800. I know it's not, but unless you are riding very rough, sharp twistie trails, I'm not sure how you can notice the difference. I know all I ride is groomed trails and I can't tell at all. It pulls everybit or harder, than my REV 800, except on top (but I believe it's clutching, I'm over reving). Good lucl with your REV, you'll especially need it on that motor.BLACK REV 800 X said:
jds1000
Expert
BLACK REV 800 X said:
I think you should have kept the Gt to tow your Rev when the engine blows!! You had the GT for 300 miles, thats not anywhere near broke in and you probably never had it dialed in either. As far as the gas mileage goes I have a 04 800 Rev and my wife has a 05 600 SDI. I only have 220 miles on my Apex but my last ride with my wife we used just about the same amount of fuel and she weighs half as much as I do. Black Rev 800X, doo you hear that ticking noise? thats your Rotax engine counting down to the day she blows! I hope for your sake your close to home and not on a vacation with it because nothing ruins a vacation better then the sound of a Rotax going down
03viperguy
Extreme
little harsh there boys, this aint amsnow!
snowbeast
TY 4 Stroke God
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Hi freak did you think your rev had more top speed than your apex does?? reason i ask is we both ran the new powerteck 800 06 rev last weekend on sloopy trails in washburn maine on trail 105 its a rr bed,and we ran about 1800 ft,give or take,the snow was just starting to stiffen up a little,as it was 45 degrees all day and by the time we raced it was down to 33 or so,my bud went first on his clutched gt and lost the hole shot and was down 5 sleds when they drove by,next they came out togeather and preety much stayed even,than i raced him bone stock rtx w/me on it i weigh 240# the guy on the rev 190# i ghole shotted him and pulled on the midrange,than i see him real mein on top,by 4 sleds,we stop and my little buddy who weighs 160# races him on his rev and the guy from the rev rides his gt,dead even now,so i guess its preety close afterall,but we still dident race top speed,but the rev was the best running one i have seen i a while,and he said it only had a dynoport can or pipe and clutched,so it might of been a can but than again it could of been the pipe instead,who knows we never looked,just know it went real good and went thru the big stuff great,as the gts need the 5.5 rear spring..SledFreak said:
iasledder
Expert
welterracer is absolutley correct on octane burn rates. You use higher octane only when compression ratio is high or spark is advanced to get closer to "ping" or to say another way, just stay under "ping"
SledFreak
TY 4 Stroke God
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mnmsnowbeast said:
I'm not sure if my REV was faster on top or not, because I'm just starting to run my hard now. I will be top ending it by next week. I got a good sport that is a portion of a groomed trail, which is a road and it's 5200 ft. This is a snow condition and not ice, so it won't be the optimin run. When the season gets late, I will really see what it does as condition tighten up. I could go and run it on the ice, but I don't believe that is a true indication, because I don't drive everyday on the ice. So I will know when I run it on the snow. My gt is strong out of the whole, but I think my REV might take it mid to top. Not sure. The guy who bought it form me did the exact same mods that I did to the motor before I blew it up. But without touching the internals of the motor I had it running pretty good. It was clutched, geared, 120 1.175" studs in a 1 track, reed spacers and Boyseen pedals and a Cudney head. It was strong. My GT seems to run as strong, but I think it just seems to lay down near the end of the run. Just for record, in my other post about me racing my buds F7, I would beat him anywhere with my REV. I think my GT is fast, I just need to see why it's got the breaks on, on the big end. Is the motor and chassis still tight?
I would like to buy a clutch kit, but with all this confusion on who works and who's doesn't, I'm waiting to find out what the verdict is before I buy one. For now, I would just like to fine tune the stock clutching, if I can.
yamaouch08
Expert
BLACK REV 800 X said:
Good luck with that 800 Power Tech...I don't know where your 13.5 MPG came from...I got 18 MPG at 300 miles, at 700 miles I get over 20 MPG...you should have broke it in as the manuel stated and gave it a chance, it's the baddest sled out there!
I also had to tow my buddies 2006 800 Rev Power Tech and I think I was getting about 15 MPG for 50 miles. Point: Keep the Yamaha for towing the Rev's ring engine problems!
:ORCcastlerep
Newbie
- Joined
- Aug 18, 2005
- Messages
- 1
The reason for the lower octane is to allow the the engine to run hotter.Why? Emmisions! Lower octane burns slower and allows heat to build up. High octane has a fast burn which is cooler.( run your hand through a flame at a fast pace vs. a slow pace which gets hotter?). The reason for running the engine hotter is it runs cleaner. This is why cars have catalytic converters to build up heat (rumor has it that eventually sleds will too). I have heard that those doing fuel remapping are finding more horsepower by actually riching them up. and running cooler. I would Have to believe Yamaha has these things leaned out as safe as they can for emmisions. I know it does not answer any fuel mileage ?'s but at least the the reason for the octane rating
