mork110
Extreme
Groomerdriver said:
Groomerdriver thank you again for your response
I will go get a second opinion on the carbs I guess at a bike shop as there is one 1 Yamaha dealer close to me
I checked the 2 tail pipes and there is black soot in them is this normal or is it running rich??????
Could it be electrical in the ignition system as I am at a loss and will try anything!!!!!
Groomerdriver
TY 4 Stroke Master
mork110 said:
I would have your carbs pulled and completely disassembled. Same with your clutches. MY tail pipes are black too....always have been. I think these sleds do run a little rich, but I'm not going to mess with the main or pilot jets or anything else. Too little to gain and way too much to lose.
fasteddie
Extreme
I was getting 12 mpg on my 06 vector at the start of the year and went through what you are going through trying to figure it out, it's frustrating for sure.
It turned out after checking everything it was one of the carbs. I discovered this by looking at the spark plugs. I pulled them and 1 was burning way richer than the other 2. I took it to the dealer and he found that one carb was actually missing a part from the needle assembly, and fixed it for free seeing that he cleaned them last.
Check your plugs and they will tell you what your carbs are doing.
Good luck
It turned out after checking everything it was one of the carbs. I discovered this by looking at the spark plugs. I pulled them and 1 was burning way richer than the other 2. I took it to the dealer and he found that one carb was actually missing a part from the needle assembly, and fixed it for free seeing that he cleaned them last.
Check your plugs and they will tell you what your carbs are doing.
Good luck
twomorestrokes
TY 4 Stroke God
fasteddie said:
Good point!
mork110
Extreme
twomorestrokes said:fasteddie said:
Good point!
I keep checking the spark plugs after each drive and they look white not even a light brown
Could it be electrical I have now notice that tail light does not get warm enough to melt the snow on the lens is this normal never really checked before and my hand warmers do not work when driving 3/4 or more throttle but ok at slow speeds ( the hand warmers have been like this since it was new) I feel like I am
Groomerdriver
TY 4 Stroke Master
mork110 said:twomorestrokes said:fasteddie said:
Good point!
I keep checking the spark plugs after each drive and they look white not even a light brown
Could it be electrical I have now notice that tail light does not get warm enough to melt the snow on the lens is this normal never really checked before and my hand warmers do not work when driving 3/4 or more throttle but ok at slow speeds ( the hand warmers have been like this since it was new) I feel like I am
If your plugs are white, me, myself and I would not even run the sled anymore until dealer #2 takes checks it over.
twomorestrokes
TY 4 Stroke God
Man, that doesn't make sense. If it's drinking fuel that bad the plugs should be dark...unless there's a good vacuum leak? At least you don't have to worry about burning it down like a 2 stroke.
Groomerdriver
TY 4 Stroke Master
twomorestrokes said:
Mike - just askin' -- why couldn't a 4S melt a piston or something? Or is it you get such a lean condition that his plugs are white, it just keeps drinking more and more gas to keep it from melting?.
Wouldn't his engine be running mega hot?
twomorestrokes
TY 4 Stroke God
I suppose you can melt a piston in a 4s engine if you were lean enough to cause some serious detonation. It would not be nearly as common as with a 2s due to lower combustion temps and no oil required in the combustion chamber, but it is possible. You're right, lean conditions do cause more heat.
from TMS...
4S peak flame temp (combustion temp) is higher than 2S by much.
However, having an extra rev to cool down makes the 4S less prone to melt down due to lean charge.
4S peak flame temp (combustion temp) is higher than 2S by much.
However, having an extra rev to cool down makes the 4S less prone to melt down due to lean charge.
twomorestrokes
TY 4 Stroke God
I guess we're trying to say the same thing but you said it better. The 2s fires every stoke so combustion CHAMBER temps remain higher. Plug and cylinder temperatures remain lower on the typical 4s engine as it has an extra stroke without combusion that allows it to cool.
I was reading an article in that had the following interesting information concerning combustion CHAMBER temperature:
"Fact: 4-stroke engines only fire every other stroke, vs. every stroke by a 2-stroke engine. Firing, or combustion, burns fuel, which creates heat. Logically, it may be deduced that if there is fire in the chamber only every other stroke, the engine has time to cool off a bit between combustion cycles. Let’s take that a little further: Using a hypothetical 4-stroke engine turning 10,000 rpm = 5,000 combustion cycles per minute, vs. a hypothetical 2-stroker turning 13,000 rpm…with the same number of combustion cycles per minute….the gap widens. The 2-stroker has 160% more combustion cycles than the 4-stroker. Even though this is partially offset by the fact that at least some 4-strokers have a higher exhaust gas temperature, the message is clear: 4-strokers remain cooler, and need less oil."
Mike
I was reading an article in that had the following interesting information concerning combustion CHAMBER temperature:
"Fact: 4-stroke engines only fire every other stroke, vs. every stroke by a 2-stroke engine. Firing, or combustion, burns fuel, which creates heat. Logically, it may be deduced that if there is fire in the chamber only every other stroke, the engine has time to cool off a bit between combustion cycles. Let’s take that a little further: Using a hypothetical 4-stroke engine turning 10,000 rpm = 5,000 combustion cycles per minute, vs. a hypothetical 2-stroker turning 13,000 rpm…with the same number of combustion cycles per minute….the gap widens. The 2-stroker has 160% more combustion cycles than the 4-stroker. Even though this is partially offset by the fact that at least some 4-strokers have a higher exhaust gas temperature, the message is clear: 4-strokers remain cooler, and need less oil."
Mike
grubf
Pro
- Joined
- Dec 9, 2008
- Messages
- 147
- Reaction score
- 34
- Points
- 713
I bought an '07 Vector partly because of the wonderful reports on fuel economy. Although it is probably possible to get into the 20's (US gallons) I am finding that the middle teens are much more common if you are holding it to the pins most of the time like I have to when I am riding with my buddies with 800's. There is nothing wrong with my Vector - the plugs are fine and it is taching at 8500 and the track is very loose. I can handle the not quite as advertised fuel mileage because it is supposed to be similar in power to a 600 and I give the 800's fits. ('09 800 Pol Switch,'08 800R Doo) Still, I think I will go back to an Apex next year because the weight difference is just not that much and the mileage is actually very close.
Groomerdriver
TY 4 Stroke Master
grubf said:
Can't believe everything you read on the internet!!! I'd like to ride with some of the people who say they get 20+ mpg consistently. If you're heavy on the throttle like I am, you're pretty much right on mpg wise IMO.
twomorestrokes
TY 4 Stroke God
For some reason, these sleds seem to vary somewhat as far as mileage goes. I seemed to have gotten lucky with mine. It really burns my friends at the gas stations but I do in fact ride it hard usually and average 20. I rode it hard right from new without taking it easy for break-in.
az99
Pro
- Joined
- Oct 3, 2004
- Messages
- 186
- Reaction score
- 0
- Points
- 566
I consistently get 20+ MPG with mine but that is riding Quebec well groomed trails at 50-60 MPH for hours . When I ride regular trails with stopping to cross roads, tighter trails and more lake wide open runs mid teens is sure more realistic.Groomerdriver said:
