sled of the year...

[Bakemono]

I'm not sure if a 2 stroke can ever have the reliability of a 4 stroke

I think there are some people who own Yammies with 600/700 triples who would disagree with you on that one. Its not unheard-of for a triple-cylinder Yamaha to have 15,000-20,000 miles on it with very little problems (certainly none related to the engine).
Cap'n

 

[Tork]

Yes we have had many trouble free miles on Yami and other brand 2 stroke sleds. A two stroke depends on intake charge (air,gas and oil) coming thru the crankcase (which lubes crank bearings AND the underside of the pistons and cylinder walls) and into the intake to lube and cool the topside as well. New ball game today, meeting the 06 regs. So less oil and leaner Im pretty sure.
BRP's expensive and less than pleasant smelling oil is a bandaid I think.

4 strokes have the extra pair of strokes to cool plus you have oil splashed up or otherwise directed up the bottom of the cylinder walls and cooling the pistons. Which is the main reason they can last so long. No compromise for emissions involved. They are cleaner because of the much more controlled combustion process.

 

[Sled Dog]

I have to agree with Rotax & Mighty, this is what i figure Yammie will do. Not sure about the weight, but i think you will see something in the ditchbanger class that will go head to head which should be a great match. I would be suprised if they didn't put EFI on the 120's aswell. I think that would really wake them up, not that they are bad but look at the RX-1 compared to the Apex's and the difference is very noticeable. Just my .02 cents.

That is due more to the crank weight being reduced as opposed to the EFI carb diff!

 

[SledFreak]

I'm not sure if a 2 stroke can ever have the reliability of a 4 stroke

I think there are some people who own Yammies with 600/700 triples who would disagree with you on that one. Its not unheard-of for a triple-cylinder Yamaha to have 15,000-20,000 miles on it with very little problems (certainly none related to the engine).
Cap'n

Yes, I will give Yamaha that, their two stroke tripples were reliable, but the 4 stroke is still a much better motor. But not everyone likes a tripple, I like a twin with lots of torque, stump pulling power. I have not seen a tripple produce that. A tripple produces a more linier power, a gradule pull. Not for me..... If I had to choose a 2 stroke, I would take a twin.

 

[Bakemono]

Yes we have had many trouble free miles on Yami and other brand 2 stroke sleds. A two stroke depends on intake charge (air,gas and oil) coming thru the crankcase (which lubes crank bearings AND the underside of the pistons and cylinder walls) and into the intake to lube and cool the topside as well. New ball game today, meeting the 06 regs. So less oil and leaner Im pretty sure.
BRP's expensive and less than pleasant smelling oil is a bandaid I think.

4 strokes have the extra pair of strokes to cool plus you have oil splashed up or otherwise directed up the bottom of the cylinder walls and cooling the pistons. Which is the main reason they can last so long. No compromise for emissions involved. They are cleaner because of the much more controlled combustion process.

Perhaps something like Stihl's "4 mix" engine is a possible solution. Basically it has a 4-stroke cylinder head with a 2-stroke lower end. It runs on premix just like any other 2-stroke but it has the valves that keep the fuel from blowing out before its been burnt.
I agree with you though, Tork. The only way to furthur clean-up 2-strokes is to lean them out and if you do that you will furthur reduce their durability.
Cap'n

 

[yamahey]

[quote="RotaxYes, I will give Yamaha that, their two stroke tripples were reliable, but the 4 stroke is still a much better motor. But not everyone likes a tripple, I like a twin with lots of torque, stump pulling power. I have not seen a tripple produce that. A tripple produces a more linier power, a gradule pull. Not for me..... If I had to choose a 2 stroke, I would take a twin.[/quote]

Rotax, I am totally opposite. I would take the smoth triple power any day. I hate the vibration of the small twins, let alone the big ones. I wouldn't own one. But, the good thing about the Genesis engine is we get both in one. That's what the naysayers who never ride them but feel qualified to trash them just don't get. It's the engine...nothing like it out there.

 

[nbsledder]

Yamahey,that's exactly how i feel about it !

 

[BlueByYou2000]

[quote="RotaxYes, I will give Yamaha that, their two stroke tripples were reliable, but the 4 stroke is still a much better motor. But not everyone likes a tripple, I like a twin with lots of torque, stump pulling power. I have not seen a tripple produce that. A tripple produces a more linier power, a gradule pull. Not for me..... If I had to choose a 2 stroke, I would take a twin.

Rotax, I am totally opposite. I would take the smoth triple power any day. I hate the vibration of the small twins, let alone the big ones. I wouldn't own one. But, the good thing about the Genesis engine is we get both in one. That's what the naysayers who never ride them but feel qualified to trash them just don't get. It's the engine...nothing like it out there.[/quote]

Completely agree with you. The primary reason I am on Yamaha in the first place is they kept building triples while everyone else rammed big bore twins down our throats. I owned some Ski Doo twins and while they were nice, they were far short of what Yamaha was offering me in the SRX 700 mill. Then, Yamaha does a 180 and starts the 4 stroke thing. So my choices were big twins from the competetion or an even smoother motor from Yamaha than what I had in the SRX. For me, the motor in a sled probably makes up 90% of the reason I choose a sled. The others are very minor to me. Thats why this new 150FI 4 stroke has me so excited, Especially after riding them. I had a CPR turbo on my RX1 and had no intentions whatsoever of selling it, until I made the mistake of riding the 06s. It was a no brainer. The new mill is just incredible, you guys who havent ridden one yet, will simply not believe the motor. Unreal...BBY

 

[Mighty]

I'm with Matt on this one. Back in 02 I was on my way home from a sledding trip in the UP with the ol' trusty (Not) MachZ and saw the Yamaha Semi parked at Tip up Town at Houghton lake. I remembered reading about this new 4-stroke yamaha and figured I'd stop and take a look. Whe I was approaching the sled a fella fired it up. I stopped, looked at my buddies and declared; "there's my next sled". I had been a Doo guy all my life but did not want to go the twin route. The sound alone gave me, nevermind, you know what I meant. The rest they say is History

 

[Tork]

Nailed! Twins give me a bout the same thrill as starting up my lawnmower. Tripples (especially Yamaha) reached out and grabbed my [deleted] and sent a tingle up and down my spine. RX is similar. But the new 150 FI motor pulls so hard and feels so good, well just that engine, starting it, blipping the throttle feels so good.
Like Matt, no intention of buying an 06 sled, became #1 on my gotta have list after riding it. The most recent Rev I rode was a 800 HO last year. Nice sled but motor wise it feels too industrial where the 150 FI is Ferrari like.

I do agree that on a 2 stroke if you want low end torque a 2 cylinder gives that. I just wish they had some personality.

 

[LazyBastard]

Twins are nice if you don't go too big with them. Small twins 600cc and less are very nice. I'm not referring to any vmax600 twin though (or other brands), they felt like a concrete block with a jackhammer.... Exciter though, when running perfectly and clutched just right had an unbelievably creamy smoothness that was right up there with RX1.

 

[rightarm]

nbsledder I was going to purchase the new 06's but after talking to a few guy's from the Yamaha factory,they said if your're in no hurry wait till 07.Something in the context of( 490 POUNDS AND 190 HP) .

 

[LazyBastard]

I dont know about THAT. Seems to be reaching.

 

[rightarm]

Disagree all you like but there's going to be alot of 06 Apex's for sale next year,as well as another SNOWMOBILE OF THE YEAR TITLE!

 

[nbsledder]

490 pounds and 190 hp!! who do I make the check out too?