The Apex engine is physically smaller than the Nytro engine

[HighSpeedLowDrag]

Comparing both engines with a tape measure as well as possible with them mounted in snowmobiles the four cylinder takes less space than the triple. The total width from the back of the clutch to the outside of the magneto housing is too close to call. The triple valve cover is two inches thicker from front to back, but the biggest difference is how much taller the triple is as a result of the longer stroke, longer rods, taller cylinders and high mounted crank. That thing is huge.

 

[kinger]

hmmm so the 4 cyl would fit the new viper chassis even better

 

[snobill]

hmmm so the 4 cyl would fit the new viper chassis even better

that's next year !

 

[number1kyster]

The only way I am giving up my 4 cyl is for another 4 cyl or a 3 cyl with boost!

 

[Off Trail Mike]

I've been hearing this for a long time. AND that yami is working on a planetary reduction that integrates reverse right off the crank. If this happens soon, then start thinking the Apex motor reving to anywhere from 11 -14,000 rpm, with hp pushing beyond 170.

Pretty sure its coming. The only question is which year.

I'm betting that really high reving 4 strokes is where Yami is heading. The Nytro engine is great, but its never going past 150HP NA because its RPM limited.

Since we already have the Nypex, how long do you think it will be before we see a Vipex?

Yes I hope its soon!

OTM

 

[Mazz]

I know there is a lot of love for the four cylinder myself included but, have you guys seen the new 2014 R1? It no four cylinder, how long before we get this? The argument for three cylinders lacking power just doesn't stand up.

 

[Sasquatch]

I've been hearing this for a long time. AND that yami is working on a planetary reduction that integrates reverse right off the crank. If this happens soon, then start thinking the Apex motor reving to anywhere from 11 -14,000 rpm, with hp pushing beyond 170.

Pretty sure its coming. The only question is which year.

OTM

And think about the EXUP! The Apex as it is does not really need it! It does help the mid low punch but where the EXUP would really shine is in a 4 banger reving 13,500 with a larger gear reduction. I'm all in for a 170 NA Apex. Maybe that has been the plan from the inception of the EXUP?

For those who want turbos I can only say do you really want all that underhood heat. Turbo Cat guy with a would not ride because it is to warm out. Turbo Polaris was making so much underhood temps today that the turbo was overheating and took out the bearings (in the turbo) and started drinking the engine oil up.

I'm doing a real rethink on turbos and I think the problems outweigh the plus's. For an all temp, all winter reliable sled NA has a lot going for it! I don't think I want a turbo anymore! It seemed like a good thing but the more I think about it the less I like the idea!

 

[cannondale27]

Wow that would be something!

 

[Macheater]

The only way I am giving up my 4 cyl is for another 4 cyl or a 3 cyl with boost!

Me too! Preferably an s/c.

 

[smokingcrater]

For those who want turbos I can only say do you really want all that underhood heat.

The turbo doesn't HAVE to be under the hood... Yamaha got creative with the rear exhaust, now just throw a turbo back there also. Its been done for quite a while in the automotive world.

http://ststurbo.com/

 

[Ridndirty]

What is the weight difference between the 3 and 4 cyl engines?

 

[HighSpeedLowDrag]

According to Diamond S 8lb.

http://www.diamond-smfg.com/Nypex.html

 

[stomper]

I've been hearing this for a long time. AND that yami is working on a planetary reduction that integrates reverse right off the crank. If this happens soon, then start thinking the Apex motor reving to anywhere from 11 -14,000 rpm, with hp pushing beyond 170.

Pretty sure its coming. The only question is which year.

OTM

And think about the EXUP! The Apex as it is does not really need it! It does help the mid low punch but where the EXUP would really shine is in a 4 banger reving 13,500 with a larger gear reduction. I'm all in for a 170 NA Apex. Maybe that has been the plan from the inception of the EXUP?

For those who want turbos I can only say do you really want all that underhood heat. Turbo Cat guy with a would not ride because it is to warm out. Turbo Polaris was making so much underhood temps today that the turbo was overheating and took out the bearings (in the turbo) and started drinking the engine oil up.

I'm doing a real rethink on turbos and I think the problems outweigh the plus's. For an all temp, all winter reliable sled NA has a lot going for it! I don't think I want a turbo anymore! It seemed like a good thing but the more I think about it the less I like the idea!

Thats what happened to my buddys turbo polaris with 2800 miles on it.

 

[Sasquatch]

For those who want turbos I can only say do you really want all that underhood heat.

The turbo doesn't HAVE to be under the hood... Yamaha got creative with the rear exhaust, now just throw a turbo back there also. Its been done for quite a while in the automotive world.

http://ststurbo.com/

Yep rear mount turbo has been done for the Apex, I've seen one but not sure who built them! Problem is turbo lag, Plus is better intercooling because you cool the pressure pipe all the way back under the tunnel.

As far as supercharger goes any that have tried it all say the fuel mileage drops significantly as it always takes power hence fuel to turn it.

Lastly it costs more money to add either of those power adders!

Bigger gear reducer adds no extra cost and EXUP is already in place. NA 170hp does not increase the cost to produce the the sled. Turbo or supercharger does.

Also the 4 is only 8 pds heavier then the three a bigger gear reducer might add a couple of pounds How much do you think a turbo or supercharger adds in weight? Never mind complexity and heat.

 

[Mighty]

I bet 2014 is the last year for the 4 cylinder.....