Yz450F Big Bore or Turbo

[dieselpower]

Decisions Decisions

2014 Yz mated to a 137 yeti and there just isn't enough juice in the trees once it gets even semi-deep out.

The decisions is between the bbk with a port/polish or a turbo.

Any thoughts one way or the other?

 

[pat84]

BOTH!!!

 

[wwillf01]

Decisions Decisions

2014 Yz mated to a 137 yeti and there just isn't enough juice in the trees once it gets even semi-deep out.

The decisions is between the bbk with a port/polish or a turbo.

Any thoughts one way or the other?

What altitude to go ride at.... Check out Kms they have some great power combos with the turbo... To me if you want a big jump in power turbo is king... I just have heard some issues with low end loss ... But I am sure that is getting better.

Sent from my fax machine

 

[dieselpower]

Mostly 4-7k. I'll look at the KMS again

 

[SEOINAGE]

CR500, problems solved.

 

[Rush44]

Something is wrong. I have a 137 TS and the 14 YZ is a ripper of a bike. There is some other problem that bike should spin that track like crazy.

 

[Wheel House Motorsports]

Something is wrong. I have a 137 TS and the 14 YZ is a ripper of a bike. There is some other problem that bike should spin that track like crazy.

Thats what im thinking. My '14 YZ with a ST at lower elevation flat kills it even in waist deep snow. I can school sleds unless its fairly open. Especially with a 137 yeti that thing should just be gliding through the snow!

What do you have done intake wise?

 

[capulin overdrive]

Ditto for thinking something is wrong with your bike. My 137 goes as good or better than a sled on all but straight up steep climbs, as long as I can keep it breathing.

 

[yukondood]

I ride a 2014 yz 450 stock with a 137 yeti and it hauls the mail in all conditions. I have had 08 wr, 12 wr and 14 yz on 120 TS and a 129 TS with Yeti track. My current stock set up works the best so far.

I would never turn down a few ponies, but certainly wouldn't say it struggles when it gets steep and deep. Mine seems to keep going.

As stated earlier- might be bike issues???

 

[Yetiman]

YZ 450

I agree with above. Something doesn't seem right.
What gearing are you running? I've been running a stock YZ 450 on both a 129 and 137 and they rip. Recently just put a GYTR head and high compression piston and WOW pulls everything one gear taller! Very difficult to bog it down on hill pulls now
Going to try porting my stock head and running high compression piston to see how that compares on the other bike!!

 

[yukondood]

keep us posted on how the GYTR stuff works. 3 locals have had issues running high comp piston, head and pipe. Can not figure out the cause. Each has shown piston issue, cylinder scoring and one crank????

 

[Sheetmetalfab]

Something is wrong. I have a 137 TS and the 14 YZ is a ripper of a bike. There is some other problem that bike should spin that track like crazy.

Thats what im thinking. My '14 YZ with a ST at lower elevation flat kills it even in waist deep snow. I can school sleds unless its fairly open. Especially with a 137 yeti that thing should just be gliding through the snow!

What do you have done intake wise?

Ditto for thinking something is wrong with your bike. My 137 goes as good or better than a sled on all but straight up steep climbs, as long as I can keep it breathing.

I ride a 2014 yz 450 stock with a 137 yeti and it hauls the mail in all conditions. I have had 08 wr, 12 wr and 14 yz on 120 TS and a 129 TS with Yeti track. My current stock set up works the best so far.

I would never turn down a few ponies, but certainly wouldn't say it struggles when it gets steep and deep. Mine seems to keep going.

As stated earlier- might be bike issues???

Its 55-60 horse!!!
Of course its a bike problem.
Can't expect it to actually stretch your arms.
Workin it
Workin it
Workin it.

 

[dieselpower]

Thats what im thinking. My '14 YZ with a ST at lower elevation flat kills it even in waist deep snow. I can school sleds unless its fairly open. Especially with a 137 yeti that thing should just be gliding through the snow!

What do you have done intake wise?

Intake is a ported air intake with frog skins.

What does Kills it mean. I can pull third (Stock gearing) most everywhere but thats still a pretty slow track speed I want to rev out in third and pull fourth whenever it opens up a little bit

 

[dieselpower]

keep us posted on how the GYTR stuff works. 3 locals have had issues running high comp piston, head and pipe. Can not figure out the cause. Each has shown piston issue, cylinder scoring and one crank????

Double on this also some dyno stats would be fantastic.

 

[scottbilt95]

Something is wrong. I have a 137 TS and the 14 YZ is a ripper of a bike. There is some other problem that bike should spin that track like crazy.

same setup and it works well. no power issues at 10K elevation. the only disappointment is when you hit 3' of blower and it feels like someone threw an anchor off the back....plenty of track speed but either not enough flotation, track (2' paddle) or overall design. could be a combo of all 3. btw i dig the $#!t out of snowbiking but i am going to need to see these bikes that are comparable to a stock 800 sled in deep snow. tight trees, sidehilling, manuverability: yes. climbing, speed, flotation: no. at least not my setup. and i don't expect it to as i didn't buy it to compete with sleds. just my observations so far.

 

[Wheel House Motorsports]

Intake is a ported air intake with frog skins.

What does Kills it mean. I can pull third (Stock gearing) most everywhere but thats still a pretty slow track speed I want to rev out in third and pull fourth whenever it opens up a little bit

I guess, aside from riding some over our larger open terrain have no desire to ride a sled mine gets around so good. Yes the sleds power is impressive and they are fun to ride, but I spend my days blazing through trees that are super tight for a sled so I can carry way more ground speed even in 2nd gear then any modern sled with a good rider can.

Im not saying its an insanely fast setup, its still only 60hp... But if your riding terrain thats open enough that sleds can blow you away I feel like your missing the point of the bike and should hop back on a sled.

Just my .02.

Good example, I had to go ride a sled in with an otter sled up a trail we have broken in to rescue my YZ which I snapped the frame in half on a rock nose dive this weekend. Brand new 2016 Axys 155, the lightest production sled on the market, most nimble, whatever, its REALLY easy to ride but getting into where I was biking with ease was a challanging ride. There was no way I could even ride half as fast on the sled as the bike. I could fit everywhere and made it in without being stuck but I was on my toes! Yes the sled has impressive pull when I would blast the throttle for 2 or 3 seconds but the bike maintains so much more speed even only reved out in 2nd.

Ive just yet to see a spot where owning a turbo bikes makes more sense then owning a stock sled.

 

[CATSLEDMAN1]

whip that thing

For sure my Yamaha doesn't have the power I would prefer. 75 wide fat horses would be better.

Better than more 4 stroke hp is two stroke power delivery. The four stroke power delivery in any amount is self defeating in any soft traction condition..........read that as snow, is way not good. Right now that just happpens to be all most of us have. 100 hp four stroke bike still sucks as far as power delivery in snow.

Why haven't 4 stroke sleds become kings of the back county,..... no amount of hp or track can fix slogging digging thumping submarine 4 stroke power delivery. We are all fighting the same issue with our thumper bikes.

We need two stroke power with good transmissions . Right now our choice is torqueless motors tooo small or motors toooo old. Sled engines don't have transmissions and cvt transmissions are worse than 4 stroke power..........Hawk proved that.

The engines are out there. The transmissions are on e bay...........so whose going to step to the plate and build a real sno bike engine.

 

[d1100t]

Snowbike transmission

For sure my Yamaha doesn't have the power I would prefer. 75 wide fat horses would be better.

Better than more 4 stroke hp is two stroke power delivery. The four stroke power delivery in any amount is self defeating in any soft traction condition..........read that as snow, is way not good. Right now that just happpens to be all most of us have. 100 hp four stroke bike still sucks as far as power delivery in snow.

Why haven't 4 stroke sleds become kings of the back county,..... no amount of hp or track can fix slogging digging thumping submarine 4 stroke power delivery. We are all fighting the same issue with our thumper bikes.

We need two stroke power with good transmissions . Right now our choice is torqueless motors tooo small or motors toooo old. Sled engines don't have transmissions and cvt transmissions are worse than 4 stroke power..........Hawk proved that.

The engines are out there. The transmissions are on e bay...........so whose going to step to the plate and build a real sno bike engine.

What transmission are you referring to???

 

[J&L Snowhawk]

Mike I hope someday I can prove you and a lot of others wrong about cvt and sled motors. If I didn't live a day away from real testing grounds I would be 5 years ahead of where I am today. Doing some revisions for the 800 LT

For sure my Yamaha doesn't have the power I would prefer. 75 wide fat horses would be better.

Better than more 4 stroke hp is two stroke power delivery. The four stroke power delivery in any amount is self defeating in any soft traction condition..........read that as snow, is way not good. Right now that just happpens to be all most of us have. 100 hp four stroke bike still sucks as far as power delivery in snow.

Why haven't 4 stroke sleds become kings of the back county,..... no amount of hp or track can fix slogging digging thumping submarine 4 stroke power delivery. We are all fighting the same issue with our thumper bikes.

We need two stroke power with good transmissions . Right now our choice is torqueless motors tooo small or motors toooo old. Sled engines don't have transmissions and cvt transmissions are worse than 4 stroke power..........Hawk proved that.

The engines are out there. The transmissions are on e bay...........so whose going to step to the plate and build a real sno bike engine.

 

[Hawkster]

I don't understand the frustration with a cvt set up other than the wrong clutching or clutches for the application ?

What I also don't understand is why do the manufactures put updated obsolete belt slapping clutches on big liter two stroke sleds but than put the latest technology on the smaller two and four stroke ones , four wheelers and side by sides that are capable and reliable of running 200 horse ?

The Hawks have to be one of the most misunderstood machine made in the industry and the general public throws them under the bus which is no big deal but to use them for personal profit is a different story ,those that do can take a leap off a bridge because it's pretty obvious to me that they couldn't ride one to save their own a$$ .


What is also funny is that I'm still riding one because no one makes a machine that has the power they produce and the way it's going it might be quite some time but if I lived state side where so many are so limited to where they ride the Hawk would probably see only a few outings a year .

Well didn't I just screw things up ?