Factory Bike Friday: Stewart's JGR Yamaha

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2/17/2012 4:39 PM

A look at the JGR YZ450F that is on its wheels

Link here

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2/17/2012 5:22 PM

Cool. Why don't they just use Honda front wheel and axle when using Showa? Sounds easier than doing the Showa to YZF specs?

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2/17/2012 5:33 PM

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2/17/2012 5:39 PM

Maybe they should have left it alone..don't seem to want to stay rubber side down..wassat just saying

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2/17/2012 5:49 PM

The shocks are designed and built by one of JGR's NASCAR shock builders.

Wonder if that's part of the problem...
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2/17/2012 5:55 PM
Edited Date/Time: 2/17/2012 5:56 PM

Well hell...too many electronic gadgets on that bike. It's pretty obvious he keeps hitting the eject button on accident.

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Usually you pay double for that kind of action, Cotton.

2/17/2012 5:56 PM

DrSweden wrote:

Cool. Why don't they just use Honda front wheel and axle when using Showa? Sounds easier than doing the Showa to YZF specs?

You're right, they should use a Honda front wheel and axle. Along with the rest of the Honda.

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2/17/2012 6:01 PM

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2/17/2012 6:09 PM

They do absolute everything possible to get the Yam behave as the 09 model maybe? Many top pros absolute hate the new yambike. especially outdoors. One french rider even refused to ride to the finishline in a ama race from good position. Even though he had good knowledge in the team. They couldn't make the Yam suitable for him. Whatever they did. I personally spoke with high-level Yamriders and they loved to have the 09 back. (Ive heard that about Honda 08 also from a few of course =)

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2/17/2012 6:25 PM

The gas tank is sick!!!

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2/17/2012 7:24 PM

"One quarter cup factory yamaha...." Yup that sounds about right for the level of involvement yamaha is giving their top tier team and rider ..... And they wonder WHY the bike isn't working and nobody wants to ride it hmmmm me thinks me sees a pattern here. I'm of the opinion now that the bike will never get where it should've been by now simply because of the lack of effort yamaha gives to their factory team. Satellite or not that is yamaha's marquee team and they created one of the most advanced "revolutionary" bikes then abandoned it right after its release when it obviously needed a lot of help, Honda fixed their bike ..... Most all "new" models don't start off perfect out of the crate and especially this one for how radically different it is ..... One has to wonder where that bike would be today from its release if yamaha actually did some r&d aside from "reprogramming" or changing the clutch actuator arm

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2/17/2012 7:28 PM

By now I think they should just dust off reed's last works bike and have James ride it .... I seriously do not even in the least bit think that bike would be at a disadvantage in sx .... The tracks are too small for 450 sized hp. Funny how 2 stroke 500's didn't last too long in the stadium if at all when those bikes were making 60 plus hp. They figured it out then .... I truly believe that a factory or jgr (in this case) yz250 2 stroke with leaded gas would be more of a threat than he is right now ... Just an opinion not a hate fueled rant

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2/17/2012 7:30 PM
Edited Date/Time: 2/17/2012 7:42 PM

Honda found a way to get 56hp out of what was considered unanimously the weakest 2 stroke 250 engine in the class in stock form....ok now I'm gonna take a breather ...Carry on

Actually I have one more morsel I want to throw out there ..... Has anyone noticed how much smaller the sparse for the frame are on the yamaha compared to all the other aluminum framed bikes? I kind of wonder if the frame is flexing in a negative way .... Makes sense a little since bikes with less than rigid frames for sx are known for doing wildly unpredictable things that put the rider on the ground. Travis Preston said that about his factory ktm it would flex and boom! It would just go bananas...James has echoed the same problems he was having when he was at l&m not knowing what happened when he crashed or the bike would do the strangest things and boom he's on the ground again. When I watch James riding that bike its pretty clear he can't go "crazy balls" on that bike and I've never seen James ride so timid ever in his career and I don't think its a coincidence.

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2/17/2012 7:35 PM

if i was going to show the world my bike the godamm seat cover would line up with the rest of the friggin graphics

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2/17/2012 9:25 PM

Who wrote that article?? They show those trick Kite wheels and then say they have to machine a special lower so they can run Yamaha wheels??? WTH is he talking about. He also thinks an O2 sensor is some trick part. Big whoopee. My stinking SXS has one and so does every POS car built with fuel injection. Big deal. Does he think they are going to carry a Dyno in the back of the factory rig so they can get the mixture right??? That shock looks an awful lot like a Penske (not that you can really tell by this pic) but I think they are handmade. I would bet the guy that makes them has a lot of time working with Penske shocks.

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2/17/2012 10:52 PM

pete24 wrote:

if i was going to show the world my bike the godamm seat cover would line up with the rest of the friggin graphics

I agree, if it was my bike or design it would piss me off. Either fix it or change the seat cover without the white stripe, just have it with blue and black sides or something, does not flow well at all.

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2/17/2012 11:25 PM

That bike is such a POS. It ruined James Stewart's career of crashing.

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2/18/2012 12:09 AM

He is talking about JGR had to machine fork lowers for the SHOWA fork to run a YZ wheel - How many Yamaha's come stock with a Showa fork or how many Yamaha teams run a Showa fork? Most teams do not run O2 sensors on the race bike - if they can collect data they can change mapping and tuning between practice sessions. The O2 sensor could also switch the system from a Open Loop to a close loop system - yet I think this is more of a data collection tool.
Some people ask odd questions just to make a post.

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2/18/2012 2:46 AM

I wish we could see James on RV, Chad, or Metty's bike and see just how different his results would be.

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2/18/2012 2:52 AM
Edited Date/Time: 2/18/2012 2:52 AM

The solution is replacing the carbon fiber silencer cap with an aluminum one.

Q.E.D.

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2/18/2012 5:08 AM

Lightning78 wrote:

By now I think they should just dust off reed's last works bike and have James ride it .... I seriously do not even in the ...more

I agree.

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Part of Speech: Noun

Definition: A loser, poser, lame-ass. One who talks the talk, but could never walk the walk.

One who talks shit and doesn't back it up, but rather ends up eating their shit in return. A fuckin 'tard.


Usage: Slang

2/18/2012 5:14 AM

RMT wrote:

Who wrote that article?? They show those trick Kite wheels and then say they have to machine a special lower so they can run ...more

I would like to see you take just one of those custom parts and make it work on a stock bike. Either you have no appreciation for technology and trying to push the envelope or you just felt like being an asshole.

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2/18/2012 5:20 AM

DrSweden wrote:

Cool. Why don't they just use Honda front wheel and axle when using Showa? Sounds easier than doing the Showa to YZF specs?

Xeno wrote:

You're right, they should use a Honda front wheel and axle. Along with the rest of the Honda.

What Xeno said!

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2/18/2012 5:23 AM

If you need a light to tell you your bike is warm enough to ride ..............hmmmnn O.K

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I've been here 17 years , am I still English, man ???

2/18/2012 5:29 AM
Edited Date/Time: 2/18/2012 5:31 AM

RMT wrote:

Who wrote that article?? They show those trick Kite wheels and then say they have to machine a special lower so they can run ...more

The shocks that JGR use are built by JRI.

JRI is owned by Jeff Ryan. He worked for Fox, but also Penske for years. If you look at his bio page, most of those championships he mentions comes from his days at Penske Shocks.

http://www.jrishocks.com/ourteam/bio.cfm

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“If I remember how this worked, you’d put a side on, and then you’d go and have something to eat, and then you’d put another side on.” … Mick Jagger

2/18/2012 5:40 AM

All the trick parts and money thrown around won't win races if the rider can't keep it off the ground....just sayin'.

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2/18/2012 6:05 AM

James Stewart's race bike is one of most trick bikes in the pits with all sorts of electronics, data acquisition, and unique performance components. I wonder if the data acquisition software talks back to you like an iPhone 4s: “Yes James, I have found 7 places you have hit the ground this year, many very close to this location.”
w00t

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Those dudes on Vital take shit WAY too seriously. I think they think they are signed on to a "let's cure cancer" message board

2/18/2012 8:20 AM

Its not the bike - but they do need to put an air bag on it for James. And maybe a tuff block warning sensor.

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2/18/2012 8:35 AM

Drfletcher wrote:

Its not the bike - but they do need to put an air bag on it for James. And maybe a tuff block warning sensor.

Agree, James' problems aren't the bike. And in addition to air bags and tough block sensors, they could add curb checkers, bumpers, and turn signals. The bike is extremely cool and I love the innovation JGR brings to the sport. i wish people could appreciate it for what it is and not use it as another excuse for Stewarts results.

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2/18/2012 8:37 AM
Edited Date/Time: 2/18/2012 8:43 AM

bullpen58 wrote:

That bike is such a POS. It ruined James Stewart's career of crashing.

I think his career of crashing looks to be right on track.

Is it possible that it isn't the actual bike that's the problem but what's in his head? Maybe in his head he thinks the bike is the problem and no matter what they change on the bike he has it in the back of his head that the bike just wont work.

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