2014 yz450f worn connecting rod

Since it seems that Yamaha's correction for the matter was to change the rod, it appears likely that the rod was at fault for either a loose fit to begin with, or wasn't hardened or finished correctly in the first iteration.  It's been a long time since I heard any stock YZF ping on the minimum required octane, but with everyone remapping their EFI bike's timing curves all over the place, I thought I'd ask. 

The Hot Rods crank uses the forging from the KXF250. It is slightly beefier and I have not seen a failure yet.

Well she's back together,

Running well so far on the stand,

My dealer will let me know if I'm paying for my crank or not this week hopefully,

I forgot to pickup oil so I'm running

Royal purple for the moment, what's everyone's opinion on it ?

Getting my wheel back from my buddy hopefully get out to the sand this weekend

ImageUploadedByThumper Talk1441488122.059936.jpg

 

I forgot to pickup oil so I'm running

Royal purple for the moment, what's everyone's opinion on it ?

 

 

It's not great.  Should be OK if you change it often.

What do you run ?

I plan to do a service oil after break in

I use either Mobil 1 Racing 4T or Amsoil "Synthetic Motorcycle Oil" (MCF)

Well Yamaha didn't cover any costs,

I am a little disappointed but they gave me a unmatchable deal on my parts

Riding after break in

https://vimeo.com/138616706

I have also just started to hear knocking coming from my head on tick over? Never noticed it before until a few rides ago, I've always used high octane fuel but the last few times I've used normal 95 octane and this is when I've noticed the sound.

My bike only has 23hrs from new!

I was informed to change the piston every 50hrs but since this knocking sound I'm thinking of doing it sooner before something goes bad!

Edited by Gaz929

Rod failure is a major issue is there a bulliten out for this or a recall? What years does it affect, is it only the 14 or does it affect other years too.

Apparently according to my regional manager there is no known issue.. He said it could be an American thing why they cover cost and if he even tried his boss would reject it.. Word for word what I was told,

I'm not overly happy but atleast my bikes up and running, 815$ later..

If your bike is starting to tick or knock I would address the issue or at least have a game plan. If you can convince or arrange something with your dealer you should do so. If they will not cover like in Daniels case it will still be cheaper to disassemble, inspect, and rebuild as he has done. I was also told that there is currently no recall or bulletin for this but it's starting to sound like there may be a rash of bad rods or a design flaw that affected a group of motors.

I was talking with a local mechanic and he was telling me that he has seen several Yamaha's with rod failures in his shop.  that was his unsolicited response, as I was talking about my Honda troubles and thinking about switching to a Yamaha and he recommended looking to another brand.  I am sure corporate knows about it and are trying to keep the costs down.  

If your bike is starting to tick or knock I would address the issue or at least have a game plan. If you can convince or arrange something with your dealer you should do so. If they will not cover like in Daniels case it will still be cheaper to disassemble, inspect, and rebuild as he has done. I was also told that there is currently no recall or bulletin for this but it's starting to sound like there may be a rash of bad rods or a design flaw that affected a group of motors.

This is what I'm thinking mate! Open her up and see what's what.

What exactly do I need to replace/upgrade?

Edited by Gaz929

This is what I'm thinking mate! Open her up and see what's what.

What exactly do I need to replace/upgrade?

Well I, personally, would try the dealership that you purchased the bike from first and see if they would help you out with parts. If they will, they are going to want to do the labor themselves to find the flaw so I would suggest figuring that out before tearing it down. If you don't want them to do the work or you aren't able to get their help then I would tear down and see if you can find wear similar to what the OP found.

The parts being replaced will be personal preference and there might be a difference between parts needed to be replaced and parts that SHOULD be replaced. Sorry Daniel. Not trying to hijack here.

Did yamaha update the rod for 2015?

Yes.  The rod for 2015 carries a new part number.  The '14 rod is the same in the '10 - '14 models, though, and there hasn't been a spate of rod failures going back to those models.  I doubt it's an issue of a significant defect. 

I'm not sure if the oil nozzle will do anything but I figured if they use it for high compression it must do something, it has 2 leak holes vs the standard 1

 

 

What was the part number for that GYTR oil nozzle?

Thanks!

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