2014 YZ450f with rebuilt engine?

Yamaha YZ450F 2014

42 replies to this topic
  • TN Dirt Rider

Posted December 29, 2015 - 02:50 PM

#1

Been thinking about buying either a YZ 450 or maybe even a new FX. Found a '14 that has about 34 hours on it. When it had 17 hours on it there was an oil pump failure. The owner subsequently replaced the crank and bearings (Hot Rods), new Cylinder Works jug, and put on a GYTR ported head. He still has the original parts and says the orig cylinder is still in good shape.

Would you guys run from this?? Is the oil pump a weak link for that year??

From what I can tell the bike is in great shape and has all the right goodies on it. He may even be willing to take my 08 YZ 250 (295) smoker plus some cash.

  • Ctown208

Posted December 29, 2015 - 02:53 PM

#2

Walk away from anything with a hotrods crank. I've personally seen way to many friends lose a motor to one. Hot rods will tell you after 10hrs to check it. And replace at 20hrs. Pure garbage.

It's a cheap fix tho. Just buy a new oem crank. If you can instal it it's cheap. If not find a buddy.

A shop will want a arm and a leg to fix it

  • TN Dirt Rider

Posted December 29, 2015 - 03:02 PM

#3

He's got the OEM crank. I could have it rebuilt I'm sure. I'd hate to do all that on a bike I'm just getting, but maybe if deal is right enough.

Edited by TN Dirt Rider, December 29, 2015 - 03:02 PM.


  • nucular

Posted December 29, 2015 - 03:25 PM

#4

Walk away from anything with a hotrods crank. I've personally seen way to many friends lose a motor to one. Hot rods will tell you after 10hrs to check it. And replace at 20hrs. Pure garbage.

It's a cheap fix tho. Just buy a new oem crank. If you can instal it it's cheap. If not find a buddy.

A shop will want a arm and a leg to fix it


Are you sure about that? That is news to me.

  • Ctown208

Posted December 29, 2015 - 03:32 PM

#5

Are you sure about that? That is news to me.


Do a search on Google. Tons of threads on many different forums about hot rods crank failures.
Lots of people have learned the hard way with the product.

When they go the whole motor goes.

  • Ctown208

Posted December 29, 2015 - 03:34 PM

#6

He's got the OEM crank. I could have it rebuilt I'm sure. I'd hate to do all that on a bike I'm just getting, but maybe if deal is right enough.

I would bet the rod bearing - wrist pin bearings are damaged with a oil pump failure.

  • nucular

Posted December 29, 2015 - 03:46 PM

#7

Do a search on Google. Tons of threads on many different forums about hot rods crank failures.
Lots of people have learned the hard way with the product.

When they go the whole motor goes.


I have googled. Not that many bad stories around hot rods. Wiseco yes but hot rods are normally pretty good.

  • Ctown208

Posted December 29, 2015 - 03:47 PM

#8

Ok go ahead and use one. Makes no difference to me

  • nucular

Posted December 29, 2015 - 03:52 PM

#9

I am just saying that your info was false. No need to tear down a motor just because it has a hot rods crank in it. Maybe your friends are all just crappy mechanics.

  • stevethe

Posted December 29, 2015 - 03:59 PM

#10

I'm sure not a believer in Hot rods cranks aren't you talking Chinese.

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  • jcross312

Posted December 29, 2015 - 04:01 PM

#11

Ive always heard hot rod cranks are as good or better than oem. Ive used two in the past and never had a problem. They look very well built (for 08 crf450)

  • Monk

Posted December 29, 2015 - 04:19 PM

#12

Weisco cranks have issues....

  • Ctown208

Posted December 29, 2015 - 04:20 PM

#13

I am just saying that your info was false. No need to tear down a motor just because it has a hot rods crank in it. Maybe your friends are all just crappy mechanics.


Seriously ask any real motor builder to put a hot rods in your motor. Most will tell you to take it somewhere else.

ImageUploadedByThumper Talk1451434731.894437.jpg

We build 30k drag quads. You don't think we know how to rebuild a motor lol.

Good luck with your hot rods.
Check yfz central , yfz tech, raptor hq, modded raptor. All those sites are filled with hot rods cranks. They are junk in Hondas also.

  • TN Dirt Rider

Posted December 29, 2015 - 04:32 PM

#14

I would bet the rod bearing - wrist pin bearings are damaged with a oil pump failure.


That would all be corrected in a rebuild of the crank, correct? I've dealt with a crank replacement before so just making sue I know what is what.

  • Ctown208

Posted December 29, 2015 - 04:47 PM

#15

I am just saying that your info was false. No need to tear down a motor just because it has a hot rods crank in it. Maybe your friends are all just crappy mechanics.

ImageUploadedByThumper Talk1451436445.581427.jpg

Quick search

  • Ctown208

Posted December 29, 2015 - 04:49 PM

#16

That would all be corrected in a rebuild of the crank, correct? I've dealt with a crank replacement before so just making sue I know what is what.


A rebuilt crank would have those wear surfaces reworked or replaced

  • stevethe

Posted December 29, 2015 - 04:56 PM

#17

Seriously ask any real motor builder to put a hot rods in your motor. Most will tell you to take it somewhere else.
attachicon.gifImageUploadedByThumper Talk1451434731.894437.jpg
We build 30k drag quads. You don't think we know how to rebuild a motor lol.
Good luck with your hot rods.
Check yfz central , yfz tech, raptor hq, modded raptor. All those sites are filled with hot rods cranks. They are junk in Hondas also.

Your right no real builder that produces high HP bikes do Mickey Mouse cranks.

Stock crank with a Carillo or Falcon rod yes.

Edited by stevethe, December 29, 2015 - 05:09 PM.


  • nucular

Posted December 29, 2015 - 04:57 PM

#18

attachicon.gifImageUploadedByThumper Talk1451436445.581427.jpg

Quick search


A few image results don't really tell me anything. I'm not saying they don't go bad. Search for oem and you will find issues too. I searched and found some instances of hot rod cranks going bad - most of them in built motors. The incident rate seems pretty small overall.

  • stevethe

Posted December 29, 2015 - 05:08 PM

#19

If your the average Joe and not a racer or don't own your bikes long a Hot Rods crank might be ok as in for a while.

But really why not buy a real crank as in stock or better. I go with Ctown a real engine builder might get a good chuckle.

  • Ctown208

Posted December 29, 2015 - 05:21 PM

#20

If the deal was right I'd jump on the bike. I would budget a oem crank tho. A 16 oem with oem piston and it will be a sick bike. The balanced rotating assembly is the way to go.





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