2011 YZ 450 F Service

5 replies to this topic
  • NW450

Posted October 23, 2012 - 09:31 AM


I have an 11 450f, it has about 67 hours on it. Most of that being on the snow with a timbersled ountain horse kit, and the rest on mostly tight single track woods riding.

I am wanting to go through the bike and make sure everything is in good shape for the up coming season. It gets rugular oil changes, and a clean airfilter.

I need some suggestions on what maintinence you would do to the bike for piece of mind.


  • poppa

Posted October 23, 2012 - 12:57 PM


Basically what the book says, check valve clearance, clean and re-grease all the linkage bearings, steering head bearings, lube the cables. prolly a top end.

  • dirtriderbc

Posted October 24, 2012 - 05:04 PM


I've got a '10 I purchased used with about 100 hrs on it. If I can put a plug in for a maintenance item, do oil changes OFTEN. When checking your valves, also check your cam chain and the wear on the cam teeth. IMO, the tensioners and/or the cam chains are poorly designed by Yamaha (I've heard a report from a friend of mine who's connected to the powers at Yamaha Canada corporate saying pro level riders are only getting 25-30 hrs on a chain...) - I'm now on my THIRD cam chain - my last 2 chains stretched over 3/8" - that shouldn't happen. I don't think the previous owner changed oil enough, or the great breather tube problem we YZ owners love to hate is allowing dirt/sand into the engine after a big crash (i.e. the dunes..). I think the teeth on the crankshaft sprocket that drives the cam chain get worn easily as well. Anyhow, keep that engine as clean as you can..

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  • grayracer513

Posted October 24, 2012 - 06:15 PM


You might want to review the oil you're using, or the oil change interval. I replace my cam chains every year as a matter of maintenance. They generally have over 50 hours of off-road riding and desert racing on them by that time, and not one has ever been stretched more than a very small amount, certainly nothing close to 3/8".


Posted October 28, 2012 - 05:07 AM


When doing a top end, change the cam chain. I'd rather be safe than sorry.

  • crf450319

Posted October 28, 2012 - 06:28 AM


I ride MX only, in B/Vet and I'll put a new top end in at 65-70 hours. I replace my cam chains every 50 hours, it's cheap insurance. I also service my suspension every 20 hours, fork/shock fluids get replaced. I find it kinda funny that a lot of guys spend big $$ to have their suspension revalved by Factory Connection, PC or who-ever and then they never service it. Worn shock fluid will make your rear end feel like a bag of hammers... re-valved or not.

I used to service it (susp) every 30 hours, and I would notice a dramatic difference in feel. That got me wondering, how many hours had I been riding with it like that ? So, I dropped my interval to 20 hours. I still notice a difference, just not as big..

Mind you, I'm not familiar with how much woods riding beats up on susp. fluids, I wouldn't think it's quite as hard on it as MX but I could be wrong.

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