head bolts, replace?


6 replies to this topic
  • czechalien

Posted August 21, 2011 - 04:14 PM

#1

2009 YZ450F, When doing a top end, do you guys replace head bolts, too?
Also this is second top end and I did not replace them the first time.

THX

  • grayracer513

Posted August 21, 2011 - 04:43 PM

#2

You aske this question then, too, didn't you? I probably wouldn't, but it might be a good idea, all the same.

  • czechalien

Posted August 22, 2011 - 06:51 AM

#3

possibly, I'm getting different answers every time I ask someone.
I will get new just in case

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  • crf450319

Posted August 22, 2011 - 07:21 AM

#4

How many hours do you have on your '09, what are your intervals for replacing the top end ? What do you use your bike for, MX, enduro ?

Just wondering what other guys are doing...

  • czechalien

Posted August 23, 2011 - 07:16 PM

#5

did my first top end 55 hrs, second 80hrs, bike has total of 135hrs.
I ride MX only and i like to keep it in high RPMs rather than log it, better response I think.
When I opened it for my second top end, it actually looked really well, all it needed, was to adjust intake valves, but I thought since I have to get the cam chain off and I do have 80hrs since last top end, why not take it all apart and do second top end.

  • todds924

Posted August 31, 2011 - 07:51 PM

#6

2009 YZ450F, When doing a top end, do you guys replace head bolts, too?
Also this is second top end and I did not replace them the first time.

THX

If you SNAP one off...replace it...........J/kidding
You dont need to replace your head bolts....I would be more concerned about the cam chain.

  • czechalien

Posted September 02, 2011 - 11:36 AM

#7

Sure, it only make sense to replace the cam chain, only 20 bucks more for chain plus 10 buck for the gasket.
Bike runs great now.





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