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250rob

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About 250rob

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    TT Member

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    North Carolina
  1. 250rob

    Honda CRF150r top end rebuild

    Verdict was shim in crooked, caused piston to hit valve and make worse, shaving metal from the intake valve bucket, then bam, all heck. Cam carrier replaced, new bucket, polished cam, new shims and reset timing. Than,s guys, your diagnosis was spot on.
  2. 250rob

    Honda CRF150r top end rebuild

    Agree. But still need help.
  3. 250rob

    Honda CRF150r top end rebuild

    Got two strokes too … not mad. Just want to figure this puzzle out. You mad me laugh (at myself) at least.
  4. 250rob

    Honda CRF150r top end rebuild

    I am baffled … took it apart again and found the right intake shim offset in it's little pocket. Not sure how that happened? I checked the clearance with it all back together and it was in spc … did the piston hit the alve causing it to knock the shim out of the retainer? The bucket/lifter is burned/heat marked … metal shavings in cylinder head assembly. Super small flakes (salt grain) was in the oil … would this be from the bottom end then? Cylinder walls are perfect … piston rings, good, piton had carbon mark from valve that had builup on it … Kick starter kicks fine with cylinder head off … not locked up … what is going on? Opinions please. WIll post photos next.
  5. 250rob

    Honda CRF150r top end rebuild

    Yes. Wound it.
  6. 250rob

    Honda CRF150r top end rebuild

    I already adding that oil to other recycle sorry. They were super tiny, like salt if not smaller. I guess i will tear it back down. I did video of noise. Will try and post. Video here: http://vimeo.com/107255280
  7. 250rob

    Honda CRF150r top end rebuild

    Drained oil ... Small flakes of brass ... Guess I messed up bad!
  8. 250rob

    Honda CRF150r top end rebuild

    HELP!!!! 150r ran good, louder noise (?) while idle. Let it run for a good ten minutes. Then took up street. Back fired and cut off, started right back up, but cuts of and makes a metal noise. Turned off immediately. I replaced piston, rings, and valve shims ... What could be happening? Gonna check oil for metal/brass.
  9. 250rob

    Honda CRF150r top end rebuild

    Oil. Change starts first kick. Timing was spot on. Now there is a tick. Is that valves having more clearance?
  10. 250rob

    Honda CRF150r top end rebuild

    Just finished putting in new piston and ring, plus valve shims on my son's Honda CRF150r... And my question is: is there anything I need to do before starting it for the first time? I did slow kicks and everything seems to be smooth. Compression feels much, much better. Do I need to put fresh oil in? It was ridden once for about an hour or two after I changed oil and filter last. Comments please ... First top end for me so I am nervous.
  11. 250rob

    Possible countershaft leak 2010 crf250r

    Also, check your breather/drain hoses and make sure they are not clogged up. His had a kink in it … making pressure buildup which blew the seal.
  12. 250rob

    Possible countershaft leak 2010 crf250r

    Same thing happened with my kid's 70 … it was the countershaft seal … quick and easy fix.
  13. 250rob

    Torque Wrench Recommendation

    I only ask because I have Park Tool brand to work on bicycles, did not know if there was a need for industrial version, I guess I don' see going up to 200 pounds, correct?
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