CR80 clutch bolt?
  • edubldee
    Posts: 9
    Hi guys, just signed up to the forum.
    Im having a little trouble removing the centre bolt from my clutch basket, when i took the four outer bolts holding the clutch springs of it beacame apparent that someone had tried to remove the bolt before without success. no problem i thought, ordered a new bolt and set to work. IT WILL NOT COME OFF!!
     ive tried everything, breaker bar, impact wrench all im doing is making a mess off the bolt. it is originally 14mm and was already a little rounded so i took a dremel and carefully ground the edges smaller so i could fit a 13mm socket. it was so tight i had to hammer the socket on, fired up the impact wrench and it would not move, borrowed a more heavy duty one and it rounded the head of the bolt AGAIN.
    I then drilled into the middle of the bolt to use an extraction set, wound it in extremely tight but as soon as i applied pressure it stripped and came out. so i dremeled a deep line through the centre of the bolt to fit a large flathead from my impact wrench set, an it TWISTED the flathead bit before chewing the bolt up.
    Im really stuck here guys, does anyone have any ideas? chiseling the head off the bolt is the last thing i want to do because my basket is perfect and i dont want to damage it!

    Thanks

    Eddie
  • CRWOODS
    Posts: 450
    Reverse threaded?
  • edubldee
    Posts: 9
    Nope. I have the replacement bolt which is normal thread and also tried it the other way just in case because it was being so stubborn. Im stumped on what to do next

    Thanks for the reply
    Eddie
  • markyrocks
    Posts: 1,280
    Hmmm. Sounds like u knew sum tricks... if u have welding stuff u could try welding another bolt to it to atleast get a good grip in it. Either way sound like heating the original bolt with a torch is ur next move. I guess if all else fails you maybe left with drilling it out an tapping it. But I'd only suggest this if u really know what ur doin. It maybe possible to grind head off remove basket an grab what left with a pair of vise grips. What ur best bet is prolly to bite to bullet an take it to a shop before u do more harm than good. That really sucks man. I know how frustrating this crap can b.
  • Yeah markyrocks i know a few tricks, had things like this countless times before and thought it would be a breeze! Like you say ill end up doing more harm than good if i carry on, im gonna take it to a welder an see if he can weld another bolt on without doing any damage. I thought heating the bolt might be a bad idea due to the location, although i suppose its worth a try before i take the motor out and to a machine shop. Also bought a snap on stud extractor set in case i end up taking the head off the bolt but im unsure if there will be enough left protruding to get a good bite with the extraction socket. im gonna have one more go then take it to my local engineer, i nearly torched the bike in frustration yesterday!

    Thanks for the replies

    Eddie
  • NZriderNZrider
    Posts: 5,086
    applying heat is usually way up near the top of my go to bag of bolt extraction tricks. if someones put a high strength loctite on there then heat is nearly the only way to get that sucker moving
    *********************
    Winning is 90% rider and only 5% bike, the rest is luck
  • Finally got it done, applied heat and got an extremely skilled mechanic friend to come round who cracked it with a blunt Chisel and a hammer! So much threadlock round the bolt it was unreal.

  • Maple Leaf MXMaple Leaf MX
    Posts: 12,821
    Good to hear brother
    Expect to die whenever but dream to live forever

    ..the good times on the old DR board will never be back! RIP!
  • markyrocks
    Posts: 1,280
    Happy for u. Now get that puppy up an runnin
  • Thanks guys, shes gettin there, but as one hurdle is passed another raises itself even higher......................................

Welcome, Guest!

It looks like you're new here. If you want to get involved, click one of these buttons!