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8 CommentsPort Elizabeth , South Africa

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  • Remove Seized & Stripped Screws from Motorcycle Engine Covers

    Sorry! Blind punch = Pin punch I am old skool , have just always called it a blind punch http://www.harborfreight.com/5-piece-long-drive-pin-punch-set-93111.html

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  • Remove Seized & Stripped Screws from Motorcycle Engine Covers

    Hey, Nice clean looking old CB! Good solid little machines!There are various routes to removing seized screws , stripped heads etc.If you use a blind punch on the screwheads before you attempt to unscrew them you can dispense with most everything else.The blind punch will compress the material of the screwhead just enough so that a manual impact driver bit gets a good purchase on it.I've worked on motorcycles since my youth and never , except maybe once , had success with "Easy out" extractors. A good manual impact driver , a blind punch , and some bits will remove most except the most stubborn of screws.The only proviso is that your blind punch must be equal to the diameter of the screwhead - two good raps with a hammer and the blind punch before putting a screwdriver to the ...see more »Hey, Nice clean looking old CB! Good solid little machines!There are various routes to removing seized screws , stripped heads etc.If you use a blind punch on the screwheads before you attempt to unscrew them you can dispense with most everything else.The blind punch will compress the material of the screwhead just enough so that a manual impact driver bit gets a good purchase on it.I've worked on motorcycles since my youth and never , except maybe once , had success with "Easy out" extractors. A good manual impact driver , a blind punch , and some bits will remove most except the most stubborn of screws.The only proviso is that your blind punch must be equal to the diameter of the screwhead - two good raps with a hammer and the blind punch before putting a screwdriver to the screw and it will like as not, simply unscrew with a regular screwdriver.Just a caution on stainless cap head screws and aluminum , they don't go well together , it is advisable to use some "Copper slip" on the threads before inserting.'Copper slip" is also good in high temp applications like exhaust studs as it is pretty heat resistant.On the subject of exhaust studs - some penetrating oil applied before is always a good idea , also when trying to loosen them , do not try to simply unscrew them directly , i use what i call a " Wiggling " technique , that is , very slight rotation , wiggling in the tighten / loosening direction until at least one full turn has been completed. After that it will usually unscrew without much incident , if it stalls coming out , simply apply penetrating oil and run it back in , then progressively out again.Some 6mm taps would also be a good idea for thread chasing to clean up afterwards.

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