what to do when you cant unscrew the screws

[ghettostan]

my bike needs a new set of chain and sprocket, but one problemo

i cant take the case/cover off to get into the front sprocket, becuase the screw have been screwed on pretty tight and i cant seems to unscrew them.

whats the best thing to do?

leave it to a mechanic?

i dont want to keep trying myself because sooner or later the screw will be warned out and will become rounded.

help ! lol

[stinkwheel]

You need a tool called an impact driver.

If you don't have one of those, a bit and brace is also quite effective (an old fashioned drill brace with a screwdriver bit in the chuck).

Giving them a good soaking in penetrating oil is never a bad plan.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[ghettostan]

thanks mate i think my mate said he has one of those, if not i will go and buy one, thanks.

[Mudskipper]

I've always found a good spray of Loctite freeze n release helps with those real stubborn bastards.

And like stinkwheel says, an impact driver.
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CBR125|||GSXR400|||CBR400|||CBR400|||CB250RS|||GSXR750|||CB250RS
"You're clumsy, you eat too much and you behave like a 12 year old boy. But you know what? Every once in a while, you find a thumb."

[skinny]

Also it will help after giving it a good spray to find the right size screw driver and give it a couple of good tap this is normally enough to free up a stubborn bolt.
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oops I did it again....

[stinkwheel]

Oh yeah, and don't put them back in again afterwards. Replace them with some socket head cap-screws (the sort that take an allen key) with a thin smear of copper grease on the threads. They'll waltz out next time you need to remove them.

Putting semi-burred crosshead machine screws back on motorbikes comes second only to joining wires with PVC tape on my list of things which make me want to repeatedly hit someone with a claw hammer.
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[Walloper]

[stinkwheel]

[veeeffarr]

[ghettostan]

[Odie]

If you find that you screw driver bit slips put a bit of valve grinding paste on the tip, it will give you a better grip on the screw head.
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You are so ugly when you were born the doctor said "I?m gonna drop it, if it falls is a rat, if it flies is a bat."

[stinkwheel]

If you find the screwdriver bit slips, put it back in the box and select the one that is the correct size and type for the screw you are tryi8ng to undo.

Importantly, learn the distinction between phillips and posidrive.
https://en.wikipedia.org/wiki/Pozidrive
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[Odie]