Author Topic: Impact driver for clutch cover screws?  (Read 445 times)

Offline jeremypeachey

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Impact driver for clutch cover screws?
« on: February 13, 2020, 09:28:57 AM »
Here we go, the old problem. Is it worth heating the screw head, WD40 etc, and would an impact driver have any effect?
Experiences gratefully received.
Jeremy P

Offline Oddjob

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Re: Impact driver for clutch cover screws?
« Reply #1 on: February 13, 2020, 09:44:36 AM »
Buy a JIS screwdriver and a JIS bit for a socket. The normal Phillips screwdriver etc will tend to round them off, they are Japanese screws and need the correct driver bit, which is a JIS.

https://ruggedroads.co.uk/epages/00cbb604-5d1c-407e-8207-580e14387ec5.sf/en_GB/?ObjectPath=/Shops/00cbb604-5d1c-407e-8207-580e14387ec5/Products/%2212705/6/8%22
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Offline JamesH

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Re: Impact driver for clutch cover screws?
« Reply #2 on: February 13, 2020, 10:46:17 AM »
The Vessel Megadora ‘Impacta’ screw drivers are awesome. They combine an impact a function into a conventional form screwdriver. Well worth a look....

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F184056021244

Offline gtmdriver

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Re: Impact driver for clutch cover screws?
« Reply #3 on: February 13, 2020, 11:25:19 AM »
...and go steady. It's not impossible to crack the casings if you're heavy handed.

Offline mike the bike

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Re: Impact driver for clutch cover screws?
« Reply #4 on: February 13, 2020, 01:24:37 PM »
When you refit the cover, wipe a bit of copper grease on the threads and don't over tighten them.  There's always some gorilla of a mechanic showing off his strength that over tightens screws.  It isn't necessary.
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Offline Spitfire

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Re: Impact driver for clutch cover screws?
« Reply #5 on: February 13, 2020, 03:47:38 PM »
A sharp rap with a hammer or an impact driver always works for me, I had a sturdy steel T bar made using the bit from the Honda toolkit which always worked.

Cheers

Dennis
1976 CB750F

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Offline davefirestorm

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Re: Impact driver for clutch cover screws?
« Reply #6 on: February 13, 2020, 08:49:55 PM »
So,are the screwdriver bits in the oem toolkit JIS form?
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Offline jeremypeachey

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Re: Impact driver for clutch cover screws?
« Reply #7 on: February 13, 2020, 09:02:42 PM »
Many thanks all.
Jeremy P

Offline JamesH

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Re: Impact driver for clutch cover screws?
« Reply #8 on: February 13, 2020, 09:44:42 PM »
So,are the screwdriver bits in the oem toolkit JIS form?
Yes

Offline davefirestorm

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Re: Impact driver for clutch cover screws?
« Reply #9 on: February 13, 2020, 10:06:46 PM »
So,are the screwdriver bits in the oem toolkit JIS form?
Yes
Thanks James glad I’ve kept a few screwdrivers 😁
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Offline deltarider

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Re: Impact driver for clutch cover screws?
« Reply #10 on: February 14, 2020, 06:53:32 AM »
So,are the screwdriver bits in the oem toolkit JIS form?
Yes
Correct me if I'm wrong, but isn't the smaller crosshead one ordinary and the big one JIS?

Offline jeremypeachey

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Re: Impact driver for clutch cover screws?
« Reply #11 on: February 14, 2020, 01:35:21 PM »
I've found a Neilsen impact driver for 5/16in bits, which should be handy, used very carefully.
Jeremy P

Offline deltarider

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Re: Impact driver for clutch cover screws?
« Reply #12 on: February 15, 2020, 04:02:36 PM »
So,are the screwdriver bits in the oem toolkit JIS form?
Yes
Correct me if I'm wrong, but isn't the smaller crosshead one ordinary and the big one JIS?
Anyone?

Offline davefirestorm

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Re: Impact driver for clutch cover screws?
« Reply #13 on: February 15, 2020, 05:39:31 PM »
Not sure if these are Honda toolkit bits.Have nicer looking ones in Bike toolkits.
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Offline jeremypeachey

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Re: Impact driver for clutch cover screws?
« Reply #14 on: February 18, 2020, 02:24:22 PM »
Many thanks JamesH and others. GT85 spray and away for 3 days to let it soak in, found an unused Nielsen driver on eBay, bought long JIS bits, and hey presto! Wish I’d had one years ago. Great bit of kit for all kinds of things.
Many many many thanks.
PS after possibly 48 years unopened I’ll treat it to a gasket I think!
Jeremy P

 

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