chrisdhall
Novice Class
Posts: 64
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posted October 13, 2009 12:12 AM
 Edited By: chrisdhall on 13 Oct 2009 10:13
Cross-head screws on Japenese motorcycles
As I posted in the "flies" thread, Japenese motorcycles require a JIS (Japanese Industry Standard) screwdriver for the cross-head screws to ensure a proper fit and no damage when removing them. A Philips screwdriver will not fit the head correctly. Further research on Google suggests that a Philips screw head and screwdriver are designed so the screwdriver will "ride out" of the screwhead to prevent over tightening. (which was a new one to me!)
The fairing on my ZX12 was covered in black screws and it was nigh on impossible to keep them looking good when using a Philips screwdriver: The black coating is damaged each time the screw is removed exposing the brass colour underneath. It was this problem that lead me to searching for a screwdriver that fitted correctly.
A JIS screw can be identified by a mark (either hole or a dimple) on the screwhead. Here is a picture of the above mentioned ZX12 fairing screw.
This marking tells you that this is not a Philips (or a Posidriv!) screw.
ZX14s thankfully aren't covered in cross-head screws. But an example of a JIS screw can be seen on the throttle grip cable housing. Look closely at the two screws and you can see a small hole on the screwhead. And of course the screws holding the flies in place. You really don't want to wreck these!!
  
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BobC
Pro
Posts: 1736
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posted October 13, 2009 12:15 AM
Edited By: BobC on 13 Oct 2009 08:16
What you were told about Philips being designed to "cam" out is correct. Pozidrive don't.
Good information about JIS, thanks.
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Candy Thunder Blue 2006 ZZR1400
Stock wheelbase
Max: 205.4 mph in 1.25 miles
2012 ZZR1400 in Golden Blazed Green
Brock CT Full System. etc
Max: 203.1 in 1 mile (so far)
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Douglas Home
Zone Head
Posts: 710
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posted October 13, 2009 02:46 AM
Ive got lots to learn from you guys ,thanks!
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Doug Mackay Australia
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KZScott
Needs a life
high on speed
Posts: 7235
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posted October 13, 2009 01:21 PM
so can you buy the JIS screwdrivers here or are they special order? i pretty much have all mine wrecked, so i may swap them all to allen heads...
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01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
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eklipse636
Needs a life
ZX-14
Posts: 6046
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posted October 13, 2009 02:42 PM
I didn't know that! Thanks for the info. If I can get some of the JIS screwdrivers, I wander if they would work better on regular phillip screws?
I really dislike a cheap screwdriver...
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Best: 60ft 1.351 1/8 5.68 mph 123.98 1/4
8.89 mph 151.32
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KZScott
Needs a life
high on speed
Posts: 7235
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posted October 13, 2009 02:59 PM
sometimes i wish they would ban phillips screws lol. they seem to round off the easiest. robertson is a lot better, allen is better still unless you are trying to use sae in metric or vice versa, but my favourite is torx
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01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
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BIG BLUE_ZX14
Expert Class
Posts: 374
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posted October 13, 2009 03:10 PM
Edited By: BIG BLUE_ZX14 on 13 Oct 2009 23:11
quote:
If I can get some of the JIS screwdrivers, I wander if they would work better on regular phillip screws? I really dislike a cheap screwdriver...
Should'nt the screwdriver in the bike's tool kit be JIS? Would make sense. It won't help with fly removal but for everything else it should work fine.
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2012 Blue on Black ZX14R with Go Faster Stuff...
2007 Blue ZX14 Gone...
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INTIMIDA2OR
Needs a life
RED rider!
Posts: 13081
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posted October 13, 2009 06:11 PM
quote:
quote:
If I can get some of the JIS screwdrivers, I wander if they would work better on regular phillip screws? I really dislike a cheap screwdriver...
Should'nt the screwdriver in the bike's tool kit be JIS? Would make sense. It won't help with fly removal but for everything else it should work fine.
I never thought of checking the phillips in the tool kit! I bet it is a JIS ! Funny I've been wanting to get one of those and I probably already had it lol!
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'06 Passion Red ZX-14
*Lee*
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chrisdhall
Novice Class
Posts: 64
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posted October 14, 2009 08:36 AM
quote:
quote:
If I can get some of the JIS screwdrivers, I wander if they would work better on regular phillip screws? I really dislike a cheap screwdriver...
Should'nt the screwdriver in the bike's tool kit be JIS? Would make sense. It won't help with fly removal but for everything else it should work fine.
It will be JIS or buy some that are easier to use: link
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Bluebyyou
Expert Class
Gettin My Curve On
Posts: 276
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posted October 14, 2009 11:22 AM
Edited By: Bluebyyou on 14 Oct 2009 19:23
http://www.centralhobbies.com/Tools/jis.html
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2007 Bad to the Bone ZX-14 flies out, full Muzzy exhaust system, PC III, BMC race
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dubious
Needs a life
Needs more time to ride!
Posts: 8442
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posted October 14, 2009 12:04 PM
Edited By: dubious on 14 Oct 2009 20:05
That is some interesting info, new to me...LOL
personally I can't stand JIS or phillips, and as such have replaced all possble with allen head, or hex head bolts, there are stainless allen bolt kits for our bikes on ebay a while ago.
I have bought a few different kits for other machines, so I have a mariad of spare metric nuts and bolts for any projects on the go.
I like the ones made for BRP ATV's the most for miscl. bolts on hand.they have 2 times as many fastners and evey size imaginable.
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natural selection.....
destiny will overcome intervention.
Some are not worthy of the effort.
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