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TOPIC: JIS Screwdriver P2 or P3?

JIS Screwdriver P2 or P3? 24 Jan 2019 20:11 #797452

  • ERIK814
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I need a JIS screw driver to get to the carb holders. Two came in my tool bag and the larger one (~1/4 in diameter) fits the screw but I'm not sure if it is a P2 or P3. Does anyone know?

I need to purchase a shorter (stubby version?) since I have less than 6 inches between the air box and the carb holder.

Also, if you know of a good screw driver that is short I'm all ears.
1982 KZ 440 LTD Belt Drive
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JIS Screwdriver P2 or P3? 24 Jan 2019 20:38 #797454

  • 650ed
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Here are a couple things I use for JIS bits on my carbs.............





Ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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JIS Screwdriver P2 or P3? 25 Jan 2019 05:09 #797463

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I believe those are #3 size.
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JIS Screwdriver P2 or P3? 25 Jan 2019 06:14 #797464

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Nessism wrote: I believe those are #3 size.


I agree. Best bet is to try the #3 and make sure it fits properly. Ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)

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JIS Screwdriver P2 or P3? 25 Jan 2019 08:21 #797472

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If they won't budge you need one of these.
Steve

Z1b1000 1975 Z1b
Opinions expressed by me do not reflect those of the the staff or members
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229
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JIS Screwdriver P2 or P3? 25 Jan 2019 09:24 #797477

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I HIGHLY recommend that before attempting to remove the carb holder screws you soak them for 3 days with Kroil. On my KZ650 I did that and the screws came out with no problem at all. Otherwise you run a very serious risk of either breaking the screws, breaking the cylinder head, or damaging the screw heads. I've seen postings where other folks have done that type of damage by trying to force those screws out. Ed

1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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JIS Screwdriver P2 or P3? 26 Jan 2019 05:05 #797537

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I replaced these with allen heads many a year ago.
1978 KZ650 b-2
700cc Wiseco kit 10 to 1.
1980 KZ750 cam, ape springs, stock clutch/ Barnett springs.
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JIS Screwdriver P2 or P3? 26 Jan 2019 05:58 #797538

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I bought a BSA engine once and the screws that held the case covers on had been replaced with Allen head screws. Every one of the female threads in the engine that those screws fastened into were stripped! Remember that aluminum engine threads will always strip out before the steel screw threads, so if you use Allen head screws be very careful not to overtighten them because apparently that is very easy to do. Ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)

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JIS Screwdriver P2 or P3? 26 Jan 2019 13:56 #797574

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Thanks for all this input.

I've been using Q-tips to apply Liquid Wrench all around the fasteners for a few days now. The top fasteners are blind but the bottom ones are exposed, so I've been hitting the back of the bottom fasteners with Liquid Wrench as well. I just bought a set of 1/4-inch JIS bits (#1 thru #3) as well as a ratchet set with a 3/8-inch drive to 1/4-inch bit adapter that should come mid- next week. The plan is too keep on applying Liquid Wrench every day until the bits /ratchet arrive, then take out the carbs and attempt to remove the fasteners. I also got some Loctite Blue 242 and plan to apply them to the bolts when I install the new holders.

Will let you know how it goes!
1982 KZ 440 LTD Belt Drive

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JIS Screwdriver P2 or P3? 15 Mar 2019 09:42 #800382

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Update?
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

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JIS Screwdriver P2 or P3? 03 Apr 2019 13:35 #801454

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I just recently purchased new JIS screwdrivers offline. Vessel is the company. Been using them for a month. Superb.
1975 KZ400
1981 KZ750
1984 GPZ750

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JIS Screwdriver P2 or P3? 06 May 2019 17:41 #803428

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i've bought the Vessel Impacta P2 and P3 from amazon. My opinion is that both are needed items for any japanese bike.

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JIS Screwdriver P2 or P3? 07 May 2019 04:57 #803436

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rickycodie wrote: i've bought the Vessel Impacta P2 and P3 from amazon. My opinion is that both are needed items for any japanese bike.


^ +1 ^


Good Ridin'
slmjim & Z1BEBE
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A Rider looks at your odometer and tags.

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JIS Screwdriver P2 or P3? 24 Jun 2019 17:50 #806369

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I did a update in another post but will link it here since there were some follow-up:
www.kzrider.com/kunena/3-carburetor/6100...pped-carb-boot-screw

I had to use a vise grip to get the last stubborn screw out. I turned it very slow to not break the head off the shaft. I replaced all four screws with new JIS bolts from Z1 enterprises and used Loctite to seal. Everything has been running good so far.
1982 KZ 440 LTD Belt Drive
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