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Post by ThaiGyro on Jun 29, 2019 3:45:24 GMT -5
Not sure how many of you have experienced these. Most commonly called "security torx" here. Used to be called "pin head screws".
They are not overly complicated, except the fact that they usually as a surprise. My OEM parts manual, for instance, lists them as "TORX". They are, but the surprise is that you must have a "security Torx" tool. The pin prevents insertion. 
I just swapped some parts on my FI upgrade, from a 36mm throttle to a 38mm. No big deal! Except the bolts. Keihin/Honda does some extended, over the top measures to prevent something... The security torx was part, but they were filled with a black epoxy as well. Luckily external. Since I TIG weld aluminum/aluminium...hehe, I always have some acetone handy. A few small cotton swabs to clean...and good to go? NO! Cheap ass bolts, even pin heads still can screw you! 
One came out with the proper tool...the other stripped too easily. STOP! Grind a flat!
The photos suck, but you get the idea. After grinding a flat, one hit with the Whack-a-mole impact hammer and done...
Notice the Loctite red on the outside. For this application, an idle air sensor, it wasn't right to thread lock, so this is what I call bolt head "Bead Lock". You should also note that I found some high quality Torx head screws. You could use silicon, but it is ugly.
Here is the new 38mm throttle ready for install:
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Post by 90GTVert on Jun 29, 2019 4:21:47 GMT -5
Kits like these are pretty cheap and can really come in handy. They used to sell for $9.99 at pretty much any chain auto parts store. Now they're just a couple bucks more. amzn.to/2RIo5McThere are bigger kits too, but the small ones have covered me on most things I've ran across. amzn.to/2Xb6nH8 |
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Post by geoffh on Jun 29, 2019 8:05:51 GMT -5
Yamaha use these little butes on the reed block,I replace them with 3 regular bolts and an Allen key head one.If your stuck for the correct tool I use a punch at 90d to make a small indentation then angle the punch to tap them loose,it can be done engine in frame but it,s much easier with the engine on the bench for it,s winter shakedown  Geoff |
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Post by ThaiGyro on Jun 29, 2019 9:02:45 GMT -5
Luckily, I had a shitty set of pin-torx tools...but they were like allen keys, with a 90 degree bend. That is how I screwed up the second one. (Not straight enough) I much prefer a nut diver tip, so I can better ensure a good straight bite. The threads were 4mm.
Yes, when I lived Stateside, few issues with finding fasteners/tools. Here? Not so great. Break it and make it!
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Post by aeroxbud on Jun 29, 2019 16:11:03 GMT -5
I think a lot of newer European scooters have these fitted as standard now. It's part of Euro 3 emissions. The manufacturer has a duty to make it harder to tamper with.
My Aerox had them on the exhaust, and reed valve. I replaced them nearly straight away on the advice of the mechanic who serviced my bike. He said if you leave them in, you have a hell of a job getting them out later.
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PDub
Scoot Enthusiast
Ann Arbor MEEEEEchigan
Posts: 139
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Post by PDub on Jun 30, 2019 9:15:07 GMT -5
Kits like these are pretty cheap and can really come in handy. They used to sell for $9.99 at pretty much any chain auto parts store. Now they're just a couple bucks more. amzn.to/2RIo5McThere are bigger kits too, but the small ones have covered me on most things I've ran across. amzn.to/2Xb6nH8Reviews on the first item suggest terrible quality (bits break with little force). One reviewer suggested HF has same set for ~$8 not counting 20% off coupon. |
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Post by milly on Jun 30, 2019 9:25:46 GMT -5
I think a lot of newer European scooters have these fitted as standard now. It's part of Euro 3 emissions. The manufacturer has a duty to make it harder to tamper with. My Aerox had them on the exhaust, and reed valve. I replaced them nearly straight away on the advice of the mechanic who serviced my bike. He said if you leave them in, you have a hell of a job getting them out later. So that means time to add more tools I will hardly ever use |
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Post by 90GTVert on Jun 30, 2019 10:02:43 GMT -5
Kits like these are pretty cheap and can really come in handy. They used to sell for $9.99 at pretty much any chain auto parts store. Now they're just a couple bucks more. amzn.to/2RIo5McThere are bigger kits too, but the small ones have covered me on most things I've ran across. amzn.to/2Xb6nH8Reviews on the first item suggest terrible quality (bits break with little force). One reviewer suggested HF has same set for ~$8 not counting 20% off coupon. Some of the reviews say the HF kit bits break too. I don't know, but I have a suspicion that a lot of these cheap kits are the same thing. Kinda like how 1 factory may make 1 Chinese scooter and then it gets re-branded 50 times. If you take a look at a lot of cheaper tools and then look at other brands of cheap tools, you'll see that it's hard to say for sure that they aren't the same thing between pics, specs and reviews. At that point, get 'em wherever it's cheaper or more convenient IMO. |
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Post by aeroxbud on Jun 30, 2019 14:04:37 GMT -5
I think a lot of newer European scooters have these fitted as standard now. It's part of Euro 3 emissions. The manufacturer has a duty to make it harder to tamper with. My Aerox had them on the exhaust, and reed valve. I replaced them nearly straight away on the advice of the mechanic who serviced my bike. He said if you leave them in, you have a hell of a job getting them out later. So that means time to add more tools I will hardly ever use Not at all. Just stick with your four strokes 😁 |
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Post by FrankenMech on Jun 30, 2019 18:23:02 GMT -5
I have four or more sets of the security Torx tools in many different configurations. A person can never have enough tools, until you have so many it is hard to find them when needed. Green penetrating Loctite works great but don't use it on really cheap fasteners because the fastener will break or strip out. A little heat will always help loosen Loctite. Any steel screw in aluminum parts will corrode and seize. Use Anti-Seize if you don't need Loctite. Loctite can help prevent corrosion also. Use stainless steel fasteners in aluminum if possible.
Screws with the plain hex allen wrench type heads are called Socket Head Cap Screws (SHCS). The screws with splines either external or internal are called TORX. The ones with a pin inside are called security TORX. Sometimes the pin can be broken off to allow a standard TORX wrench to be used. I have also seen a 5 spline TORX type security screw. I have not found a set of drivers for them.
Both SHCS and TORX screws are available if you look around.
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Post by ThaiGyro on Jul 9, 2019 7:09:35 GMT -5
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