Topic: I knew it was only a matter of time . . .

[kyle750]

I have a set of Vessel JIS Impacta screwdrivers and they work great

This does look like it would get the job done

[kyle750]

This is still looking good 

[kyle750]

I like a manufacturer who has confidence in their product . . .  but have they seen my stripped and rusted bolts 

 . . .  and whoever came up with the name MEGADORA IMPACTA should receive some sort of marketing award . . .

[Sw1ssdude]

I have that vessel impacta too, but im not using it as an impact, i think the internal spring is too strong. i always fear shattering the thin castings when giving it a proper whack with a hammer to get one of these stuck JIS screw out (countersunk ones are the worst).

I use a proper Impact with JIS bits, with a weaker internal spring, i think they deliver more torque, and less downforce.

Short note on JIS: main difference between Philips and JIS (apart from minor geometrical difference) is that philips were designed not to strip threads. they came to use in WWI, for assembling aircraft engines. the steel screws and bolts went into aluminium castings, the philips screwdrivers are intended to cam out with a certain torque, to prevent the soft internal threads from stripping out.. JIS were always used with torque wrenches, they are not intended too slip. Japanese goods are held together with torqued screws, and they all are torqued higher than the cam out torque of philips screwdrivers. so philips screwdrivers used in JIS heads do what they are supposed to do: cam out, and chew up your nice JIS head.

(Helicoils originate from the same time period, when aircraft mechanics wound some thin wire around bolts and jammed them back into stripped out holes... if its stupid, but it works, then it isnt stupid..)

[kyle750]

I have that vessel impacta too, but im not using it as an impact

What is the point of owning a "tang-through screwdriver with built-in impact driven screw removal function" if you are not using it for that specific function?

[newday777]

Just a mention: the original finish on the transmission, alternator and clutch-side covers was smoothed (almost polished) and then clear lacquer sprayed on them. They weren't painted like the engine cases, cylinders and head were.

I still can't tell what is painted and what is clear coated. Stripping the coating now and it's coming off easily.

So you know what the difference is.
Someone painted your covers and screw heads while on the bike(1st picture of this thread). You will see the difference when you get your new screw set to know the difference of painted screw heads too.

The last 2 pictures are of my K5 hand polished covers and also an alternator cover I polished off another bike.
To polish your covers you will need to strip the paint (and the clear coat under the paint) with a chemical paint stripper (store bought stripper today isn't very good now here in the states), I have lately gone to using used brake fluid as a stripper very successfully.
Then sand out scratches in steps, from 300 grit, 400, 500, 600, 800, 1000, 1200, 1500, up to 2000 grit, then polish on the buffer with red rouge, then hand polish with an aluminum liquid polish to protect the finish.

A

[kyle750]

^ ^ ^ Beautiful Engine and Covers ^ ^ ^ Excellent photos and I can definitely see the different finishes.  Chrome on the starter motor cover, painted engine, and polished covers.  Just like on the finishing on a high end watch case  there are often different finishes to the front and sides. Different finishes make each component look unique and the overall appearance is purposeful but also refined and sophisticated.  The Honda CB750 engine is a marvel and IMO is the highlight of the bike.   

[M 750K6]

@Newday, very nice. Your crankcase alloy is better than my K6. I stripped it for paint and it had quite a bit of texture and colour difference in the alloy casting. Don't think I could have polished it up like yours. Had to be paint.

[Sw1ssdude]

I have that vessel impacta too, but im not using it as an impact

What is the point of owning a "tang-through screwdriver with built-in impact driven screw removal function" if you are not using it for that specific function?

I like the grip of the impacta. i thought it to be a handy tool for stuck screws, but i found out i like the classic impact driver better. i just use the impacta as a regular screwdriver. But the impactas also go into tool rolls for bike trips (the impact driver is too unwieldy for that) so they do see some impact action occasionally...

[kyle750]

Paint stripped then 120 grit (metal was in rough shape and discolored so very aggressive 1st round of sanding).  Then 220 and then 400.  Finished for now and leaving it rough.   Not planning on any painting or polishing until I can get a better look at the condition of all the different components.

[newday777]

@Newday, very nice. Your crankcase alloy is better than my K6. I stripped it for paint and it had quite a bit of texture and colour difference in the alloy casting. Don't think I could have polished it up like yours. Had to be paint.

The cases on my K5 are still original factory painted, just never had spilt gas left on it to eat/tarnish the paint like many of our bikes are found from lack of care of them over the years.
This bike has been kept stored over the years, during winter layups and some long term storage years, with empty gas tank and empty carbs(protected with 2 stoke oil coating or Marvel Mystery Oil, after rinsing out with diesel fuel).
The old Honda owner manuals used to recommend for long term storage to empty the tank and fog the inside with fogging oil to preserve it.  Doing so, prevents rust out of the seams, which is where old gas containing absorbed ambient moisture settles and rusts the seams leaking onto the engine. I've looked at and also bought a few that had rusted tanks that leaked and stained the painted surfaces.

To get rid of the uneven painted surfaces of the cases as you say you ended up with, you first have to sand all the surfaces smooth before new paint application process begins. It takes a lot of hours and patience to prep properly for a good result.


Here is a K4 motor I painted for a friend during the LockDown of 2020, he and his kids came and did the initial sanding and I had to go back over it all to get it good. Lots of scotch Brite flap wheels(where they could reach) and hand sanding.
The bike was originally his father in law's which had sat in a shed in southern California for 33 years with rats running all over it, peeing and chewing wires and the seat fabric. He just wanted to clean it up and get it running.
The covers were polished later.....

[newday777]

Here are a couple of NOS covers I bought from parts stashes to show you the original clear coat look from the factory.
I stuck in a couple of new screws to show you the finish.

[kyle750]

NOS covers look amazing but not as amazing as that desert cactus sunset scene painted on the tank and side covers

[Medyo Bastos]

Nice, you should be out celebrating Songkran!


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[kyle750]

Nice, you should be out celebrating Songkran!

Happy Thai New Year.  Water battles are raging in the streets everywhere.  I just got back from my evening walk and near the end I was attacked by a roving band of young revelers on scooters armed with super powerful water guns and I was completely destroyed.  So much fun!

[Medyo Bastos]

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[MauiK3]

I missed the spell check hijack on my post!
Hondaman of course.

[kyle750]

No wind and lower humidity - good day to spray the chain guard

Although it might look like an overgrown jungle this is actually a high tech paint booth and drying stand

[M 750K6]

I sprayed brackets etc. hanging from a washing line. My wife asked me to remove the washing next time.

[newday777]

I sprayed brackets etc. hanging from a washing line. My wife asked me to remove the washing next time.

😁

[kyle750]

While waiting for the impact driver to arrive from Japan I went back to my local second hand tool/junk shop looking in some of the smaller toolboxes.  I have been using a VESSEL JIS screwdriver on the right and it has been working OK but just not cracking them all.  Today I found this used T-Handle with JIS bits and bought it to give it a go on the stubborn bolts.  There were 3 bolts on the Stator Cover that would not turn so decided to try the old T-Handle with well worn JIS bit and it cracked all 3 stuck bolts in seconds and on the very first turn. Tremendous force with this tool.    What I also noticed is the JIS  bit that came with the T-Handle  perfectly fits in the bolt head - bit goes in deep and super tight. Better fit than the VESSEL.

Love to hear the sound of that crack!

[newday777]

While waiting for the impact driver to arrive from Japan I went back to my local second hand tool/junk shop looking in some of the smaller toolboxes.  I have been using a VESSEL JIS screwdriver on the right and it has been working OK but just not cracking them all.  Today I found this used T-Handle with JIS bits and bought it to give it a go on the stubborn bolts.  There were 3 bolts on the Stator Cover that would not turn so decided to try the old T-Handle with well worn JIS bit and it cracked all 3 stuck bolts in seconds and on the very first turn. Tremendous force with this handle.    What I also noticed is the JIS  bit that came with the T-Handle  perfectly fits in the bolt head - bit goes in deep and super tight. Better fit than the VESSEL.

Love to hear the sound of that crack!

The one on the right doesn't look like any Vessel screwdriver I've seen

[kyle750]

The one on the right doesn't look like any Vessel screwdriver I've seen

Although I could be wrong  I believe they were made for TOYOTA?

[denward17]

^Could be a vessel, just has the wrong tip?

[kyle750]

I assumed a JIS tip but maybe not.  I don't know?