2 stroke cylinder boring and honing

[@shawnkennedy-e6f]

Andrew you are doing a fine job it's refreshing to see young men that aren't afraid to get their hands dirty.

[@ronthepainter3313]

Very cool, informational video. One thing I really like is the simple introduction, no unrealted video or unnecessary music. Just straight to the point of the subject.

[@powellmachineinc]

Ty!

[@CzechSixTv]

I love it when I see a shop still using an old-school boring bar and table. I bored a 327 for my first car(69 Nova) with one in my HS autoshop . It's also how all the cool old race shops in Patterson NJ's "gasoline alley" bored engines. The new CNC Rottlers are cool, but the simplicity of Kwik Way or Van Norman is something different. It just feels more like your truly building something rather than simply doing a job.

[@powellmachineinc]

I agree 💯

[@truthboomertruthbomber5125]

Who does the port chamfering?

[@danblack8774]

I like that you take on pretty much any type of machine work. Lots of machine shops will say no we don’t do those or don’t do that. Local one here in middle TN told me no we won’t touch any 5.7 hemi stuff 😳

[@powellmachineinc]

It gets me in trouble a lot

[@chadadececco]

Cool! That's what I love about your channel is the "other" stuff that you guys do as well! The industrial fan you balanced a while back was slick too! I have sbc and ls engines stacked up in my garage but I find all machining and engines awesome 👌 it's all knowledge 😎

[@powellmachineinc]

Absolutely, ty!

[@yarrdayarrdayarrda]

We use the rod honing machine with a mandrel using keyway stones. (4 stones and 4 aluminum guide rails) The spread of the stones and overall surface area (for us) makes it easier to keep the bottom of the cylinder round as the interrupted cylinder typically wants to hone the bottom of the sleeve slightly small since it's unsupported, and the cylinder walls perpendicular seem to want to hone larger. Have to use the rod mandrels for the small stuff (

[@ericstalker7973]

That's really cool you guys shared this small engine work. Back about 25 years ago I had a 1986 Polaris fan cooled 488cc snowmobile engine I rebuilt. I sent the engine with the new wisco pistons to a machine shop for the bore and honing. I always wondered how they were able to do the small engine work because they specialized in automotive and race engines. To be honest with you I didn't know Wisco made pistons for automotive applications especially back then. I always thought they only did small engines. I've been a fan of Wisco products ever since. Thank you for sharing this. I don't remember the exact price but to bore,hone and chamfer the transfer ports on the twin cylinder engine I think it was around 100 bucks. But that was a long time ago

[@davidgough1161]

Andrew, nothing cornbread with what works! I love learning from you, definately my kind of machinist!

[@powellmachineinc]

Ty!!

[@briana3467]

I've been doing them for years on my Bridgeport but it almost cost me money to do them., the local shops appreciate it though so I guess one hand washes the other.

[@JOMaMa..]

Thanks for sharing your knowledge and experience

[@powellmachineinc]

@@JOMaMa.. yw

[@JimZagg]

I like the fixture you made to hold them in your CK-10. I have an AN-600 so I can also hone them on my Sunnen rod hone. Plus, by manually stroking them you can keep them real straight. Great video Dan.

[@powellmachineinc]

Thank you 😊

[@jim8027]

That's a really good setup you have there. Makes those cylinders pretty easy to knock out. Andrew is doing a real good job! I guess if I asked you to bore my KTM cylinder it would be NO! LOL

[@powellmachineinc]

Be happy to work it in

[@jkdwayne]

Good Ole SeaPoo Cylinders.

[@robertfontaine3650]

I'd love to be an apprentice in your little shop. So much to learn.

[@powellmachineinc]

Awesome, ty

[@metlmuncher]

A lot simpler than when I was a kid doing this with an old South Bend lathe and boring bar longer than a wet week. Followed up with a Ammco hone.. poor does what poor does to race dirt bikes.. Lol Nice set up man

[@powellmachineinc]

We did it just like you 30 years ago

[@brianthompson1553]

I enjoyed the video, thanks. No need to fast forward any parts. Cheers.

[@powellmachineinc]

Glad you enjoyed it

[@paulshurmon138]

Thanks for the video. Good luck in the cam challenge.

[@powellmachineinc]

Fingers crossed!

[@bpowda84]

That man said “as cornbread as it is.” 😂. It ain’t stupid if it works

[@powellmachineinc]

💯

[@minibikemadman]

2 stroke life baby! building a 380cc cpi lynx with some billet cases. .can't beat a ol 2 smoker.

[@j.finesseflights1403]

We used to wet sand my old honda 2-stroke cylinders when I was a kid back in the "90's" because someone told us the honda cylinders was nickel plated or something like that? Lol, we'd wet sand any melted piston outta the walls, toss in a Wiseco piston and new rings, gaskets and go!! Worked pretty good at the time?

[@RustyorBroken]

The pressure is on with the camera and the old man watching.

[@powellmachineinc]

Lol

[@Anthony-nw5zv]

Thanks 👍

[@freeradical6390]

Do you chamfer- radius the exaust and intake ports where they meet the cylinder when your done boring and honing?

[@powellmachineinc]

No, the customer deals with that

[@donaldhalls2189]

With the boring bar it would be the ports that cause the shuddering? great job do you sleeve any of them?thanks for sharing, all the best to you and your loved ones

[@powellmachineinc]

Yes, interrupted cuts are tough on machines

[@ACatKrom]

what do you use to chamfer the ports?

[@vg23air]

cool, every small mass job adds up $$

[@brentbienvenu2471]

got a kwikway boring bar from the 50s doone thousand maybe more that bar is designed to bore blocks also great maching bb at bbs moto shop

[@TheJohndeere466]

I bought a sunnen valve guide hone. Do you know what grit stone you would normally use to hone guides.

[@endurox1481]

Quick question about this. My son and I compete in Enduro. My son runs 2 strokes. Are the watercraft cylinders nikasil plated like a 2 stroke dirt bike cylinder would be? I only ask as I am curious if they are nikasil plated does the boring machine away the nikasil plating and do the cylinders need re-plated when complete?

[@powellmachineinc]

Not all dirt bikes are nikasil, some have iron liners

[@endurox1481]

@@powellmachineinc I don't believe I said that.

[@powellmachineinc]

@endurox1481 my point is all 2 stroke have been available both ways depending on manufacturers and model, everything I do is iron, if it's plated we put iron in it

[@endurox1481]

@@powellmachineinc you misunderstood me. I wasn’t trying to imply anything. I was curious how thick nikasil plating is vs how much material is removed from the machining process. As you say I was being curious and was wanting to learn. Apologies if you felt I was implying anything else.

[@powellmachineinc]

@endurox1481 gotcha, I have no idea, we always go iron, I've heard of people having the replaced ect, but I never even tried to hone one

[@StuartBlake-iz6rf]

Nice job. All types of work pay the bills. Making fixtures to do the process is just part of the deal. Can't wait till a small engine shop brings in weed wacker cylinders for boring. Ha Ha.

[@powellmachineinc]

Lol

[@papercloset1568]

Can you bore and hone a Briggs Stratton - Vanguard twin block 12.5 to 23 HP ?

[@powellmachineinc]

Should not be a problem

[@keith6872]

What causes the bore to wear so soon. Are two stroke motors more prone to wearing out sooner than four stroke.

[@chrisschmidt4792]

2-stroke engines are more prone to problems if they’re run lean or if their oil-injection mechanism quits working. Automatic oil injection is just a bad, bad idea. I disable it whenever I can and mix oil manually. That won’t quit working. 😉

[@brentbienvenu2471]

oh dont forget to chamfer the ports all edges etc

[@papercloset1568]

Extra piston to wall clearance with the cooling water being well below 180 f ?

[@powellmachineinc]

We just do what piston manufacturer recommends

[@JamesBower-l9d]

Years ago I had to find a shop to bore a 2 stroke engine and out of 5 shops 1 would do it. They’d say it’s too much work…

[@powellmachineinc]

Yeah, some just don't know

[@williamberndt2997]

I was hoping to see you doing the port chamfering too, also do you plateau hone and use one of those sunnen brush type for finish? Not a trick question just curious what your experience is with different bore finishes

[@powellmachineinc]

We let the customer do the chamfer work, we do 150 to size and 500 till the rpk is correct

[@williamberndt2997]

@@powellmachineinc thank you

[@chadsanders3506]

Do you send those jugs out to get replated

[@mosesadk454]

Probably steel sleeved cylinders. Nicisal cylinders are bored at the plating shop to allow for the coating.

[@chopperguy57]

Cool

[@powellmachineinc]

Ty

[@doomman700]

I wonder if those are the same as SPI pistons?

[@jkdwayne]

Those are WSM ,made by ART in Japan , Very Good Pistons.

[@doomman700]

@@jkdwayne I run Elkos

[@paulbragg7618]

I wonder quite often what a company like yours could do for my Stihl ms200t. And if I lived in Murica I would probably have asked you already😅

[@merr6267]

Not that Powell can't help with that, but check out dyno Joe for chainsaw mods. There are other chainsaw porters that could probably help you out too.

[@GhostSniper67]

What was the profilometer results on that? We all expected someone to ask....😂

[@powellmachineinc]

@@GhostSniper67 lol

[@deancrawford2577]

I hate chamfering the ports afterwards on the smaller diameter barrels after boring them,

[@dalenulik5622]

Great voice, you need to do voice overs for Sam Elliott!

[@powellmachineinc]

Lol

[@PhaseConverterampV]

Great shop, clean, lots of equipment . Buy your employees a ratchet wrench for the nut maybe, that’s what we use, saves 45 min per year.

[@powellmachineinc]

Thanks for the tip!

[@iainkinsella4708]

I think you should pimp out my Jonsered 2171CS!!!

[@powellmachineinc]

Well....

[@georgecutler920]

Oh Lord you’re not using a torque plate!!!😂😂😂😂😂😂

[@bobbyabbott3035]

You didn't use a torque plate! 😊

[@bobhudson6659]

Some are questioning re chamfering the ports. How long has this shop being doing them versus those raising the question? Give Powell Machining credit for knowing what they are doing and stop asking these ill informed questions/statements. They have better things to do than respond to them.

[@powellmachineinc]

We use to spend a bunch of time chamfering, later on the just hit them with a ball hone to break the edges of the parts then finish hone and go, I've probably done a 1000 of them

[@stusue9733]

And here was I thinking all 2 stroke bores were nikasil.

[@powellmachineinc]

Some definitely

[@timothybayliss6680]

Oddly enough, i have never had a two stroke apart that didnt have an iron sleeve. There are some Al block 4 strokes that are nikasil as well.

[@patrickwendling6759]

Thank you for your knowledge and videos USA TRUMP

[@powellmachineinc]

You're welcome 😊

[@futten3230]

dont see boring bar's used much anymore

[@powellmachineinc]

Really, I couldn't imagine not using one

[@TheJohndeere466]

@@powellmachineinc The shop local to us has a boring machine. I think its a quick way maybe. but it is similar to a boring bar but the block sits on the pan rails and the boring head moves around on air kind of like a seat and guide machine. I think this is what he means by guys not using an actual boring bar. I know many of the old boring bars would set right on the block while boring.

[@futten3230]

@@powellmachineinc oh its deffinetly a legit tool but you usually see the bigger machines

[@markbulva4188]

Are thos Lund cylinders or straight aluminum

[@yarrdayarrdayarrda]

Those cylinders are an aluminum casting with an iron sleeve.

[@kenactofkindness4017]