That must have been a LOT of honing to get that much material removed. But, I LOVE the "can do" attitude! Whatever it takes-make it happen!

That’s the best boring thing I’ve seen all day. Thanks.

There would have been taper in the cylinder when you measured the wear in the bores. With a spring-loaded hone it would be more difficult than with a rigid hone but by spending more time wherever you need to remove more material you can even it out without trimming the stones. I worked in a small decades ago and we didn't have all the fancy machines they have now and even with a rigid hone we still had to even out the bores. Nice job!

Those are made for honing, not increasing the bore. There’s nothing to keep the bore round.

I'm trying to the similar thing on a Briggs & Stratton quantum(aluminum bore) engine . Was getting frustrated that the lower part of the cylinder was smaller. I am trying to install a .020 over piston and will use your technique of making the hone smaller. Thanks for sharing this.

pro tip to anybody doing this at home, when you BORE out and engine you need a BORING head on a mill to do it properly. hence the difference in terms of BORING and HONING

I'll just pay the machine shop $50

Faster if you keep constantly drenching the stones down to remove the lifted iron particles; gasoline is the best, but mostly impossible,too dangerous(i do it in certain conditions); i use a plastic (coke) bottle with a 2mm hole on the cap,and filled with water and a lot of dish detergent, and i keep pouring it down all the time,this keeps the stones clean,and they cut better; i only ever used this to erase deep scratches,enlarging the diameter up to .005 in. max; new rings take care of it, after a while,but we know it will be a noisy motor; as reliable as new,but noisy; to go to the next size i have never done it like that, i take them to the machine shop; but if you got it nice and round, and in size, perfect,it was worth the challenge; the bore gauge and the mike for the piston are the key.

nice job, my cylinder has more scratch. They just used sandpaper for honing. The top cylinder more loose then the bottom. Work perfectly, no smoke and engine oil keep in engine.

This isn't boring , it's honing ! A ball brush hone would be a better way for any rookie to get a crosshatch pattern that would stand a fair chance of seating some new rings for awhile anyway. No replacement for doing it write though.

This video just got you a new sub ! Thanks for posting and teaching

Nice finish.

Coo, that takes me back a bit. First cylinder I ever bored was a CD175. It was around 1974 and I've done a lot of motors since then. I don't remember what pistons I used, I think maybe C90 but that may have been a later 'conversion'. BTW, your honing to size, boring is a cutting operation not a grinding operation. You found the problem with a brake hone, cylinder hones hold stones parallel. You just use a spring hone to your advantage by using the angular movement to hit the high points. If you tighten the spring all the way it puts more pressure on arms and cuts faster I know your not trained but why are you holding DTI plunger down with your thumb? It will give a false reading.

wont work, cylinder will be out of round. I tried this and the motor smoked like bogart

You have skills with measuring instruments for sure, but the main issue is a hand hone is to much human and to little machine to make a machine ? When the measurements along the bore showed a variances , you adjusted things for a round cylinder hole but how is it perpendicular ? Or how critical does that have to be ?

That is Not reboreing it is just honeing. The bore Cannot possible be concentric an you could not take enough metal off unless the bore was so worn it was near to the oversized piston. So you will at best have a oval bore now, that is a different size throughout its length. Have you ever even seen a Cylinder Boreing Machine? You can bore out a single cylinder engine barrel in a Lathe, but not a multicylinder one, thats why Cylinder Block Boreing Machines exist! You now have simply reduced a engine to scrap.

So how do you calculate the piston to wall clearance

Extremely tight budget build?. I used to rebuild a few engines a month on the side. I would take the cylinder, Piston, and rings to the machine shop a few miles away. Just needed to tell them the ring end gap. They would clean, bore, and hone for like $50 or less for a single cylinder. (Shop Price). But hey nice video and effort. Awesome if it all worked out. 👍🏻

Parabens estes comentarios ai negativos saos pesssoas que nao entende de nada porque este procedimento dar certo sim...parabens

Did you manage to set a constant piston to wall clearance with this method on both cylinders? If so within what tolerance of each other?

Omg I was having that problem when it was boring unevenly.

Can this tool be used to enlarge the piston bore to increase the piston diameter?

Really well made video!

Awesome!

Would a drill press have gotten better results? This, of course, assumes the work and check are square.

Cool music

Boring and Honing are different! This isn't boring but is still boring.

They do make a manual hone for this purpose. It is cauld a ridged hone.differant sizes.differant stone grit. What you are using is a deglazing hone. Wrong .works ok for std bore or the same oversize bore.but not for 10 thousand metal removal

I do not place negative comments, but this is like trying to use a sandpaper to re-bore an engine.

Were the cylinders still pretty round before honing? I have several older Briggs engines and they've worn the cylinders oblong. Will honing take that out or do I just need to bore it?

lol ,real back yard stuff ,do it right first time ,pay for bore an hone ,good luck

Not a good idea unless you want an out of round uneven cylinder, get it done properly.

Why don’t you show the pistons in the engine if it worked?

This is honing not boring.

The title of this video should be "how to ruin your cylinders". I watched it for the entertainment factor. I pity those who don't realize that this guy is a Bozo. The price of the bore gauge and hones were more than the cost of having it done properly.

Hi, man. Very good job! I have an Arctic cat Cougar 440 tell me if you know if you can waste cylinder liners? If it is possible to up to what size? 70 mm? For example?. Will the cylinder wall be too thin

lisle 15000 hone

You are not boring a cylinder, what you are doing is honing with a glaze buster hone. glaze buster will only follow a contour it will not work. crosshatch is also the wrong angle.

So the TL:DW version is this is not boring, and no you can't bore with a drill. I just save you 5:02.

Could you please help me finding this honing tool ? What is price /single.

Yekshmash Gret success

it's honing not boring. two different operations.

The only reason more people don't do this is a 30 overbore would take forever and a 60 forget about it.

My shop near me kp motorcycles he charged me £20 for rebore that's if you source the piston yourself. best honeing tool is the ones that look more like a bog Brush Lol or them indian made ones but they are like £70 or something like mabe more

Absolutely crazy. Must have taken weeks and that bore will never be round or accurate. For the sake of taking it to a proper machine shop and paying a guy to do it properly its not worth the risk of ruining a salvagble barrel.

what the tool name?

I have a guy that does it for 40 bucks a hole. Then it measures even up and down.

I know a guy that ran a very successful motorcycle shop over 40 yrs that used honing stones to bore 2 strokes and 4 strokes alike. He would start by getting the new piston measurement. This method can be very destructive for someone not skilled in keeping tolerances the same and not egg shaping etc a cylinder

What kind of tools ?

cylinder out of round .it must have taken a very long time

This is a bad idea. Bore with a boring bar and finish with a hone. This is only a good idea if you live in the Congo and have no machine tools

Time waistng procedure, just get it bored and finished to size, draging a hone up and down a barrel 40,000 times dosnt make sense nor will it ever give you the correct size or bore finish .

You don’t bore with a hone.

Ridges and valleys galore in that cylinder using them cheap made lawnmower style hones which arent for boring ... You may fool the lesser knowledge base but not someone who knows this art in and out... One half ass job if I ever seen it...

Could you stop with the music.

Videos like this should be deleted the bore will never be round and people watching this will get the idea that they can do it and it is far from the way it should be done

You need to do your homework before making a video.

Lose the really annoying music

Wrong 100% terrible job