Inspecting Pistons and Honing Cylinders on my ZX7R - Ep7 | ZX7R Restoration | Tom's Workshop 

Well done mate, you are making good progress 👍 A couple of top tips for you if I may! Always replace the rings if at all possible. They lose their energy (Springiness) over time. Even if they measure ok in terms of dimensions it doesn't mean they are ok. Cylinder wall finish is also really important. The Grit and material the hone is made from can really affect the surface finish, which in turn affects the longevity of the engine. After honing you need to spend a lot of time cleaning the cylinders. Just because they look clean doesn't mean they are clean enough!

Love the build so far Tom, just wanted to give a little advice. You never want to stop the hone in the cylinder when you are putting the crosshatch.

If you are reusing the original, or not new cylinder head bolts you have to use the used torque spec. Once they have been stretched you don’t want to stretch them again. The torque spec is in the manual

Very well done mate!!! I loved the addition of the 3-D graphics!!!

Hi Tom, I’m sure you know but it didn’t show in the video. You should always use the little ratchet on the end of the micrometer so that you apply the same pressure when measuring. Otherwise you are relying on your own internal calibration of using the same finger/thumb pressure each time you measure something. Great episode again, really looking forward to the next one. . . .However long it takes.

Another excellent video keep up the good work The little knurled cap on the end of the micrometer is for accurate tension on your measurement Very proud again Dad

Tom, it's ridiculous how much effort you're putting into these videos. I think i've been subscribed for close to a year now, and you're still at it. I know it's a niche subject so I just wanted to say thank you and also to encourage you (not that you need it!) to keep going. It's such a pleasure to see.

I have a bent oil ring from my ZZ7R P6.....As I slide the cylinder block down the wee ring popped out and it slid down with ease, nothing hanging up until it stopped. 1 new liner later. Very happy bike. Just reminds me, one little miss hap can cost and slow down a project. Kamakazi took 6 weeks to ship from Japan.

I have never known how honing is actually done… but now I do!!! Superb attention to detail as always. ❤

Did you give the cylinder barrells a complete clean afterwards after your honing? Washing out with warm soapy water, its extremely important to ensure there absolutely no microscopic traces of metal after the honing. Really good attention to detail, liking these videos😂.

Cheers for sharing the fascinating work on the ZX7R, Tom. It's also resulted in some excellent advice by a few viewers regarding the honing process too eg Don't stop the honing tool in the bore; & clean the cylinder after each sweep & then re-lubricate before every additional pass. Every day's a school day! I hope you & yours have a smashin' Crimbo+ - and here's to the next exciting installment 😉

Good job on the honing. Tom especially seen as how you’re new at this I’ve seen plenty if people get this utterly wrong and it’s important step nice work

Hi Tom, I'm following these videos of yours dedicated to the zx7r and I must offer you my most sincere compliments first of all for your expertise and then for the clarity in the images of the various phases and also for your truly high-level workshop equipment. I live in Sicily and I have a ZX9R (2002 model) and you don't know how much I would love to have a competent mechanic like you in my area. Anyway, continue with these spectacular videos of yours! Kind regards, Fabio ;) p.s. ah, I forgot...I subscribed to your channel, obviously! ;)

Really enjoying all of your hard work. Keep up the good work.

Hello Tom... Fantastic update. It is so nice to see the great ZX-7R going back to its glory. I own a P4! Take care and have a great Xmas

You didn’t mention in the video about positioning the gaps in the piston rings on the pistons, maybe you did it off camera? Good video though 👌🏻👌🏻

Tom's and RRC video in one day! it musty be Christmas

Excellent Tom

Another great video. Thank you.

Use the smaller knurled nut at the end of the micrometer...its calibrated as a ratchet stop for accurate readings

Excellent work as usual 👍😎🙂

nice work

Very cool mate reeling enjoying this build, thinking now that a Kawasaki might be on the agenda in the next few yers for me to build

Noice work mate

What liquid do you use for aluminium cleaning in the ultra sonic

There's a reason a ratchet adjuster exists on the end of your micrometer.

The videos are good and enjoyable, but it would be good to add some ambient noise, because it becomes overly quiet when you're not talking.