DIY Soda Blasting Honda CB750 Cafe Racer Engine Barrels Ready For Big Bore Conversion | 17
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- čas přidán 28. 08. 2024
- DIY Soda Blasting Honda CB750 Cafe Racer Engine Barrels Ready For Big Bore Conversion | 17
When I stripped the engine for my Honda CB750 Cafe Racer Build I had a surprise. I found that it was a big bore, and had Yoshimura 812 pistons in it. Unfortunately the barrels had been bored too big, and the wrong pistons rings had been used.
What I used:
Bicarbonate of Soda 10kg: ebay.us/XK204r
Grit blaster gun, I bought mine from Aldi, but this is a similar one: ebay.us/cKFKqy
Paint stripper: ebay.us/2sQINT
Wire brushes for a rotary tool: ebay.us/QwCsUW
It took a long while for me to get into a position to move the project forwards. I bought some new barrels with standard pistons which I could have used. But I really did fancy using the big bore pistons. I could have had these barrels bored out, but they are from an earlier bike and were in really good condition so it seemed a shame to use them for this bike.
Eventually I found a set of later barrels, they came with a head as well, and when I had sold the head I had the barrels for free 🙂 They were off a later bike where the oil ways had been modified and Honda used more seals and knock pins.
They needed a good clean before I could do anything with them. And I found that there was a very small bit of fin damage, but as it was only the top fin it would be hidden by the head anyway. I tidied it up with a file, and I am sure it will look fine on the bike when the engine is built up.
I gave them a good degreasing and stripped the paint off them first. Then I wire brushed them to clean off any of the paint that hadn’t come off. The still needed a little more cleaning so I decided to soda blast them. This technique uses baking soda and doesn’t damage the surface of the metal, just removes corrosion and paint. It isn’t as severe as media blasting and doesn’t require a lot of equipment.
Once I had the barrels cleaned up I got them sent away to be bored, it seemed to take an age to get them back. I put the spare time into working on the electrics so it wasn’t wasted.
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#cb750 #caferacer #honda #hondacb750 #sodablasting #restoration #engine
Wood chisel? Nice 😁😁😁
Looks brutal, but works a treat, I find it more controllable than a razor blade that I see frequently used. I also have a copper scraper you might see me use in some of the other videos.
Well done. Think you found the proper solution by just getting a new head.
It took a while, and there are some other issues caused by getting different barrels, but that is for a future video ;)
Great video. I like the soda blaster!! Very cool to see your progress.
I showed my CB some love and replaced the leaking fuel bowl seals. It’s such a fun bike to ride. Good luck with your project! I always look forward to seeing your videos.
Thanks. I am just getting to some exciting work with the bike. The next few videos should see the engine built up, barring anything unexpected. I love the old SOHC's I have had a couple before.
@@SPANNERRASH I do love the older CB’s. The one I have is a 98 Nighthawk I made into a cafe racer.
@@mulliedog1 Cool, Some great bikes were made in the ninties.
Interesting vid, didnt know you could still get a paint strpper that actually works, what brand was it, and where did you get please..
I know what you mean about paint stripper, and this did surprise me. Sorry it took a while to reply, I wanted to check my memory, and you know how long that can take! It is actually Dial Paint and Varnish stripper from B&Q in the UK. I got a 2.5ltr container about 18months ago. It is quite cheap, and surprisingly good.
@@SPANNERRASH Thanks for the reply, I'm in the market for some paint stripper, and will be giving that go..
My cb750k2 has suffered some alloy oxidisation on barrels and engine casings and on the nice shiny cam cover, do you think one of the £20 soda/sand blasters off amazon on a 90psi compressor would clean them all up ? thanks,.(loving the boy george esq style backing music)
I am sure that as long as you use soda and not the aluminium oxide that the blasters frequently come with you should get a good result. You will still need to polish to get back to shiny though! Good luck.
How big of a mess is the soda blaster on the side of the house ? I was thinking of getting one without a cabinet (like you)
When you first do it, there is a some white powder on the brickwork and flowers. But most of it sweeps up and with a little wind and rain and it has all gone. It doesn't seem to cause any issues to plants either.
@@SPANNERRASH thanks man! I will give it a shot. I appreciate your content! Love from Arizona, USA.
@@SPANNERRASH It will kill grass (as me how i know) use a old 45 gall oil drum to soda blast in. czcams.com/video/RgWCwTmR-BE/video.html
It is a really useful technique to have in your tool box! Thanks for the appreciation.
Use something to contain it like a big trash can but it does kill the grass
Hi what kind of compressor are you using and what psi….thanks
My big compressor was away, so I was using a little Wolf 6l one at 8 bar. You need to pause to let the tank refill quite a bit, but if you are only doing a small job it isn't too bad. Usualy we have a 150l compressor running at 10 bar, and I don't usually turn it down for blasting. I hope that helps.