Down under, an idiot and a 400F

That's the problem, there isn't much taper left after the boring as it leaves such a thin wall left in the sleeve. You can't really put the taper back in without going through the sleeve. The loss in taper at the base is what makes it so hard and easier to chip rings.
 
Taper is back on the bores thankfully. The machinest did an awesome job on the bores so that should help a bunch.

I've not done 4t pistons before, so it will be interesting to see how I go with the expander ring.
 
If your're worried about rings dont be. The eBay seller you bought your piston kit from will sell you a pack of rings individually for 8 bucks or so. I lost my gasket so I ordered a new gasket and a set of rings in case I broke one.
 
ronnie said:
If your're worried about rings dont be. The eBay seller you bought your piston kit from will sell you a pack of rings individually for 8 bucks or so. I lost my gasket so I ordered a new gasket and a set of rings in case I broke one.
Click to expand...

Yeah I remember seeing parts for the pistons. Trying to avoid needing them first up ;)
 
I've got my freshly bored and honed barrels sitting in a box still. What do I need to do to them to clean them up, stop them rusting and get them ready for installation?

I was going to:

1. Wash with soapy water to clean them
2. Dry
3. Spray liberally with WD40 to stop rust

What steps do I take prior to installation considering I may not be firing the bike up immediately after rebuilding the motor.
 
Oil piston skirts but leave bores with just WD40
Oiling the bore is biggest cause of glazed rings, but, if you won't be running motor for a while, leaving cylinders dry will probably allow them to rust from atmospheric water vapor so you'll have to use something
It may be better to leave cylinders off until closer to the time you can fit and run motor or, build rolling chassis, assemble bottom end, fit to rolling chassis then assemble top end in frame
 
crazypj said:
Oil piston skirts but leave bores with just WD40
Oiling the bore is biggest cause of glazed rings, but, if you won't be running motor for a while, leaving cylinders dry will probably allow them to rust from atmospheric water vapor so you'll have to use something
It may be better to leave cylinders off until closer to the time you can fit and run motor or, build rolling chassis, assemble bottom end, fit to rolling chassis then assemble top end in frame
Click to expand...
Through experience I will disagree. I started the build of my XR1327 36 years ago. The motor was built and buttoned up and never oiled up or fired. When I finally pulled it out of the basement to finish last year my biggest concern was how badly the rings had rusted to the bore. The mechanic said it would be easy to check by putting his bore scope into a spark plug hole and view the screen. What I saw absolutely amazed me. I saw cylinder walls that looked as though they were honed yesterday. Nothing but fresh clean metal in the cylinders after 35 years
 
You either had a dead dry storage or were very lucky. (or both?)
Usually at least 1 cylinder will have valves open and even when 'sealed' there will be some air movement which could cause rust
 
My brother stored the bike for probably 6-7 years (don't know where in Ca.), I had it in a number of different houses throughout the years here in Ga. Fortunately I understood the value of that machine so I never stored it outside (for safety sake, not weather) and always kept plugs in it.
 
Think I will leave the motor apart until I can run it. I've had great results with dry building motors for effective ring bedding so would prefer not not have to oil the barrels.

Will oil them for the moment, then give them a nice soapy bath before fitting and trying to fire the fucker up!
 
I picked up the final piece of the motor today... the third head I've bought but this one I bought from Old Gold Motorcycles just up the road from me so I could check the head for any issues prior to dropping the cash. Old Gold did my barrel boring and are top chaps, the head was a steal and is clean and good with no damage:

F8EBD129-400F-47F3-85B0-0A185C38010D-2080-000001926492C28F_zps50d440bb.jpg


The head had the obligatory 8 exhaust gaskets, so these were removed:

9899E042-E53F-4679-9403-DAC46058F9A3-2080-000001926A8A7495_zpsc547aab9.jpg


The motor is whole again and will be sent out for vapour blasting next month:

A5466F7D-0BA6-4B53-93DA-6ECC24FEDDD9-2080-000001926FE94142_zps0c87bfa2.jpg
 
Nice one ;) looking forward to seeing how it comes up from blasting :o Any idea how much it'll cost?
 
andycafe said:
Nice one ;) looking forward to seeing how it comes up from blasting :o Any idea how much it'll cost?
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Yeah, the estimate is $250 - $300 which is great in my opinion. All reports seem to say it should come up looking almost new :)
 
I think it will come back looking much better than new, after seeing vapor blasting Swan had done on his BSA 8)
 
This is who I use for my Vapor Blasting. Excellent place if you are on the west coast. They are in Ore. He says he won't do "multicylinder" motors but I think he means more than twins. It's because he is tired of cleaning the dirty shit people send him. If you make sure your parts are clean and tell him I sent you he should do them for you. I think his pricing will get you for less than the $250 you quoted.

This what my 51 year old motor looked like after blasting inside and out:






http://www.vaporblasting.biz/index.html
 
o1marc said:
This is who I use for my Vapor Blasting. Excellent place if you are on the west coast. They are in Ore. He says he won't do "multicylinder" motors but I think he means more than twins. It's because he is tired of cleaning the dirty shit people send him. If you make sure your parts are clean and tell him I sent you he should do them for you. I think his pricing will get you for less than the $250 you quoted.

This what my 51 year old motor looked like after blasting inside and out:






http://www.vaporblasting.biz/index.html
Click to expand...

Yeah. Except shipping from Oz might be an issue..........
Haha
 
I forgot where he is. This forum , unlike the others I'm on, doesn't list your location on the posts so it slipped by me.
 
I think it's this guy? Only an hour drive from me if you want me to handle shipping stuff, neevo.

http://www.vaporblasting.biz/

There's also this guy:
http://www.dotheton.com/forum/index.php?topic=53266.0
 
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