62 Triumph Bonneville

[John H]

Dressing nuts and bolts is time consuming but important to a restoration. Next is to bead blast each one and have them cad plated again. It's one of those little things that makes the rest of a restoration stand out.

[John H]

A week with the grandsons and now back to the Bonnie.
The cylinder bore had quite a bit of taper in it so it will get a bore job and new .020 oversize pistons.

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The head gasket show a leak between cylinder bores. Double checking the head indicated it was warped.
I took about .005 off to clean it up, not enough to affect compression ratio or any other dimensions.



The back rim is straightened but will need new chrome. Best I can find is 2-3 months out. Hopefully by then
I can have everything else back together.

[Dragonknee]

Love watching the process, Thanks for sharing.

[John H]

The valve guides were out of tolerance so the head was heated to 350º and the guides were removed. Surprise! two guides were oversize, one was std and one was cast iron and didn't want to come free. Finally got it out and found the bore damaged enough that it will need a special guide made while the other 3 will be reamed oversize to .004.
While at it, I took time to make a tool that will be used to 'pull' the new guides in place. This method keeps the guide in line with the valve seat which will also reduce the amount of valve and seat material removal to get a perfect valve job.
Another part of the top end process it to anneal the head gasket by getting it a dull red hot and letting it cool. This makes it soft and usable again.

[Dragonknee]

John you do some beautiful work man... I wish that I had the knowledge and the space to do a bike like you do....I have a the Moto Guzzi Convert and a couple of XS650's that need the touch.

[John H]

Thanks, I enjoy tinkering with the old machines.
Today I reamed the head in preparation for the new valve guides. Someone had previously removed and installed guides
that were not correct, damaging the valve guide bores. The correct process is to chill the guides and heat the head.
Then using the proper tool, the guides will go in just right.

[Lotus54]

I really like that valve guide installation tool you made. What a great idea.

Mark

[John H]

I learned a long time ago to strip and blast any parts that are to be powder coated. It gives me a chance to inspect all parts
for damage. Then I lay everything out and photograph it. I then give the powdercoater a copy of the photo with the order.
When the parts come back it's easy to check for missing parts and quality. Kitsap powdercoating did an excellent job.
Not much can be done until the Cad plated fasteners arrive. I'm still waiting for the the valve guides and the cylinder
boring job.

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[Dragonknee]

Just a heads up that Screaming Diesel does powder coating....

[John H]

Still waiting on the Cad plated fasteners and valve guides so not much progress right now.
So I pressed the swingarm bushing is and reamed them to 1.001"

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It was a bit of a trick driving the swingarm pin into the frame while lining up shims that limit any side play.
Got it done without scratching the frame or swingarm.

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