Hello and a question about valves

Ericvanrijn · Post by **Ericvanrijn** » Sat Aug 22, 2015 3:00 am

Hi everyone,
I am Eric van Rijn and I am living in the Netherlands. I am riding bikes as long as I live,(nearly :)
and at this moment I am busy with the restoration of a C77 from 1962. When I bought it it looks like the picture below, at this moment it looks like the second picture, yes the bike is in the living room! I took the whole engine into parts because I would like to do a good clean job.(sorry for my badly english).

I have a question about the valves, what should I do? Just build it all together again with just cleaning or should I do some grinding, or other stuff (polishing with pasta?)tho make sure the valves are closing properly. To be honest, when I look at the valves they are looking as the should be, but I am not an expert.
I hope to get some advise from this forum, thanks in advance for all the input!

Ericvanrijn · Post by **Ericvanrijn** » Sat Aug 22, 2015 3:02 am

now it looks like this

DianneB · Post by **DianneB** » Sat Aug 22, 2015 3:24 am

I just did the engine on a 1967 C77 and wondered about the valves as well.

I have a friend who was a motorcycle racer and engine builder most of his life and he advised me against doing anything with the valves unless it was needed. Apparently the tooling to re-seat the valves is specialized for this engine and hard to find.

He suggested I test the valves while the head is off by injecting some gasoline over each valve when closed - I used paint thinner. If some seeps through, the valve is okay but if it pours through the valves need to be done.

I did this test on mine and the valves were pretty good so I left them alone. I started it for the first time last night and it ran fine.

Good luck in your project!

jensey · Post by **jensey** » Sun Aug 23, 2015 10:44 am

Hi Eric,

You're also on the motor-forum, isn't it ?
I did reply several times on your thread (supersports400)

Good you found your way to this forum.
Where are you located in the Netherlands ?

Jensen

Ericvanrijn · Post by **Ericvanrijn** » Sun Aug 23, 2015 11:35 am

Hi Jensey,
I am living in Nootdorp,about 100 km from huizen😉
Yes, last week I found this forum, and at this moment I am working on the engine.
Hopefully the engine wil run in the coming weeks.
Nice to meet you here,
We keep in touch .

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Hello and a question about valves

Hello and a question about valves