Hitchcocks Forum

Having removed the head and had the valves out for the cleanup, I noticed this



Theres a chunk of material missing from the ally of the head right where the valve seat butts up to the cut head area.
Shouldn't be problematic as it's sealed unless exhausting and doesn't appear to go through to anywhere.
Wondered if anyone had seen anything like this before?

I assume you are talking about the hole in behind the exhaust valve. This is where the decomp discharges into the exhaust so it is ok

Hi there M1ks ----------- yes, agree with NORM, that's where the de-compressor exhausts out. By the way----don't forget to remove the decompresor valve and give it the same treatment as the other two. You'll see the whole story then.

I was indeed referring to that, I did briefly wonder but wasn't sure if it was intentional or a defect, the only other bike i've had with a decomp lever was the armstrong and that worked by a lever bearing directly on the exhaust valve, and yes, the decomp will be coming out for a lapping too.

Of course now you've said that it should have been incredibly obvious as you hear the pressure escape through the exhaust, duuuh!

Strictly speaking the one on the Armstrong was a valve lifter but I'm just feeling pedantic.
More interesting is how you managed to post an image direct to this board - I've never managed it - do tell.

-----------Yes, I was wondering that as well????

Hi Mk1. How did you attach your photo to the the message??....Never seen that done before...if we can all do that it will be extremely useful...

Since we're on the subject and the original question has been answered, that picture is hosted on photobucket. It gives you several options for linking to an image so I'll try them here.

Email and IM:
http://s48.photobucket.com/albums/f216/ ... mg0474.jpg

Direct Link:
http://i48.photobucket.com/albums/f216/ ... mg0474.jpg

HTML code:


HTML thumb:


IMG code:


IMG thumb:

Wow. It didn't like the big image within frames! But equally, success.

I'd suggest using the HTML thumb code off photobucket which should give a clickable thumbnail:

I can just imagine Mr H on the phone to Sincordia on Monday morning with his head in his hands and a tear in his eye!