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[falcone]

Oops I am wrong.


Due to a variety of reasons have only just returned to the bike. Have roofer in today fitting dry verge So I spent some time in the garage and found that I have a different problem than I thought I had.


Took the head off last week and gave it a cursory glance and decided was a stuck exhaust valve.


Decided this afternoon to take valve off. Forgot I lent my vale spring extractor to a friend the other week. So, instead thought I'd clean the carbon from the head.


Doing so in a, how could I have missed that moment, I then discovered that what I assume is the exhaust seat has dropped and is sitting proud of the head instead.   


 Doh!

[Alan R]

Hello again bacon-slicer !!! Have just read your current post & just one, predictable question for you, ie }---- Did you phone Watsonians and ask about the exchange head ??   I bet you haven't ---- tsk, tsk. My head was supplied completely assembled and ready to fit INCLUDING a complimentary head gasket !! Could save a whole heap of money and distress. 

[Alan R]

Hello again bacon-slicer !!! Have just read your current post & just one, predictable question for you, ie }---- Did you phone Watsonians and ask about the exchange head ??   I bet you haven't ---- tsk, tsk. My head was supplied completely assembled and ready to fit INCLUDING a complimentary head gasket !! Could save a whole heap of money and distress. 

[Alan R]

-----------sorry about the double posting---jittery finger on my mouse !1 ( a mouse with fingers, eh ??)

[falcone]

No I didn't


BUT I did email and no luck mine was a later model not affected. 


Worth a try as you say though.  

[Alan R]

Hello again matey--------- If it's come out then it sounds like you have a GIANT case of valve seat recession------ or should that read valve seat advancement?? Assuming the worst, then you will need to have fitted an "oversize"new seat ( Which our hosts do )  and why not have both done while you are at it??  This may need some machining---depending on what's actually taken place. My advice is to remove both valves, springs etc and get someone with a degree of experience in these matters to give the head a thorough visual inspection. In any event all the studs will need to come out as well so the machinist can clamp down  and gain access. Look for any damage/point of impact on the crown of the piston. Remember to roll those push-rods on a flat surface and see if they are bent. ( caused by back-loading forces transmitted from the piston on contact with the valve. ). from your earlier posts it seems the engine was not turning over too fast----you may just be lucky on this one. Also remove the de-compressor valve and clean / check / grind-in. Keep us all updated and -----Keep the faith, Brother !!!!!!! "

[falcone]

Thought about time I updated this, after all the trouble people have gone to helps. Have just collected the head from a local engineering firm who have done a few minor jobs for me over the years. They have had to make and fit a new valve seat and have done a nice looking job. Will fit over next week or so, see how she goes and report back. Dave

[Alan R]

Hi matey---good to see you back again----odd that your people felt the need to make a new seat when they are readilly available from our hosts. Hope they used the correct grade of steel and profiling ??  Also, as mentioned before, please, please, please do give some thought to fitting the Hitchcock's "Oversize" exhaust valve. This is the HOTTEST part of your engine , plus the standard valve ----even a new one ---- is only just the right size. You just have to see them to fully appreciate the difference. I fitted one in my Cyl. head this winter and I genuinely think it's money well spent. Dave--- where are you ?? Would you like some assistance etc ??  Keep on Trukin !!