Stripped the head on the 99 tonight and it has a few problems,
one loose guide, one broken and loose guide, rocker spindles not too tight in head ( not that loose either, thinking of RGM spindle lock kit here). Also some of the spindle cover tapped holes have been opened up to 5/16 would like them welded up and put back to 1/4”, thankfully exhaust and spark plug threads are ok. Looking for UK company recommendations for fitting new guides, recut seats (think they are not too bad but would replace if advised) and doing the oval cover tapped holes.
Thanks
Pete
Loose guide can be fixed…
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I had a crank reground and…
I had a crank reground and rebore done at H T Howard & Co in Slough a couple of years ago. Plenty of "classic" bike cranks, cylinder heads etc visible in the reception area waiting collection when I went there. Seem to know what they're talking about.
https://www.hthoward.co.uk/
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Also http://www.seager…
Also http://www.seager-engineering.com/ who do a lot of Norton and Triumph heads including thread repairs on exhaust.
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Loose guide can be fixed with an oversize . The Rgm kit works ,just re tighten a couple of times and locktite cover caps . re-thread kits are availiable. for diy. You might be able to get one of the stainless suppliers to make you 8 reduced hex bolts with your existing thread size. I may have a contact who can do this.