Seals & Colsibro guides on my 2015 TP heads.
Glen
Glen
Bill,
You don't need the lockring. You can bore out the threads and make the guide to fit. As long as the interference fit on the whole guide is fine, they work fine. They were like this on the big port head also. The prewar aluminum heads had lots of problems holding their shape.
David
Is this still using Gardner carbs as mentioned somewhere earlier in this thread? Adjusting the mixture seems to have improved things so you are on the right track. I have no experience with Gardner carbs. I use Mikuni carbs on my Rapide and perform well. They are well made, available in many sizes and spares are easily available. (P.S. Bill must have sent his post above while I was writing this.).........
Counter-intuitively I richened the rear carb by screwing the needle out and things improved, after two turns the rear seemed to be pulling cleanly and was sucking the palm of my hand nicely. So pretty sure it's a fuel problem of some description.
I'm now wondering if it's wear in the throttle slides letting too much air through.
With carbs that are now at least 50 years old do I try to recondition as I like them when they are working or change to Mikunis or something else?
Cheers Bill
And they last well, I would have worn out at least two, possibly three pairs of monoblocs in the time I've had my VM28s on. Cheers, Stu.They are well made, available in many sizes and spares are easily available.