Hi, Just a little clarification of the 865 work we are doing without making it too easy for anyone else thinking of offering the same.
On the 790`s to get them really cranking a bore kit works wonders, with pipes etc. of course. Although the kit itself is priced well, we find that by the time machine shop costs are included it gets into pretty major figures, and that is before any headwork, which should be done at this stage, all in all a pretty major financial cost.
Triumph have now in effect provided the expensive part of the operation on the new 865 motor, therefore what used to be a rather expensive procedure will now be considerably cheaper and easier. We plan to offer an exchange modified cylinder head and cam kit. The time and effort required swapping over a cylinder head on an air cooled twin is not substantial, but I can also appreciate that some owners may not think so.
We have completed the cylinder head development work and are currently developing a suitable camshaft combination, results to date are impressive.
We will offer cams only or even a head only minus cams if that is desired, figures for all variations of tune will be made available. The cylinder heads are modified in a manner we believe that will be unique to Thunderbike prepared twins.
Hope that clears things up and my apologies for any mis-understanding.
Cheers
Graeme
www.Thunderbike.co.nz
