David & George (TriCub) are on the right track with their answers last night.
Under the proposed changes the M10, along with late C15s & Bantams & the like which are currently not eligible for pre65, will compete with modified pre-68 bikes in the proposed new Specials class, as is specifically stated in clauses i), ii) & iii) of the proposed new rules under Specials:
Special
i) Machines first available to the general public before 1 January 1968,
ii) Any such machines that have been modified to provide the ground clearance or chassis performance consistent with the Post
Classic era,
iii) D10/14 Bantam, BSA C15F/G, M10 Bultaco, and aftermarket-framed machines are eligible for this category (not Pre-1965).
ie whether the M10s etc are standard or modified they'll compete in the proposed Specials class, not pre65 or Post Classic (Twin-shock)
I can also confirm that the proposal submitted to MA asked for clause iii) under Post-Classic (regarding modified bikes) to be deleted completely, to save any confusion, because it is replaced almost verbatum by clause ii) under Specials (quoted above)
I can only surmise that the failure to remove it from the proposed new rules on their site is an oversight by MA & I have already brought this to their attention (politely). So yes, (in answer to your question) the Rules for Post Classics should be adjusted accordingly & hopefully will be in due course.
Regarding what modifications would be allowed, the wording of the proposed new clause under Specials (ie new Clause d ii) is deliberately almost identical to the one it replaced (under Post Classic).
That is, the modifications allowed or not allowed for determining pre65 eligibility are exactly the same as they were before, but under the proposed new rules substantially modified bikes - whether pre65 or pre68 - will compete in the new Specials category instead of being bumped up into Post Classics (Twin-shocks).
Such Specials will still be subject to the rules on major & minor components for the pre-68 era (tho aftermarket frames will be allowable)
George summed up modifications appropriately:
TriCub wrote:As for modification, in the past moving footpegs and fitting bash plates seems to have been ok but cutting frames to lift motors or removing lower frame tube to improve ground clearance is out. Moving rear suspension mounts would also be improving chassis performance. Rear sub frames, don't know but my opinion would be if it is lowered at the seat or narrowed it would also improve chassis performance.
There appeared to be broad consensus in the classic community that pre-65 should be for fairly standard machines & that existing pre65 competitors & their bikes should not be disadvantaged, so the proposed changes deliberately set out to maintain that & remove discrimination against country of manufacture since that was non-existent back in the day. Apart from removal of that discrimination, pre65 remains exactly as it was. Let's not lose sight of that. Alongside it, a new class is proposed for those who so desire it.
So for example, an eligible Cub, Bantam, M3/M4 Bultaco or Impala based Pre-65 Classic could have alloy/fibreglass tank, airbox, oil tank & bashplate, relocated footpegs, removed/smaller seat, suitable exhaust, longer shocks, shortened swingarm etc, but would have to have period frame, forks, hubs etc.
If people want to 'push the boundaries' &/or test allowable limits for Pre-65 by rake or subframe mods or removal of the cradle tube(s) then they run the risk of exclusion by scrutineer or protest. That risk & responsibility is entirely on their own heads, as the extra proposed new clause under Eligibilty is designed to reinforce:
The responsibility for proving eligibility is on the individual seeking approval.





