That you are, but a good one.
I would have thought that the Dealers would have been behind this all the way to the bank. Its all GS`s that are being ridden and we have been known to spend a couple of pounds in their dealerships.
From personal experience BMW bike dealers are more likely to respond to requests of sponsorship made directly (& privately) to the dealer principal of each dealership rather than a public appeal such as this......
You'll need to demonstrate what sort of exposure each dealership is likely to receive both in the media as the event progresses and in any pre-event publicity.
You'll also need to give an indication as to what percentage of sponsorship/other income will eventually reach the supported charity(ies).
Although we are not BMW Motorrad dealers we are obviously closely related to this industry & would be happy to get the ball rolling with a donation, subject to the above questions being answered.