How, precisely, do you propose that the British North American revolutionaries will succeed without the help of a mutiny and revolution by the British revolutionaries in Britain? Without the Napoleonic wars the Tory state had a perfect competence to raise money and men and fight and win. It took a trans-oceanic revolution to topple Torydom in the British dominions.
For further help, look at the ideology of the "American" revolutionaries: no charter of the rights of man, no position against enclosure, pro-slavery, pro-sugar, pro-rum. Most of them were Tory Grandees in miniature and displeased by their poor standing vis-a-vis the London.
For further details, look at the role of the Boston Mob in the first revolution in North America, about the only truly democratic institution before the charter of the rights of man and the charter against enclosure.
yours,
Sam R.
OOC: Erm, what? I'm sorry, but this must be a different Revolution than OTL, if even half of this were true ITTL.....Very few, if any, of the OTL founders of America were pro-slavery, for one. And, two, the very idea of universal rights was very much an ideal of the Revolutionaries(whereas the Charter of the Rights of Man was rather strongly opposed by a good number of Loyalists, because it ensured voting rights for blacks and Natives who were willing to assimilate, for one).
IC: I'm not sure what you've been reading, but I'm afraid you've gotten a lot of things wrong in regards to the First Revolution. If anything at all, it was actually a good chunk of the Deep South planters who were pro-British, especially after Lord Dunmore personally promised them that Britain wouldn't try to pull the rug out from under them(and they never did). Why do you think the Calhouns, for example, became so influential in inland South Carolina in it's early days? A huge part of that is because many of the Loyalists(or at least those due south of New Jersey and Penn., anyway) were willing to support enclosure if it meant stopping the Revolution dead in it's tracks. Most of the Patriots, on the other hand, supported restrictions on enclosure, even to the point of eliminating it altogether.
If France and/or Spain had joined in, then maybe.
It would have been possible even without their assistance, or allowance of such, though the royalists in both countries really wanted nothing to do with the Patriots, and at least Louis would have tried to restrict them from doing it. Perhaps if we had some more men like Pulaski and Kosciusko helping them out, it would have been easier.