One option could be as simple as going back to the BDL Belt drive. I did some calculations this morning and here's what I came up with (and granted these figures are not exact).
With the stock primary system the ratio between the front and rear sprockets works out to 1:1.760
With the BDL Enclosed belt drive the ratio works out to 1:1.444
I'll take a moment for perspective for the folks who may not understand those numbers, if your spinning the clutch end (where the starter is) at a steady 1000 RPM's, the stock chain system will turn the crank at 1760 RPM's, and this BDL system will turn is slower at 1444 RPM's, thus the starter doesn't have to work as hard to crank the engine.
As a bonus the BDL system also uses the 86 tooth ring and pinion which will also help a little.
Originally Posted by SCHMIDTY
A 1.4kW should do the trick. Or the stock starter with comp. releases. Could also use the 86 tooth ring and pinion setup with the stock starter.
Originally Posted by Alan S
My stock starter (with compression releases) cranks the 107 easily when it's cold. I think a hot start's gonna be different, though, if I ever get this critter on the road.
You both hit on something that would help, but since this engine was originally built by American Ironhorse, it's got the 96" heads and not set up for compression release. Their solution included the 86 tooth ring and pinion with the 2.0kw starter.
And Alan, hot starts are a big concern for me at this point, I can't believe this engine doesn't have any compression release, yours should be ok so long as we can sort it all out.
And don't get me wrong when I say I'm not happy with the BDL system, but there is a fair bit of pulse transfer with it and adding the 107 should (at least in my mind) add a hell of a lot of pulse. But if I'm going back to that setup, it's getting brand new hubs on both ends so I can get the smoothest ride I can get.
So my 2 day job (that's already into it's like 4th or fifth day due to being sick) is going to take another week by the time I get a new starter and hubs for the belt drive. Not to mention the cookie jar is empty. (anyone want to buy a nice cookie jar?? LMAO)
Unless anyone has another solution???