Help me with the math here... What multiplier would I use against bike weights, to calculate that bike's change in tongue weight? What's the TWM (tongue weight multiple?). I realize the bike's position on the tongue is also a factor, so presuming I could potentially do 4 bikes that's a separate variable for each; TWMa, TWMb, TWMc, and TWMd.
Bike*TWM = change in tongue weight, resulting from the bike.
So what I need to do is predetermine what I want my tongue weight to be unloaded (or with 1 propane and 1 battery), then estimate my TWM variables for each bike. Then I can work through scenarios loading from 1 to 4 bikes and calculate their net effect on tongue weight. Seems simple enough, right?
82 fj40, 99 uzj100, 06 gx470
97 DR650, 05 525EXC, 01 XT225, 09 TTR125, 07 TTR90, 07 CRF50