Tom,Larry, I had a measure up of the wheelbase today. Stock wheebase on a 1980 Suzuki GS1100ET is 61" therefore +10% = 66.1"
With the wheel fully forward in the arm its 65.1/2" at its shortest & 70.1/2" at its longest.
Hmm.. decisions decisions, I will check out the final wheelbase when I finish the engine build, then I can put all the combinations of sprockets on as I need to sort out the chain length as well.
Dr.G,n I can see your point, but we will run that ugly old tank:-) or maybe the one with the modified back.