This is the stock Yamaha 2 brush starter. I had to go up to a 4brush with the mods on my bike.
This would crank it fine while cold but once warmed up it would crank to slow for my liking.
Why not try this, Mr. Jayber?
Youv'e got nothing to lose, since youv'e already upgraded to a 4-pole.
If it works (I haven't done it myself), you may be able to sell the starter for a better price, or just keep it as a spare.
The pics for the alteration are well within the thread, just keep scrolling down.
Cheers! http://vmaxchat.yuku.com/topic/5158/HOT-START-PROBLEMS-ULTIMATE-FIX
I would keep it as a spare also...I still have my 2 brush from my 90 sitting in shed...might use it as a tech tool once my grandson gets old enough to learn about working on stuff...lol Plus shipping is gonna cost more than it's worth...