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hope you get some detailed power and a/fr info back.....

and i hope they have dyno tires for your quad to get correct hookup to the rollers....

it would be nice to be able to add them to the list of good places to get dyno tuning...
 

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the a/fr graphs are of wide open throttle on the dyno.... i really hope they did at least ten different throttle settings and adjusted all the curve set points...otherwise you will only have wide open that is mapped right...

glad they used dyno tires.....

your best power will come from 14:1 to 14.5;1 A/FR on a yfz for sure....

you need to add +4 to +6 degrees of timing from about 5000 rpm up to the rev limit

the messed up emissions biased ports on the efi machines is what is killing the power potential of anything you add......

on that dyno you should be closer to 50hp with correct porting...leaner a/fr...and timing advance
 

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I know he explained that on the low end I was rich then mid range lean and wot was rich again before the tune.

well.... there is low end...midrange...and top end rpm for every throttle position....

thats why you map all rpms over with all throttle positions....

for a complete mapping it could take as much as 2 full hours of dyno runs and adjustments at all the throttle percentage openings on your mapping grid
 
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