locate cats race prep manual (season circa '92) and use 650 full mod (f III High output) porting specs while widening rear boost windows width (W6) additional .25mm each side totaling 56.0mm overall, raising rear two upper intakes (H4-H5) 2mm ea to 51mm each,, ALSO widen W1 (exh port width) 1mm addt'l
,, then looking at rear "tangs" (cylinder extensions) that support rear skirts of pistons at BDC, starting from inner surfaces (where they're seperated approx21-22mm apart for rod clearance and flowage), remove 6mm off each side, therefore increasing width of this particular "window" to approx 34mm apart on OUTER TANG SURFACES (outer radiuses) while keeping corresponding previously "parallel flats" still Parallel flat with ea other,,,clutch for 9-9100 (hot pipe), 8850-8950 cold (short runs), 44mm mikunis with 680 mains (-10* to +20* @ 200' above sea level), 35 pilots, needles and spraybars were as folows,, BB-5 sparybars, 7DH2 needles, clip in MIDDLE position
, this carburetion was run with NO ram stacks, filters, airbox,,,, NOTHING! Try to call Doo's race team in Valcort, Queb., locate Yvonne Gagne (their pipe man) have him build you a set of pipes replicated dimension volumetric wise
to team Spencers oval sled from 91-93 only have him form them to fit for afs chassis instead of aws
,, engage minimum 5500 with belt side clearance of at least .085" to max of .120" and bolt your hands to handlebars with any kind of adequate traction
(it was one hell of a ride)
EDIT: i've looked up needles and spray bars << DONE 10/23/2008 Hopefully, this will help you out (or anyone else wanting to do something like this setup) Oooops! forgot to throw in that it had "stuffed crankcases" as well (in side transfer window area)
Trigger finger's getting itchy, so don't entice me....
If it's cnote approved it will work good
That is freeking sick man........
0637-185: '99 Sno-Pro APV (guide and button) update kit p/n...
0637-186: '99 Sno-Pro APV superseded valve inserts update kit p/n...
"Arctic Chat is not affiliated with Arctic Cat Inc. in any way, shape or form. We are an enthusiast site run by fans."
(Are you experiencing issues with your local dealer? Feel free to call Cat Consumer Complaint @ 218-681-8558)