help junk the hac

karnedge · Feb 15, 2009

trying to help a buddy out here..his wife rides a 98 670 sumt.. the hac is doing so strange crap..so we want to pull it..jet for where she rides and run it..but where do all the lines go? we pull the vac line but then it dont pull revs..anyone that can help..please

banditpowdercoat · Feb 15, 2009

you need to plug the vac line. remove the carb vent lines just have them drop besides the carbs like a NON HAC carb. AND then, rejet. HAC equiped sleds are jetted for -40, really fat.

BTW, If you wana get rid of the HAC, I may be interested.

Shylohdog · Feb 15, 2009

I did it to a 97 Summit 500 and it made a huge difference. Just block the vac line and you are ready for jetting. Can't remember what I put in it but I am sure someone on here will know.

karnedge · Feb 16, 2009

banditpowdercoat said:
you need to plug the vac line. remove the carb vent lines just have them drop besides the carbs like a NON HAC carb. AND then, rejet. HAC equiped sleds are jetted for -40, really fat.

BTW, If you wana get rid of the HAC, I may be interested.

so both jets? mains and piolts are that fat? it has a rich bog from 1/4 to 1/2 ..allways has

Coldfinger · Feb 16, 2009

HAC calibration

There is a way to check the calibration on the HAC canister. This is considered a routine maintenance item per BING, the OEM.

Simply measure the the depth of the needle, in mm, then using your present altitude, barometric pressure and air temp, there is a chart that shows what the measurement should be.

If you need more info let me know. There is another thread or two here where I provided more info as well.

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help junk the hac

karnedge

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banditpowdercoat

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Shylohdog

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karnedge

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Coldfinger

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