Any Problems Yet With Drilling Holes In Exhaust - Page 9 - Yamaha Star Stryker Motorcycle Forum
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Old 12-27-2016, 06:41 AM   #81 (permalink)
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I drilled my pipes with 4 1.2 inch holes in each...if i go bigger or more do I need to worry about loss of back pressure...everything else is bone stock
Don't worry about back pressure. The cat is still there
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Old 10-04-2018, 07:56 AM   #82 (permalink)
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Just got a 2012 Stryker in immaculate condition. It has stock exhaust, and I've read the questions and replies about drilling 1/2 inch holes for improved sound. It's been my experience that any mods to stock systems cause a change in running. Did pipes on a Yamaha snowmobile, had to re-jet to prevent lean condition. Had three sets of Vance and Hines on my 2008 Fatboy, had to get an EC controller, after an EC re-map and it ran not so good under 40 miles per hour. Has anyone done the drilling and experienced any different running at low and/or highway speed?
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Old 10-13-2018, 11:12 AM   #83 (permalink)
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Just got a 2012 Stryker in immaculate condition. It has stock exhaust, and I've read the questions and replies about drilling 1/2 inch holes for improved sound. It's been my experience that any mods to stock systems cause a change in running. Did pipes on a Yamaha snowmobile, had to re-jet to prevent lean condition. Had three sets of Vance and Hines on my 2008 Fatboy, had to get an EC controller, after an EC re-map and it ran not so good under 40 miles per hour. Has anyone done the drilling and experienced any different running at low and/or highway speed?



Dont do it, dont waste your time!
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Old 10-14-2018, 02:15 AM   #84 (permalink)
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You don’t need any remapping or tuner module with your “drilled”exhaust it’ll still run good. You only need to do that if you change your intake. I personally went with Ivan’s flash and cobra exhaust.
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