exhaust diameter

Remap My EFI After New Exhaust?

Do I remap my EFI after new Exhaust? Via Email From Our Friends at DynoJet: One big question is about re-mapping after changing the exhaust. Some say do it, other’s say it’s not necessary. More does than do not. Do I need to remap if I change aftermarket exhaust for another aftermarket exhaust? The work

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exhaust diameter

Follow Up on Bugs Be Gone

Hogger Feedback: I’ll bet you got a hundred replies, or maybe not. It’s my understanding that the ammonia that might be in Windex is harmful to our Lexan windshields. I’m not sure if that’s true, but I’m not experimenting on my windscreen with Windex or service station concoctions that might mess it up. Got almost

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exhaust diameter

Aftermarket Pipes Backfire

Our Friends at SuperTrapp had this to say: Do aftermarket pipes backfire? A backfire or “lean misfire” on deceleration is primarily attributed to an improperly tuned engine. Under this circumstance, the low speed fuel circuit needs to be adjusted. On a street bike, the rule of thumb is to adjust the fuel mixture screw out

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Two Ways to Map an EFI?

I have been told that there are two ways to map an EFI. One being to actually change the mapping of the ECU by getting a flash download. The other way is to use a piggy-back modem type device that allegedly alters the signals that are being received by the actual ECU. Provided that this

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harley speed sensor, Harley Davidson speedometer and engine issue

Performance and Match Air Intake

Q: What are some guidelines for optimum performance when matching an aftermarket air intake with either a stock H-D or other aftermarket carb on the Twin Cam?   Our Friends over at Wimmer Custom Cycles  had this to Say: Most important is maintaining the correct air to fuel ratio. Keeping in mind more air more

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harley speed sensor, Harley Davidson speedometer and engine issue

Air Filter Service

After installing a “open” performance air cleaner “filter” how often should you change the filter since it’s open to more elements?   Our Friends over at Wimmer Custom Cycles  had this to Say: That of course depends on your riding area and style. Wimmer filters never require oiling, thus they can go much longer with

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