Harley Tips

Since 2004 our crew has been answering Harley Davidson how to technical questions and posting them here for all to learn from. Our Harley Tips page grows every day. From easy questions about battery and charging systems to in-depth questions and answers about cam chain tensioners and transmissions. Make sure to click on the Tags in the topics that you are interested in to see more questions, answers and of course related videos. Wrench Safe

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EFI Mapping

I want to know about EFI Mapping. I have a V and H fuel pack right now, should I get a Power Commander or Race tuner, or keep what I have? I have V and H true duel exhaust on a 2006 eglde classic. The fuel pack is actually a pretty decent basic system that…

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Performance Pipes for 2008 Heritage

I’m considering performance pipes for 2008 Heritage softail. I really like the true dual look—fish tails are neither here nor there. I really want to increase low-end power and cool the bike off as much as possible. I’m really looking for advice on a complete Stage 1 make-over. I THINK I’d prefer the Bassani true…

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Pros Cons of Breather Systems

My present breather setup vents to the atmosphere. Other breather setups vent into the carb. What are the pros and cons of both systems? What is available that will vent outside the carb, but will be caught without venting to the atmosphere? From Wimmer Custom Cycle: We hold a patent on our head breather system.…

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Darn Crankshaft Sensor

I read an article on the tech site about running a hot wire to the white wire on your coil plug. I have got 12 volts at that point, if it still does not make the coil fire then does it mean I have a bad coil? If so, is there a remote possibility that…

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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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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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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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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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New Exhaust Boost Performance Warranty Issue?

I just traded my 01 Sporty for a 07 FXD. The bike’s great, except it is way too quiet. What can I do in terms of performance and a much louder sound, without loosing my factory warranty? Will new exhaust boost performance and sound without loosing warranty? Via Email Our Friends at SuperTrapp had this…

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