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FJR Motorcycle Forums
FJR Parts & Accessories Discussions
Exhaust,Fuel Management, & Intake
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<blockquote data-quote="HotRodZilla" data-source="post: 941113" data-attributes="member: 13519"><p>The only exhaust system that is going to yield any increase in HP will be a full system that includes the headers. Like a Muzzy or a HoleShot. The cats are in the OEM headers, so you gotta get those out of the way for any real increases.</p><p></p><p>Every fuel management system I have seen for the FJR only deals with fuel mapping, not spark control. I don't know if I have ever seen a FI management system that messes around with spark instead of fuel. I know they are out there, but never seen one for a bike.</p><p></p><p>Seems the best fuel system managers are the PowerCommander5 with the Auto Tune, and the Motty system used by UselessPickles.</p><p></p><p>There is a lot of discussion about K&N filters, and no agreement. Some say they suck, and others swear by them. Some claim they'll lead to premature entine wear and oil clogging the throttlebody system, and some saying they wont. many of us have tried either K&N or Uni filters and gone back to OEM. There's not enough felt difference to deal with the side effects...Real or imagined.</p><p></p><p>Regardless of what you do, it is a lot of money output for a very small gain in HP. You need to search for UselessPickles threads and see the mods he did and undid while measuring gained output. The gains were very modest, and cost lots. Most of us don't think it's worth it. The gains will mostly show up at full throttle, or very high RPMs, where we spend very little time.</p><p></p><p>Either way, FJRay is right. Without a good tuner that knows what he's doing to get it all to flow right, none of it means crap.</p></blockquote><p></p>
[QUOTE="HotRodZilla, post: 941113, member: 13519"] The only exhaust system that is going to yield any increase in HP will be a full system that includes the headers. Like a Muzzy or a HoleShot. The cats are in the OEM headers, so you gotta get those out of the way for any real increases. Every fuel management system I have seen for the FJR only deals with fuel mapping, not spark control. I don't know if I have ever seen a FI management system that messes around with spark instead of fuel. I know they are out there, but never seen one for a bike. Seems the best fuel system managers are the PowerCommander5 with the Auto Tune, and the Motty system used by UselessPickles. There is a lot of discussion about K&N filters, and no agreement. Some say they suck, and others swear by them. Some claim they'll lead to premature entine wear and oil clogging the throttlebody system, and some saying they wont. many of us have tried either K&N or Uni filters and gone back to OEM. There's not enough felt difference to deal with the side effects...Real or imagined. Regardless of what you do, it is a lot of money output for a very small gain in HP. You need to search for UselessPickles threads and see the mods he did and undid while measuring gained output. The gains were very modest, and cost lots. Most of us don't think it's worth it. The gains will mostly show up at full throttle, or very high RPMs, where we spend very little time. Either way, FJRay is right. Without a good tuner that knows what he's doing to get it all to flow right, none of it means crap. [/QUOTE]
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FJR Motorcycle Forums
FJR Parts & Accessories Discussions
Exhaust,Fuel Management, & Intake
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