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FJR Motorcycle Forums
FAQs and Common Historical Info
Barbarian Jumper Modification for Gen II bikes
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<blockquote data-quote="ionbeam" data-source="post: 399732" data-attributes="member: 277"><p>The Barbarian Jumper was first done on a '03 bike. The guys that figured out how to activate the CO screen actually tested their bikes! They drilled the head pipes and riv-nutted in 4 'bungs' then inserted a 4 channel Exhaust Gas Analyzer to measure the real effect of the CO adjustment. They found that bumping the CO readings 7 for each cylinder took care of the lean surging and smoothed idle without taking the exhaust out of factory spec. They also found that the CO adjustment only altered emissions at very low RPMs. The effect of the CO adjustment on the '03 engine was so small that it shouldn't change gas mileage at all or effect the cats.</p><p></p><p>I'm not aware of anyone that has done the 4 bung/EGA/CO test since. The ECU and fuel pressure regulation in the Gen II is way different from the Gen I.</p><p></p><p>Normally I would say that there should be minimal change with just the CO adjustment but Wicked Webby managed to make his motorcycle run really strong with air box alterations and CO adjustments. He has Dyno slips in hand.</p></blockquote><p></p>
[QUOTE="ionbeam, post: 399732, member: 277"] The Barbarian Jumper was first done on a '03 bike. The guys that figured out how to activate the CO screen actually tested their bikes! They drilled the head pipes and riv-nutted in 4 'bungs' then inserted a 4 channel Exhaust Gas Analyzer to measure the real effect of the CO adjustment. They found that bumping the CO readings 7 for each cylinder took care of the lean surging and smoothed idle without taking the exhaust out of factory spec. They also found that the CO adjustment only altered emissions at very low RPMs. The effect of the CO adjustment on the '03 engine was so small that it shouldn't change gas mileage at all or effect the cats. I'm not aware of anyone that has done the 4 bung/EGA/CO test since. The ECU and fuel pressure regulation in the Gen II is way different from the Gen I. Normally I would say that there should be minimal change with just the CO adjustment but Wicked Webby managed to make his motorcycle run really strong with air box alterations and CO adjustments. He has Dyno slips in hand. [/QUOTE]
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FJR Motorcycle Forums
FAQs and Common Historical Info
Barbarian Jumper Modification for Gen II bikes
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