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FJR Motorcycle Forums
Technical & Mechanical Problems
FJR Dyno Tuning & Electroninc Control Unit Flashing
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<blockquote data-quote="ionbeam" data-source="post: 1304996" data-attributes="member: 277"><p>^^^^ Go take a read from uselesspickles IIRC. I can tell ya that the FJR is fairly well optimized right from Yamaha, you will be digging and scratching for 1-2 hp at a time. There isn't much that can be done that is significant without access to the spark map or revised cams. Headers, cat removal, exhaust and intake tuning as a <em>system</em> not something cobbled together, along with a PCIII tuned on a dyno will get something like 8-10 hp and a few pounds of weight savings.</p><p></p><p>I've seen a lot of the little things done and then run down the track at New England dragway and there wasn't a whole lot of gain for a whole lot of work. We worked in stages making a change and three runs, a change and three runs. We got perhaps close to a 0.2 second 1/4 mile elapsed time improvement -- but the gain came with the ambient dropping from 75° to 50° which would also almost exactly explain the improved times <img src="https://www.fjrforum.com/forum//public/style_emoticons/default/laugh.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /> If you want to be fast for a very short time until something BAD happens, try NOS <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" /></p></blockquote><p></p>
[QUOTE="ionbeam, post: 1304996, member: 277"] ^^^^ Go take a read from uselesspickles IIRC. I can tell ya that the FJR is fairly well optimized right from Yamaha, you will be digging and scratching for 1-2 hp at a time. There isn't much that can be done that is significant without access to the spark map or revised cams. Headers, cat removal, exhaust and intake tuning as a [I]system[/I] not something cobbled together, along with a PCIII tuned on a dyno will get something like 8-10 hp and a few pounds of weight savings. I've seen a lot of the little things done and then run down the track at New England dragway and there wasn't a whole lot of gain for a whole lot of work. We worked in stages making a change and three runs, a change and three runs. We got perhaps close to a 0.2 second 1/4 mile elapsed time improvement -- but the gain came with the ambient dropping from 75° to 50° which would also almost exactly explain the improved times [IMG]https://www.fjrforum.com/forum//public/style_emoticons/default/laugh.png[/IMG] If you want to be fast for a very short time until something BAD happens, try NOS ;) [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
FJR Dyno Tuning & Electroninc Control Unit Flashing
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