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Originally Posted by aussieidiot
yoshi is built for suzuki. you can put them on others but they are primarily a suzuki tune shop.
oh, and Z, im yet to hear a honda with a nice all round exhaust. nothing like the pure bliss of Suzuki/Yoshi or Ducati/Termigoni
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I like the yoshi because of their build quality, and simple to fit. Their slip-ons are pretty decent for the price compared to others.
The only can that sounded meaty on a Honda as a Zook with yoshi I heard was a US exhaust D&D on the F4. But D&D makes one of the crappiest slip-ons, and the sound is only a little less loud and irritating than bike with only headers on. Generally, Hondas truly represent the term of soul of a "sewing machine." Sometimes to hear if the bike is still alive, I will purposely roll off and roll on hard to hear the airbox.
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Originally Posted by Mannyb18b
How do you tune EFI? is it very complicated?
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Basically, you have to take it to the dealer, and they'll hook up the bike ecu to a computer, and reset the fuel mapping with the new exhaust, which translates to finer atomisation of fuel spray from fuel injectors at varying degrees of atmoshperic pressure, etc, etc.
As with everything, if you know how to do it, obviously it could be easy, you just need their software and I am guessing a USB cable or some variants of it. Obviously to get the max benefit, you need the full exhaust (like titanium or carbon fiber headers and can), power commander 3 or 4 (not sure the latest version), get it dealer tuned. And for maximum results, get it dynamometer tuned with multiple testing (can be expensive and inaccurate at times). I am guessing all of this could set you back over $1k with parts and labor.
But this only improves the bikes straightline acceleration, the suspension needs to be tuned with you on it to get the full benefit of extra power.
But if you want the sound and minor gain, pick up the Yoshi slip-on and get it tuned with no more than an hour worth of labor from the dealers, it shouldn't take more than that. Fit the exhaust yourself first, and save money that way. Oh yeah, the other option is regearing the sprockets, one of the cheapest mods and delivers more noticeable acceleration for the street than anything else. The drawback is more chain wear (depending on size) and more fuel consumption.