![]() One significant reason for dyno-tuning at this point in the modification process was to see just how close I could get to other WR’s with an aftermarket (see: expensive) exhaust system.My story begins with a call to the shop that has a dynamometer. If you chose to read any further, grab a cup of coffee and a hanky or two, and be prepared to find either a comedy of errors or a tragedy of incompetence.I’ll start with a quick recap of the mods done to my WR250R: Power Commander III USB (with PC IV software cut and pasted into it), opened the air box, pulled the EXUP system and installed the 12 O’clock Labs replacement module, gut the stock exhaust including catalytic converter, and opened the exhaust tip to 1 1/8th inches. Or in this case, and old man and his dual sport. Sooo, from here I’ll go into that, but I’ll warn you now, it’s a long sad story about a boy and his dog. ![]() ![]() Would I recommend that anyone else with an EFI controller and/or any other mods done, dyno-tune their bike? YES, without hesitation. The increase in power and fuel mileage makes me strongly believe that my bike is running at its peak performance, which should only add to its reliability and longevity. Power is up noticeably, and fuel mileage went from as low as 36 MPG to between 45 & 50 MPG, depending on how I ride it. Ah, but wait, there’s more incompetence to come!!!But before I go there, the bottom line is that I am extremely pleased with the end result, regardless of the dyno numbers. Then he asked me if it was “a street legal bike”, and all assumptions about his expertise on my bike when right out the window. Based on this and some other comments he made about the WR, I assumed he was some sort of an expert on the bike. (Editor’s note: There’s a longstanding debate over the validity of ‘claimed horsepower’ by manufacturers, with many believing the numbers have been fudged to help sales figures) I sort of mentioned this to the “technician/shop owner” that ran my bike, and got a definitive, “No, they don’t”. What the hell? Did all my mods result in an overall power loss? Thought I’d read in several publications that a stock WR250R was putting out somewhere in the neighborhood of 24 HP. I learned a lot throughout the process, but the most important lessons I learned were: any moron can buy a dynamometer but that doesn’t necessarily mean he’s proficient with it, and sometimes numbers are just numbers.I should probably start at the beginning of the process, but I’m impatient, so here’s a printout of the end result: Yes, you’re reading that correctly: 22.5 HP between 8 & 9,000 RPM. If you choose to do business with this business, please let the business know that you contacted BBB for a BBB Business Profile.Īs a matter of policy, BBB does not endorse any product, service or business.Contributing Writer: Frank MortonAfter much careful deliberation (meaning a long period of indecision) I decided to have my Yamaha WR250R dyno-tuned, so I scheduled an appointment. BBB Business Profiles are subject to change at any time. When considering complaint information, please take into account the company's size and volume of transactions, and understand that the nature of complaints and a firm's responses to them are often more important than the number of complaints.īBB Business Profiles generally cover a three-year reporting period. However, BBB does not verify the accuracy of information provided by third parties, and does not guarantee the accuracy of any information in Business Profiles. ![]() BBB asks third parties who publish complaints, reviews and/or responses on this website to affirm that the information provided is accurate. BBB Business Profiles may not be reproduced for sales or promotional purposes.īBB Business Profiles are provided solely to assist you in exercising your own best judgment.
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