i. It actually injects air into the exhaust stream to provide oxygen for the cat process. WR250R / X Links Yamaha WR250R and WR250X forum-> For Sale-> WRR/X Exhausts for sale. The use of metal-cutting tools (e.g. Any comments/suggestions on my planned engine setup? (Editor’s note: while Frank was the same – salty, surly, and slightly smelly, his bike was definitely improved and empowered. - Catalytic converter removed from stock silencer - AIS/smog removed - EXUP disabled Cash only. It features a cleanable screen-type spark arrestor. So, what is an exhaust servo / EXUP valve?. Below is a list of modifications made to my recently-acquired WR250R, done by the previous owner. emery cloth) to clean the surfaces can damage them and lead to leaks or engine damage. Rather than being a primary emission control device, the secondary air injection system was adapted to support the efficient … I emailed IMS to see if the 4.7 gallon tank would fit a 2016 WRR. Keep: EXUP, flapper and stock airbox. Does anyone know if it will fit. e. Remove the muffler. I mean gas is already over $6 gallon here. Step 5 – Complete the installation Raise the truck back up and remove the jack stands. The failure of motorists to detect and recognize motorcycles in traf- Hope there's still gasoline available in 2025. Total cost, about $280. Getting to the dirt has never been more exciting… You are looking at a new breed of high performance dual sport machine. This is one reason you get popping on the bike when you go with an aftermarket pipe and don't remove the AIS. The use converter in the exhaust system. Using a catalytic converter and taking away the air and adding more fuel also it would not be possible for the cat itself it run cooler. Start A New Topic Reply Printer Friendly. Located just down the pipe after the end can (muffler) link pipe, the catalyzer is for emissions control in areas where bikes are required to undergo emissions testing. I don't know how much additional work removing the AIS puts on the converter. h. Remove the two nuts securing the rear exhaust pipe connected to the OEM Catalytic converter. The instrument cluster on your Ford is a common failure. WNY hills of Wyoming County, maple syrup & cheese! Over the forthcoming months I shall be making further modifications - removing or swapping current parts and adding others - to maximise the bike for lightweight overlanding, whilst maintaining it's inherent capability as an off-road machine. 2. is in safe operating condition. Post Info ... You will need to unplug the O2 sensor and remove the exup cables as they don't fit with this exhaust. Heya rsteiger, my bike does exactly the same, slightly boggy when cold then perfect when warm, ...almost like a carby (if anyone remembers what they are LOL). I average about 50 mpg overall. Read this manual carefully before operating this vehicle. As for Cali, I'll bet there is a inspection/test coming any year now. Lightweight exhaust system features a stainless steel header pipe and a compact 3-stage expansion type upswept muffler with a honeycomb catalytic converter to reduce exhaust emissions. Lightweight exhaust system features a stainless steel header pipe and a compact 3-stage expansion type upswept muffler with a honeycomb catalytic converter to reduce exhaust emissions. This system maximizes engine power and allows hassle-free replacement of the oil filter. The exhaust system is hot after op- … Add: PC fuel controller and TwinAir air filter. Air … I’m as skinflint as they come, but for the few bucks this thing costs, it’s probably a tool worth picking up. ... does not make it a binding EPA system like a catalytic converter. We carry all Healtech products: gear indicators, quick shifters, SpeedoHealers, shift lights, timing retard units and more. My 01 has the catalytic converter too; and yes, it's a 6speed, with the 275HP engine. T No Power To Oxygen Sensor Honda Civic Forum. Damage inc. said: Thanks for your responses guys ... And yes this is my way of retaining the yamaha technology whilst removing the unwanted catalytic converter. The catalytic converter will convert those HCs if the AIS system isn't burning it in the header. Remove fine backlogs from the sealing surfaces of the cylinder head and the crankcase using special tool 0 495 104 (11 4 472) . Discussion in 'Thumpers' started by Sock Monkey, Apr 7, 2008. WR250R, wr 250, wr 250r Location: Lake Elsinore; Price: $6500; Read more... Yamaha modded street fully Sponsored Link 2008 Yamaha WR250R . Add: PC fuel controller and TwinAir air filter. It's only function is to get the catalyst in the muffler up to operating temperature faster after a cold engine start. Hello. Remove: AIS and catalytic converter. As emission control strategies grew more sophisticated and effective, the amount of unburned and partially burned fuel in the exhaust stream shrank, and particularly when the catalytic converter was introduced, the function of secondary air injection shifted. The mass airflow sensor tells the car’s computer to add the proper amount of fuel based on the air coming through to the engine. Not only did his WR250R keep pace on a two-track long uphill grade with my more masculine 400 cc power plant, it stayed much lower in the RPMs than in previous similar conditions, making it sound like an actual motorcycle instead of a wound up … is in safe operating condition. INSTRUMENT AND CONTROL FUNCTIONS EAU13433 ECA10701 EAU46280 Catalytic converter Seat NOTICE This model is equipped with a catalytic Use only unleaded gasoline. It features a cleanable screen-type spark arrestor. This could be anything from a clogged catalytic converter to a worn... Read more Coolant light keeps coming on. I also do a 50/50 miss of dirt/road, with a big part of the road being high speed interstate. Some info on the adjustment from the WR250R forum: I do, but I think gasoline will be the exception for you and I in this hydro rich province soon enough. Exhaust gases are at their hottest as they leave the combustion chambers. Failure to inspect or maintain the vehicle properly increases the possibility of an accident or equipment damage. If, like in the UK, this is not required for bikes, you can remove it to increase exhaust flow and see a slight increase in power and torque. Second, the stock pipe has a catalytic converter in it and the AIS is needed to help the cat burn off the un-burnt hydrocarbons from the engine exhaust. The air injection system (AIS) is designed to introduce clean air to the engine exhaust as it exits the exhaust manifold or exhaust headers. It is unlikely that if you remove air injection and add fuel for it not have detrimental effects on the cat. Just like removing your catalytic converter or using software to over-ride an emissions control system. This motorcycle is designed to car-ry the operator and a passenger. Diletantte, If I remember correctly, the AIS is regulated by a valve that is electrically operated. Because it does not have any effect on the fuel mixture being fed into the engine, no programmer is needed. Removing spring hooks: I’ve quickly fabricated make-do tools over the years to do this, and they have all gotten the job done, but an actual, made-for-the-task spring hook tool really is a nice thing to have. Got to be closer than removing it all together and tricking the warning lights to not show up. You may want to look at adjusting the CO value to help improve off idle response first since that is a free change to make. Many cars have similar systems to get oxygen to the catalytic converters so the breakdown can happen. Inspired by our legendary WR line, the all new 2008 Yamaha WR250R is a machine that offers incredible performance on the road and off. Do not use any metal-cutting tools. The CARB has a real hard on to get diesel soot emissions lowered or eliminated.. See page 5-1 for a list of pre-operation checks. This motorcycle is designed to car-ry the operator and a passenger. 2008-18 Yamaha WR250R / WR250X. identify and clean a dirty MAF sensor (Lexus) P0420 How To Diagnose A Bad Catalytic Converter -EricTheCarGuy How to Test an Alternator (Testing the Voltage Regulator, Diode rectifier and Stator) GTI TRANSMISSION REPAIR DIFF BEARING AND OUTPUT SHAFT BEARINGS Clear check engine light for less than 5 dollars SALVAGE HAIL DAMAGE CAR … j. Remove the rear exhaust pipe. Then again, I'm 215 lbs without gear. Once you have access to the mass air flow sensor, carefully remove any larger pieces of dirt such as leaves or small stones etc. I've never seen close to 70 mpg. Manual removal of catalytic converter. Lightweight exhaust system features a stainless steel header pipe and a compact 3-stage expansion type upswept muffler with a honeycomb catalytic converter to reduce exhaust emissions. 2008 Yamaha WR250R – 2008 Yamaha WR250R. It features a cleanable screen-type spark arrestor. You may need to remove the air filter box completely. Healtech Exhaust Servo Eliminator (ESE). 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. This system maximizes engine power and allows hassle-free replacement of the oil filter. I have fitted a Q-Tip to the silencer. f. Unhook the hanger located on the rear exhaust pipe that was connected directly to the muffler by flipping the rubber isolator up. 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