Bouncy idle, shitty gas mileage, no power under 7k, hard to start and so forth. Yamaha have had a difficult time trying to get yamaha to check, and or repair my engine. Yamaha was the first to develop such a system, called the exhaust ultimate power valve exup. This simple plugandplay application allows removal of the exup valve and motor without setting the dreaded check engine light when using a fullracing exhaust. Yamaha adopted the 5valve concept, using three intake valves and two exhaust valves per cylinder, because it allowed both excellent volumetric efficiency and high rpm. Proper functioning of the valve is important to engine performance but, inexplicably, maintenance of the valve does not feature in yamaha s routine maintenance schedule. Yamaha use the exup valve so they can have a highly tuned top end yet with the exup valve they can change the exhaust characteristics so as to not lose any bottom or mid range.
The exhaust valve exup cables control the valve which varies exhaust back pressure. Your experience with valve trains should agree with that. Normal used part, can be installed without problems. Exup exhaust ultimate power valve a device fitted to selected yamaha motorcycles fzr,yzf,xv1900,r series that constantly adjusts the internal diameter of the exhaust system to suit engine revs. This model is the result of yamahas vast experience in the production of fine sporting, touring, and pacesetting racing machines. It represents the high degree of craftsmanship and reliability that have made yamaha a leader in these fields. The fzr and thunderace among others share the venerable 5 valve genesis engine. Used and new motorcycle exup valve parts for yamaha r1 search results for motorblok incl elektronica, electronics, exup valve page 1.
R1 exup valve adjustement pnw riders the motorcycle. It is equipped with downdraught carburettors, throttle position sensor, gear position sensor, and a torqueboosting exup system for low to midrange performance with 145 bhp at 10,000 rpm. The dohc genesis engine has five valves per cylinder and downdraft carburetors. Exup valve yamaha r1 20002001 201056421 motorparts. Graves motorsports exup servo eliminator yamaha r1 r1m r6 fz1 vmax wr250. Proper functioning of the valve is important to engine performance but, inexplicably, maintenance of the valve does not feature in yamahas routine maintenance schedule. The graves motorsports universal exup eliminator is a simple plugandplay application that allows the removal of the exup valve and motor without causing the check engine light to be activated when using a full racing exhaust. The system appeared more than two decades ago on a 1987 yamaha fzr400r. Hi all, my r1 has a big stuttery hole in the power delivery, but is fine once you get high up in the revs. When you purchased your bike, they probably offered you the optional service plan.
This engine is very powerful in stock form, being one of the fastest bikes of its time. Exup valve working fine, removed it for routine maintenance put it all back together again with a little copperease and wallop the bloody thing wont move jammed solid so rinse and repeat same story the valve seems to work fine right up until i tighten the bolts itll turn then stick as if its bent or off centre somehow. Show full signature chris 2004 bmw r1100s previous rides. I replaced the exup on both of my r1s 5jj carbs and 5pw injection with race hindle headers, the 5jj gave more power through out the rev range 73 torque and 2 bhp with exup to 79 torque and 144 bhp with hindle headers and about 1 hour dyno time, i havnt dynoed the 5pw yet, i think if you want to remove the exup i would fit either race headers or wire it open, i know its a fazer. Exup valve maintenance fazer owners club tapatalk. A forum community dedicated to all motorcycle owners and enthusiasts. Exup valve maintenance the exhaust ultimate power valve exup alters the back. The pulley wheel has 2 lobes these should be either side of a holerecess the hole is for calibration, presumably in the factory with a setting pin, rev it up over 6000 rpm and the pulley should be rotated by the cables attached at the. This service manual contains information regarding periodic maintenance to the emission control. A new 10hole injector replaces the 12hole one used on the 2019 r1 with the spray now angled much more steeply toward the intake valve for better atomization. Not only that, we found it is highly reliable, responds very well to modifications and tuning and can be used in the most. This ensures good low to midrange performance for a linear power output all. Opinionscomments expressed on this site are not that of yamaha or any other yamaha subsidiary or affiliated company. The haynes manual for the early model r1s which have an.
Exup valve maintenance the exhaust ultimate power valve exup alters the back pressure in the exhaust system at various revs. As designers began to appreciate the benefits of multivalve layout, 4valvespercylinder and even 3valves became. Discussion in apex general talk started by yooper1, feb 10, 2014. Adjusting your 07 xjr0 exup valve cables posted in enginecarbsf. Anybody got rid of the exup valve and lived to tell the tale.
The reason yamaha is rejecting your request is legitimate. So eddie disconnected the cables and wired her open at my request so i could ride it. Shop revzilla for your bazzaz exup servo eliminator yamaha r6 r1 fz1 vmax today. Its been suggested to me that this is probably due to a jammed exup valve. The exup servo is responsible for closing a valve in your exhaust to create a known amount of backpressure in the exhaust system to allow the engine to work in the way it was designed. The haynes manual for the early model r1 s which have an identical exup system recommends checking cable adjustment every service 4k or. Adjusting your 07 xjr0 exup valve cables enginecarbs. The reason i am asking is, there is no mention about greasing exup valve in shop manual or owners manual. The yzfr1 has a carbon muffler that may change color. At the top, the r1s intake ports have been shortened and the intake volume reduced by 12 percent. On the yamaha r6 models 0614 the m4 slip on will eliminate the exup valve. Took to otd and they found that the exup valve was stuck 14 open. Disconnecting the exup system yamaha workshop yamaha.
All they say is how to keep cables adjusted which is simple and easy. It is controlled by the ignition module via a servo motor and two cables. The exup adopted on the yzfr1 has evolved to the point where input on five different parameters are used to regulate the controller. Since ive disconnected the exup valve the tacho needle goes nuts. The exup valve, is a variable restictor in the exhaust system looks a bit like the thames barrier, take your silencer if and look down tha pipe with a torch you should be able to see it. What does an exup servo and subsequently exup eliminator. I know this is because it thinks theres a problem with the exup, how can i make the bike ignore it. By removing the moving vane that opens and closes at specific revs,the engine no long has this restriction in the collector to reflect back to the engine to help with. Discussion in apex general talk started by blue rider, sep 23. The powervalve exhaust ultimate powervalve is set into the primary length of the exhaust in order to help boost power throughout the rev range using long duration camshafts. What is the spec adjustment on the exup valve ty4stroke.
It controls thhe exup valve in the 06 and up exhaust system. The yamaha engineers have spent extensive research and money on the exup valve and exhaust system. Slinky glide develop exup and set cables the wemoto weblog. It appears that software on your computer is blocking javascript. As a matter of fact they refer to 19982000 r1 but an exup valve is an exup valve, right. Bazzaz exup servo eliminator yamaha r6 r1 fz1 vmax. Come join the discussion about performance, track racing, modifications. Eau15281 eau15301 luggage strap holders exup system sidestand this model is equipped with yamahas the sidestand is located on the left side exup exhaust ultimate power valve of the frame. Highlift camshaft, valve spring highlift specification when using these camshafts, the valve springs should also be those in the kit. Note that haynes and yamaha manuals both state that copper grease is fine for this application. The motorcycle is powered by yamahas 1002 cc 20valve forwardslanting liquidcooled fourcylinder engine. It first appeared on the yamaha fzr exup and was later used on many other yamahas. This system boosts engine lower it with your foot while holding the power by means of a valve that regu vehicle upright.
Yamaha would not have added any of it if there was no benefit. Disconnecting yamaha exup valve to fit race exhaust. The first time yamaha ditch their fivevalve system in favour of a more popular fourvalve arrangement in the r1. Buy 20152018 yamaha r1 r1m r1s fz 10 mt 10 decat exhaust pipe. The valves are supposed to be adjusted at certain intervals. Graves motorsports exup servo eliminator yamaha r1 r1m. If you do not want the light on the dash, you will have to run the eliminator. If you have swapped your exhaust then chances are you have already eliminated the exup servo. The first fourstroke power valve device appeared on the yamaha fzr exup exhaust ultimate power valve, constantly adjusting the internal diameter of the exhaust system to match the engine speed.
Later versions from honda went by the names honda titanium exhaust valve htev and honda variable intakeexhaust hvix, appearing on the cbr600rr and honda cbr929rr. When used in races, riders must mount the yzfr1 racing kit at their own discretion after checking the rules of competition issued by the sponsor. Exup and later, suzuki set valves are controlled with exhaust valve push and pull cables, which until now were only available from the original equipment. It consists of a gate valve in the exup housing, the cast exhaust section immediately behind the headers and below the engine. Congratulations on your purchase of the yamaha yzfr1xc. The 2020 yamaha r1 is forged from the technology and development gained from.
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