The piston crown opens and closes the exhaust and transfer ports. Book also includes engine swaps for hot rods, trucks, and other ford muscle cars. Page 1 owners manual dt125r 3mb28199e7 page 2 eau00001 welcome to the yamaha world of motorcycling. The cylinder is fitted with a cast iron sleeve from the factory and is reboreable so please check your size before ordering the piston. Drawing on the authors many years of experience in tuning and modifying highperformance road, rally and race units, every aspect of an engine s operation is explained and analyzed. Discussion in technical discussions started by thomyzf, nov 4, 2010. Yamaha ds7 1972 rd 250 1973 r5c 1972 rd 350 1973 service manual. My son and i recently bought a 1980 dt 125 but it did not come with a manual. Dt100a 1976, dt100c 1976, dt125a 1974, dt125a 1976, dt100b 1974, dt125b 1974, dt125b 1976, dt125c 1974, dt125c 1976. I usually dont remove any links, once i put them up. Welcome to dtuk performance and thank you for considering us as your tuner of choice for engine tuning.
I do not host most of these, they are just links to other web sites. If you find a web site with parts or shop manuals on it let me know so i can list it here for everyone. Classic bike motorcycle service manuals for download. Yamaha dt125 dt 125 r workshop service repair manual 1988 to 2007 here. Get the best deals on motorcycle parts for yamaha dt125 when you shop the largest online selection at. The gear selector drum was repositioned from high up in the dt s casing to its new home slung below the gear cluster to make way for the balance shaft now needed to calm the high revving, but dynamically out of balance, single cylinder engine. Yamaha dt parts book list and service manuals free.
Workshop manuals and books paint products fuel and oil pipe motocross motox spare parts. Tall seat which is a mite uncomfortable and wide bars help manoeuvrability. The numbers you say that are stamped on the engine deffo come up as a 92 dt50mx, but looking at the engine id say it was a 125 engine as as far as i know there wasnt a powervalve on the 50 engine, the only think im not sure of is the head in the background doesnt look like a 125 head, the 3bn on the head would make it a 125 barrell. Yamaha dt parts book list and service manuals free download yamaha dt on going yamaha dt for sale free downloads, more added when i can, i have a few that are to big a file to ad to this page but i can email them. Here we offer a range of engine work services for the yamaha dt125r dt125x dt125re. Parts for the yamaha dt125r piston kits, dt125r gaskets. Aprilia rs4 125 engine parts bottom end aprilia rs4 125 engine parts top end. It is a musthave for tuners and calibrators and a valuable resource for anyone who wants to. As others dt is a good little streetscrambler, a duel purpose onoff road bike. Full list of motorcycle service manuals for free download. Tuning up checks runin schedule handing over the engine alternators generator and regulators. Yamaha dt tdr tzr ktm lc2 sachs zx 125 rozbieranie silnika engine disassembly. Get the best deals on complete engines for yamaha yz125 when you shop the largest online selection at.
This book explains how the efi system determines engine operation and how the calibrator can change the controlling parameters to optimize actual engine performance. Listen to the engine carefully for all of the noted symptoms while you are flying. Detailed modifications and improvements are described. Lots of people charge for motorcycle service and workshop manuals online which is a bit cheeky i reckon as they are freely available all over the internet. Designing and tuning highperformance fuel injection systems.
The yamaha dt125x is a basic motorcycle but thats part of its charm. Although identical looking to the 1978 and 79 models the final incarnation of the dt did see some minor yet crucial changes that make life hard for those searching for parts. Yamaha dt owners manuals motorcycle owners manuals. Now, on a 125 with a 250 engine, youre riding an illegally modified, unregistered motorcycle, with no insurance, that you have. Get back to the great outdoors after improving the state of your yamaha dt125 using authentic oem or aftermarket parts from, your onestop shop for all.
Decades have passed since i hung around with john and jim. Dtuk petrol, hybrid and diesel car tuning boxes are manufactured in a stateoftheart facility in germany using high quality components and connections from. Yamaha dt125 dt 125 r re x owners maintenance instruction manual here. Here you can get tips how to increase the power of the dt. Yamaha dt 125 supermoto tuning story 220ccm duration. Advanced tuning takes engine tuning techniques to the next level. Obviously its going to have a dramatic effect on bearing life and, since there are no rubber engine mounts, a dramatic increase in vibrations through the handle bars. Injection pump ve 125 c operation testing and adjustments 161 camshaft and idler gear. Yz125 2001 yamaha yz 125 engine running motor in video magneto cylinder clutch. 5 each online or download them in pdf format for free here. Li 125 to li 150 spec, other standard barrel conversions, defines stage 1 tuning on most models, carburetors, exhaust systems, port timing, gearing, disk brakes, and has a handy gear chart in the back.
How to identify an old yamaha from its engine numbers. John and i worked for the same corporation and i found a 500 triple kawasaki for him at a reasonable price. Yamaha engine numbers normally are located on the top of the crankcase, next to the clutch cover on the right side of the engine while sitting on the vehicle. Engine aircooled singlecylinder reed valve twostroke. This covers conversions from one smaller cc motor to a larger production model engine ex. The engine fitted to yamaha dt125r has a std bore size of 56. Here in germany teenagers of 16 years are allowed to drive the bike with limited power. Get the suggested tradein value and retail price for your 1974 yamaha dt125a motorcycles with kelley blue book.
Tuning for the yamaha dt 125 r is popular, of course. New material on electronic fuel injection and computerized engine. K markets, where 125cc was now pretty much the norm for learner riders. Ricambi aftermarket per yamaha motorcyclesmopeds, aftermarket parts for yamaha motorcyclesmopeds. As the owner of a dt125r, you are benefiting from yamahas vast experience in and newest tech nology for the design and the manufacture of highquality products, which have earned yamaha a reputation for dependability. Engine should be smooth and steady until you cant go higher. Dtuk performance diesel tuning boxes petrol tuning chips. The morbidelli 125 twin road racer is a rotary valve engine. Yamaha dt175 dt1c dt 175 exploded view parts diagram schematics 1972 here. Lets journey back to 1973 and read the book that was the two stroke bible of that era. Designing and tuning highperformance fuel injection systems banish, greg on.
Yamaha dt125 dt 125 re x workshop service repair manual 2005 to 2011 here. Navigate your 1978 yamaha dt125e schematics below to shop oem parts by detailed schematic diagrams offered for every assembly on your machine. I cant see how a 125 engine would fit in the 100 frame. Two stroke performance tuning a disc partially cut away and attached to the end of the crankshaft opens and closes an inlet port in the side of the crankcase. Home forums main technical discussions yzf r125 to dt125 engine swap. Get the engine nice and hot, maybe a high speed pass or something. He converted it into a drag bike, modified the engine completely and added mikuni carbs. View and download yamaha dt100a 1974 service manual online.
We specialise in performance chip tuning boxes for a huge range of vehicles. Engines back in the day didnt use to have balancer shafts. But with the age of 18 you can enjoy the full range of its engine performance. In diesem video zeige ich dir wie du mit wenigen schritten dein motorrad individualisieren kannst. Designing and tuning highperformance fuel injection. Oem is an acronym for original equipment manufacturer, which means that the 1978 yamaha dt125e oem parts offered at are genuine yamaha parts. Modular engine swaps specialist dave stribling guides you through each crucial step of the engine transplant process with insightful tips and detailed instructions, making this book a vital component to upgrading the performance of your classic mustang.
Site with technical information, pictures, videos from older yamaha dt 125, 175, 250, 400 series and the trailbikes ty175 and ty250. A reference book for the enthusiast engine tuner and race engine builder. As such its a compromise machine, a jack of all trades and master of none. Although trail bikes were never quite as popular with european riders, as it was with usa enthusiasts.
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