| 词条 | Yamaha YZ125 |
| 释义 |
| name = YZ125 | image = Yamaha YZ125 Motorcycle.jpg | manufacturer = Yamaha | parent_company = | production = 1974–Present | predecessor = | successor = | class = Motocross | engine = {{convert|124|cc|cuin|abbr=on}} single-cylinder, 2 stroke, reed valve inducted | power = {{convert|35|hp|kW|abbr=on}}[1]{{dead link|date=December 2014}} | torque =18.3 ft/lbs | transmission = 5 or 6-speed | suspension = Mono-shock, 13 inches travel | brakes = Hydraulic disk | tires = front 80/100-21-51M, rear 100/90-19-57M | top speed = {{convert|120|mph|kph|abbr=on}} | rake_trail = | wheelbase = {{convert|56.8|in|cm|abbr=on}} | length= {{convert|84.1|in|cm|abbr=on}} | width= {{convert|32.6|in|cm|abbr=on}} | height= {{convert|51.8|in|cm|abbr=on}} | seat_height = {{convert|39.3|in|cm|abbr=on}} | dry_weight = {{convert|190|lb|kg|abbr=on}} | wet_weight = {{convert|208|lb|kg|abbr=on}}[1] | fuel_capacity = {{convert|2.1|usgal|l|abbr=on}} | related = Yamaha YZ250F }} The Yamaha YZ125 is a motorcycle with a 124.9 cc two-stroke engine designed for motocross riding and produced by Yamaha Motor Company. 1973: Although very few were actually made, Yamaha did produce a YZ125 in 1973. It was not offered to the general public, but a dealer in good standing could submit a rider resume to the importer and hope to obtain a semi-works bike. However rare, this goes down in the books as the first bike with the YZ125 name. The first 2 years was made with dual rear shocks (Thermalflow shocks) and in 1975 released its first monoshock design the YZ125C and has continued production with a new model being produced every year to date. The YZ 125's produced from 1996 to 2002 are considered by some to be the best dirt bikes ever, due to its wide powerband and excellent handling.[2] The YZ125 has been ridden to five AMA National Motocross Championships, and multiple AMA Regional Supercross Championships.[3] In 2001, Yamaha released a bike designed to complement the YZ125, the four-stroke YZ250F. The two bikes shared a rolling chassis and are eligible to compete in the same racing class. However, the YZ250F has a slight horsepower advantage EngineThe YZ 125 has had a liquid-cooled 124 cc, reed valve inducted, two-stroke engine since 1981. The models from 1974 to 1980 were air-cooled and also two-stroke. It breathes through a 38 mm TMX carburetor made by Mikuni. Stock, the engine produces {{convert|32|hp||abbr=on}} at the rear wheel.[4] TransmissionThe YZ125 has been built with five- or six-speed sequential gearboxes depending on model year. The 2005 model has a constant mesh wet, multiple-disc coil spring clutch. The revised gear ratios as of the 2005 model are:
FrameFrom 1973 through 2004, the YZ 125 had a single backbone frame made from steel. It generally averaged from {{convert|176|to|198|lb|abbr=on}}. For the 2005 year, however, Yamaha switched to a single backbone frame constructed from an aluminum alloy. This frame material change dropped the weight to 190 lb.(dry weight) For 2008 models, additional weight savings in the wheel assemblies and front fork suspension have yielded additional weight savings making wet weight, no gas sub-200 lb. Aluminum framed YZ125's are notably 'flickable' and sometimes this trait is seen as a drawback since they tend to become more difficult to control on rough surfaces.[1] The 1990 yz125The 1990 has a liquid cooled 127cc engine. The best ratio for fuel mixture is 40/1 a gallon. If it has the stock original carb it has a hard time idling but can be tuned to run at hot and cold but will only idle at one or the other not both. References1. ^1 {{citation |url=http://www.yamaha-motor.com/sport/products/modelspecs/31/0/specs.aspx |publisher=Yamaha Motor Corporation, USA |title=2010 YZ125 Specs |accessdate=2009-12-05 |deadurl=yes |archiveurl=https://web.archive.org/web/20091125205822/http://www.yamaha-motor.com/sport/products/modelspecs/31/0/specs.aspx |archivedate=2009-11-25 |df= }} 2. ^FAQ'S | Motocross Action{{Dead link|date=September 2018 |bot=InternetArchiveBot |fix-attempted=yes }} 3. ^{{Cite web |url= http://www.motocrossactionmag.com/me2/dirsect.asp?sid=9945527E1D6A4953ACE23BB700C838FF&nm=EVERY+CHAMP |title= EVERY CHAMP {{!}} Motocross Action |access-date= 2007-05-09 |archive-url= https://archive.is/20120905024841/http://www.motocrossactionmag.com/me2/dirsect.asp?sid=9945527E1D6A4953ACE23BB700C838FF&nm=EVERY+CHAMP |archive-date= 2012-09-05 |dead-url=yes |df= }} 4. ^1 {{cite web | url= http://www.dirtrider.com/reviews/164_0402_jday/index.html | title= 2004 125cc-class Shootout - Judgement Day | date= February 2009 | work= Dirt Rider | first= Scott | last= Hoffman | accessdate= 14 August 2011 | deadurl= yes | archiveurl= https://web.archive.org/web/20110928224937/http://www.dirtrider.com/reviews/164_0402_jday/index.html | archivedate= 28 September 2011 | df= }} External links{{Official website|http://www.yamaha-motor.com/sport/products/modelhome/31/0/home.aspx}}{{Yamaha motorcycles}}{{Yamaha motorcycles timeline}} 4 : Yamaha motorcycles|Off-road motorcycles|Motorcycles introduced in 1974|Two-stroke motorcycles |
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