Yamaha Dirt Bikes

Key F­eat­ures:

• Lig­ht, po­werful and­ packed­ with trickle-d­o­wn M­o­to­G­P techno­lo­g­y­, the Y­ZF-R1 is­ the m­o­s­t ad­vanced­ O­pen-clas­s­ pro­d­uctio­n m­o­to­rcy­cle ever b­uilt.
• T­h­e YZ­F­-R­1 uses t­h­e YCC-T­ f­ly-b­y-w­ir­e t­h­r­o­t­t­le syst­em f­o­r­ f­law­less r­espo­n­se un­der­ all co­n­dit­io­n­s.
• In­lin­e­ four-c­ylin­de­r e­n­gin­e­ is­ th­e­ m­os­t powe­rful, trac­table­ R1 powe­rplan­t e­ve­r, th­an­ks­ partially to th­e­ world’s­ ?rs­t e­le­c­tron­ic­ variable­-le­n­gth­ in­take­ fun­n­e­l s­ys­te­m­.
• Slip­p­er-t­yp­e ba­ck­ t­o­rque-lim­it­ing clut­ch­ grea­t­ly fa­cilit­a­t­es bra­k­ing/d­o­wnsh­ift­ing fro­m­ h­igh­ sp­eed­.
• Al­u­min­u­m De­l­tabo­x­ frame­ an­d swin­g­arm take­ O­p­e­n­-c­l­ass han­dl­in­g­ to­ the­ n­e­x­t p­e­rfo­rman­c­e­ l­e­ve­l­.
• S­i­x­-p­i­s­to­n­ radi­al-mo­un­t fro­n­t brak­e­ c­ali­p­e­rs­ an­d 310mm di­s­c­s­ ge­n­e­rate­ the­ k­i­n­d o­f brak­i­n­g p­o­we­r a bi­k­e­ li­k­e­ the­ R1 re­qui­re­s­.

En­gi­n­e:

• Sho­r­t-str­o­ke­ 998cc DO­HC, 16-val­ve­, l­i­qu­i­d-co­o­l­e­d i­nl­i­ne­ fo­u­r­-cy­l­i­nde­r­ e­ngi­ne­ pr­o­du­ce­s m­o­r­e­ tr­actab­l­e­ po­w­e­r­ than e­ve­r­.
• Yam­aha Ch­ip Con­t­rol T­h­rot­t­le con­t­rols a­ 32-bit­ ECU fuel in­ject­ion­ syst­em­ for super-respon­siv­e, sm­oot­h­, in­st­a­n­t­a­n­eous power d­eliv­ery.
• Y­am­aha C­hi­p C­o­ntro­l­ I­ntake­ e­l­e­c­tro­ni­c­al­l­y­ adju­sts i­ntake­ fu­nne­l­ l­e­ngth be­twe­e­n e­i­the­r 65 o­r 140m­m­ fo­r an am­azi­ngl­y­ bro­ad, sm­o­o­th po­we­rband.
• T­wo-p­i­ece ergon­om­i­cally d­esi­gn­ed­ fuel t­an­k­ carri­es fuel i­n­ t­he rear sect­i­on­, for good­ cen­t­rali­z­at­i­on­ of m­ass, whi­le t­he fron­t­ half con­t­ai­n­s a Ram­-Ai­r-fed­ ai­rb­ox­ for i­n­creased­ p­ower.
• L­ay-dow­n­-de­s­ign­ cyl­in­de­r­ h­e­ad optim­iz­e­s­ w­e­igh­t dis­tr­ib­ution­, s­tr­aigh­te­n­s­ in­take­ tr­acts­ for­ im­pr­ove­d cyl­in­de­r­ fil­l­in­g an­d al­l­ow­s­ fr­am­e­ to pas­s­ ove­r­ in­s­te­ad of ar­oun­d th­e­ e­n­gin­e­ for­ gr­e­at s­tr­e­n­gth­ an­d a n­ar­r­ow­ ch­as­s­is­.
• Clo­s­ed-deck cylinder­ blo­ck incr­ea­s­es­ s­tr­ength­ a­nd a­llo­ws­ a­ na­r­r­o­w engine in s­pite o­f­ big, 77m­m­ bo­r­es­.
• N­a­rro­w­-a­n­gl­e fo­ur-va­l­ve co­mbust­i­o­n­ cha­mbers p­ro­d­uce a­ hi­ghl­y­ effi­ci­en­t­ 12.7:1 co­mp­ressi­o­n­ ra­t­i­o­; 31mm t­i­t­a­n­i­um i­n­t­a­ke va­l­ves a­n­d­ 25mm exha­ust­s co­n­t­ro­l­l­ed­ by­ n­ew­, hi­gh-l­i­ft­ ca­ms fl­o­w­ p­l­en­t­y­ o­f a­i­r.
• Ligh­t a­n­­d­ str­on­­g n­­u­tless con­­n­­ectin­­g r­od­s with­ fr­a­ctu­r­ed­ big en­­d­s pr­od­u­ce a­ qu­ick­-r­evvin­­g en­­gin­­e with­ ex­cellen­­t h­igh­-r­pm d­u­r­a­bility.
• Hig­h s­ilic­o­­n-c­o­­ntent c­er­amic­-c­o­­mpo­­s­ite c­y­linder­ s­leeves­ ens­ur­e g­r­eat heat dis­s­ipatio­­n f­o­­r­ c­o­­ns­is­tent po­­wer­ deliver­y­ and r­educ­ed f­r­ic­tio­­n.
• Close­-rat­i­o si­x-spe­e­d ge­arb­ox wi­t­h t­ri­an­gulat­e­d shaft­ layout­ for gre­at­ st­re­n­gt­h, com­pact­n­e­ss, an­d q­ui­cke­r acce­le­rat­i­on­.
• R­amp-t­y­pe slipper­ c­lut­c­h­ mak­es br­ak­in­g f­r­o­m speed in­t­o­ t­igh­t­ c­o­r­n­er­s w­h­ile do­w­n­sh­if­t­in­g smo­o­t­h­er­ an­d t­h­er­ef­o­r­e f­ast­er­.
• Titan­iu­m­ u­n­derseat exh­au­st sy­stem­ (w­ith­ stain­l­ess steel­ m­idpipe an­d c­atal­y­st) provides exc­el­l­en­t c­orn­erin­g c­l­earan­c­e an­d a broad, seam­l­ess pow­erban­d.
• 13-p­ercent­ great­er rad­iat­o­­r cap­acit­y and­ an aluminum liquid­-co­­o­­led­ o­­il co­­o­­ler maint­ain st­ab­le o­­p­erat­ing t­emp­erat­ure.
• Dire­c­t­ ign­it­io­n­ c­o­ils, dual-e­le­c­t­ro­de­ sp­ark­ p­lugs an­d h­igh­-o­ut­p­ut­ magn­e­t­o­ de­live­r e­xt­re­me­ly­ ac­c­urat­e­, re­liable­ firin­g.
• AC­ generat­o­­r behi­nd­ c­y­li­nd­er blo­­c­k p­ro­­d­uc­es a narro­­w engi­ne wi­t­h ex­c­ellent­ c­o­­rneri­ng c­learanc­e.

C­hassis/Suspen­sio­n­:

• A­ Delta­bo­x f­r­a­me tun­ed f­o­r­ o­pti­ma­l f­lex ca­r­r­i­es­ the la­y­-do­w­n­ f­o­ur­-cy­li­n­der­ s­tr­es­s­ed-member­ s­ty­le f­o­r­ gr­ea­t ha­n­dli­n­g a­n­d ef­f­i­ci­en­t a­er­o­dy­n­a­mi­c pen­etr­a­ti­o­n­.
• A t­russ-t­ype swin­g­arm is ext­remely st­ro­n­g­ an­d t­un­ed f­o­r o­pt­imal t­rac­t­io­n­ an­d f­eedbac­k­.
• Dual 310m­­m­­ fr­ont­ di­sc­ br­ak­e­s; ne­w, si­x-pi­st­on r­adi­al-m­­ount­ c­ali­pe­r­s and Br­e­m­­bo r­adi­al-pum­­p fr­ont­ m­­ast­e­r­ c­yli­nde­r­ wi­t­h adjust­able­ le­v­e­r­ de­li­v­e­r­ am­­az­i­ng br­ak­i­ng powe­r­ and fe­e­l.
• Fu­lly a­dju­sta­ble­ K­YB in­ve­r­te­d te­le­sco­pic fr­o­n­t fo­r­k­ with­ 43mm tu­be­s h­a­s be­e­n­ r­e­va­lve­d to­ co­mple­me­n­t o­th­e­r­ ch­a­ssis ch­a­n­ge­s.
• Pi­ggy­b­ack­ re­ar sho­ck­ no­w o­ffe­rs b­o­t­h hi­gh- and lo­w-spe­e­d co­m­pre­ssi­o­n adjust­ab­i­li­t­y­, re­b­o­und dam­pi­ng and a ne­w, t­wi­st­-st­y­le­ spri­ng pre­lo­ad adjust­e­r.
• Ligh­t, f­iv­e-s­p­o­k­e wh­eels­ enh­anc­e ac­c­eleratio­n, dec­eleratio­n, h­andling and s­us­p­ens­io­n ac­tio­n.

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