LIGHTWEIGHT INTEGRATED REAR SUSPENSION AND DRIVE ENCLOSURE FOR A RIDDEN MOTORIZED VEHICLE RELATED APPLICATIONS [0001] The present application claims priority to and the benefit of U.S. Provisional Patent Application No. 6 1/582,8 14, filed on January 3, 20 12, which is incorporated herein by reference. BACKGROUND AND SUMMARY [0002] Presently disclosed is a rear suspension and drive enclosure for a ridden motorized vehicle. The presently disclosed rear suspension and drive enclosure may be used with my ridden motorized vehicle having a driven axle pivotally attached to the frame of the motorized vehicle, the driven axle operably connected to a motor power source. Swh ridden motorized vehicles may include motor scooters, motof-cycles, all-terrain-vehicles, tricycks, snowmobiles, and lawn &actors. [0003] Ridden motorized vehicles, such as those disclosed herein, gewdly comprise a frame, a power system, a d at least one drive wheel. The at least one wheel may provide traction with the ground dkedy, or may be part of a track system such as with a snow . TfPe power from the power sys&xn must be tcasfei-red to one of the wheels, usually tke , to prep1 to the vehicle. The power from the power system is usually tr~aferredto &e rwx wheel through a swingam, or drive enclosure, disposed between tke frame of the nw k d the rear wheel. A swkgmn is wx.4 to firnly hold the a l e , of the driven w k l , a d d &&wce latadiy from the fratae while d h i ~ ti~he gret ar axle to pivot q w d y g asd suspension to && bmps and vibratioas from the ground. Also the &we whether a chive shaft, chain, or beit is disposed along the swingam, grw- pwer to the rear *I. [@@4] Use of an t2nc10d drive chain or belt be4ween the notor known fm use with ridda vehlcks such as motorized scootess, , d - W - v & k i e s , a d s n o a s . In most cases &is includes a fixed mdti-piece chain mew bae that is IWMto th e rear siqxmoion, an eaclosure for dne rndw s ~ k . S x d t o ~ motor, and flexible enc10sw1.e &ions which connect the upper and hwes sectims of the two fured enclosures. This type of system is costly, heavy, and complex to manufacture and maintain. In scooters it is also common to have a drive system wherein the motor is attached to the rear suspension and drives the rear wheel via a gear drive, a drive shaft, or a mixture of gears and chains. Such designs described, for example, by Japanese Patent Application Publication JP 2010-228627 are complex, and the motion of the motor with the suspension increases unsprung weight to the detriment of ride quality. [OM51 Unsprung weight is the mass of every component on a ridden vehicle not supported by the suspension. Such components may include the wheels, brake systems, axel, and suspension system. In systems such as those described by JP 2010-228627 this also includes the motor and the gear system. A ridden vehicle having a lighter unsprung weight will have unsprung components moving more readily with the road bumps lurid irregularities, rnaiittakaing the traction between the road and and wheel, and therefore, provide a more uniform grip and improved performance. A ridden vehicle having a heavier unsprung weight will have wasprung components which will absorb less of the bumps and irregularities in the rod and, thedore, vibrations will be transmitted to the rest of the vehicle, the rider, and passengers. For the same reason road noise will increase with vehicles having a heavier unsprung we@t as well. Therefore, there is presently a need for a ridden m o t o d vehicle, such as a motor scooter, motorcycle, ATV, tricycle, snowmobile, or lawn tractor, having a lightweight rear s u s p s h ;and drive eaclowe system. 1-1 Further, systems of the piur art include motor scooters ;tnQ mokoreycbs hvhg a swiqam type rear swzq.xmsion system, pivotkg on an axis && nmw&ed to the frame behid the engine, such that the met sh& of the m~keis aot w i & t k e p i v o t ~ s f & d r 3 v e enclosure or swingam, a d i nclude a chah drive enchwe in the s w i ~Tf~ww. sy stems require at least two chains a d a dwbk i-&-ary qmcket on the swi pivot axis, providing a system which is c+ex and &&dt to we and sewice. Tke between ttae swiiqijarrm pivot piat and the rear wheel r& c a ~ a a t wh of the motor vehicle. A ridden +fe having a swkg&a or drive each- piv& pi& aot a vark& &st.ance frorn the wtpt &aft of tQPe Mer s d i y while the re= u p w d y a d downwdy about the swingarm pivot @t. A vaiaB1e & wheel axle and the motor assembly output shaft prevents a drive chain or belt having a fixed length to directly connect the rear wheel axle with the motor assembly output shaft. Some prior art systems have a sprocket on the output shaft of the motor assembly and a final sprocket mounted on the rear wheel concentric with the axle which allows for loosening and tightening of the chain during suspension movement, caused by the variation in distance between the engine and wheel sprockets as the suspension moves, and, in turn, causing noise, wear, and imprecise drive delivery. To overcome this problem other prior art systems have a double intermediary sprocket at the swingarm pivot point, and two chains or drive belts, one between the sprocket on the output shaft of the motor assembly and the double intermediary sprocket at the swingarm pivot point, and a second between the double intermediary sprocket at the swingarm pivot point and a sprocket on the rear wheel axle. Such prior art systems have may components comprised within the drive train of the motorized vehicles and are, therefore, complex to manufactwe, install, and maintain. [W7] There is presently a need for a drive system in ridckn vehicles which provides both rear suspension with an enclosed drive transfer system, such as a drive shaft, belt, or chain, while reducing the unsprung weight of the system. Also, there is presently a need for a lightweight rear suspension and drive enclosu~sy &m for a ridden motorid vehicle which has fewer parts, to reduce the cost and complexity of maaufactmhg, installation and ~ f l a k ~ n - of such systems. Presedy disclosed is a simple two pKce emckrswe wheizin tk drive traa&r system is t d y enclosed, has integrated chi& hsio~mer, has one drive transfer syskm, w h as a chive A&, chain, or belt beiween a ntotor assembly q u tM ta d ~ awrhe el axle, has lower u weight, d provides easy service access to tke drive trarz&r sy&em. between the frame and the sac wkd. Tke ridden vehicle having a frame, a mot01 a-My attached to the frame, autd the motor assembly having an outgut shaft. Such a motor assembly mity c-e any type of IgOfOT, for mgine. The output && of the metor a s d ym ay be to dimcay or ixldk3~4yta a&ix the power ficm tk Mve y to a &ired location at k t me drive wheel. h scwm embodiments, the motor a s h yrn w ampri-e a motor, as previousfy d i r ~ ~ udw with a p sysern or gear Box operably cQIlnectsd to the motor, the system change the speed of the output shaft from the motor assembly. The motor and gear system may be arranged as desired. In some embodiments, the gear system may be aligned with the output shaft of the motor, such that the motor and gear system, included as part of the motor assembly, are positioned side-by-side widthwise in the vehicle. In other embodiments, the motor and gear system included as part of the motor assembly may be positioned lengthwise in the vehicle, such that the gear system is next to, either behind or in front of, the motor, and operably connected to the motor, the gear system having an output shaft, being the output shaft of the motor assembly. [ O W ] The drive enclosure of the ridden vehicle has a fust end and a second end. The drive enclosure adapted to allow the rear wheel to pivot upwardly and downwardly rel&ive to the main chassis frame, with the first end pivotally attached to the frame, the aktachmmt poiat aligned with the output shaft of the motor assembly, and the woad end having a rear wheel attacked. The ridden vehicle may have a sprocket attached to the output shaft of the motor assembly at the fust end of the drive enclosu~a da sprocket attached to the rear w k la xle at the m o de nd of the drive enclosure, with a chain or belt disposed around and between the two sprockets providing drive from the motor assembly to the rear wheel. The ridden vehicle may have a shock absorber disposed between the drive enclosw an$ the main chassis frame providing shock resistance for the riddea vehicle, about the first end pivoting on the frame, while being ri- over uneven kda. [M43 In some ed-ts, the drive enclosure may comprise an inner drive e ~ l o s wsee ction and an outer drive mboure section fixed to the irt~~Gerk ive enclosure &on by h&mrs to provide a monocoqtfe ~~ chive enclmwe c d w&hst&ag the forces exerted by the wewt a d nzotjon of the vehicle as it is W n . The inmx drive eacisr:we section beiag inward dong the 1-d axis of the motw vehicle, i.e. $lerearwhd,k outer drive enclosure attack4 to the inner drive eilcloswe being outwd dong the l ~ ~ i R i + l axis of the riddm motor v W k dative to the in= drive eaclosure, i.e. on the side of tdae imer drive enclosure opposite the rear whtxl. S h a d g a u & n form a mmmxp &m&we. Tke mcmocoque s t p t r e of tx&diinents ctf the drive tmdoswe provides a five mc adapted to support the stmdma1 loads and torsim e x d by ttpe ridden vd&k operation, by wing the drive eracloaw's external skin, as o p p d to an i-d or truss. [0011] Such a monocoque structural drive enclosure provides a drive enclosure with fewer parts compared to prior art drive enclosures. The presently disclosed monocoque structural drive enclosure provides for reduced cost of manufacture, installation and maintenance, as well as reduced complexity of manufacture, installation and maintenance. The presently disclosed monocoque structural drive enclosure also provides for reduced unsprung weight of the ridden vehicle, thereby improving ride quality and reducing road noise. Also, the presently disclosed ridden vehicle, having a drive enclosure with a pivot point aligned with the motor assembly output shaft, provides a vehicle providing a single drive chain or belt between the sprocket on the motor assembly output shaft and the sprocket on the rear wheel axle while maintaining the distance between the motor assembly output shaft and the rear wheel axle, as opposed to a dual drive chain or belt system of the prior art.. Therefore, a ridden vehicle of the presently disclosed design provides for reduced complexity of manufacture, installation a d maintenance, as well as reduced cost for dl three phases. [0012] In some embodiments, the ridden vehicle may be a motor scooter having a motor assembly disposed on the main chassis frame, while also providing a flat board, step-through construction. This embodiment provides a motor scooter with reduced unsprung weight while also providing the *-through convenience of traditional motor scooters, which traditiondy have their motor assembly disposed on the rear wheel axle. This easily maiiataias the atbction of the motor scooter to both men and wornen aiike, while greatly reduchg w6png with the motor assembly attached to the f m e of the motor scooter instead of the rear wheel a&. The greatly redwed unsprung weight provides a motor scooter with an reduced road noise!. In some embodirn~st,h e ridaen vefnick may be MI scootex or a hybrid sc&r. (M13j In some ernbodimep~tst, he monocoque structural drive enclosure is disposed on me side of the motorized vehicle, such as a motor scooter, motorcyck, ATV, tricycle, snowmobik, or lawn tractor, providing for easy access and rnainaenaxx to the ~?ewuh eel, d b w q the raw wheel to be removed witkout disassembkg the drive enclwure. In other mWW, the presently disclosed rnonocoque ~~ drive enclosure may be w&-d on Boch sides d the vehicle, ha* a dual drive chain or bit, providing for inemad power to be tx between the motor assembly and the rear wheel. Furthemore, the mokw aseddy, a6 Qscusd above, may have an integrated or attached gear system disposed between the motor shaft and the output sprocket at the first end of the drive enclosure, the output shaft for the gear system aligned with the pivot point of the drive enclosure at the first end of the drive enclosure. [@I141 Also disclosed is a ridden vehicle comprising a frame, at least one motor assembly attached to the frame, and a motor assembly having an output shaft. The motor assembly may be attached to a motor assembly mount portion, removabk from the frame. Such a configuration provides for a more simple installation and manufacturing system for assembling the ridden vehicle. The ridden vehicle may also have a drive enclosure having a first end and a second end, the first end having a frame connection point aligned with the output shaft of the motor assembly, and the second end having a wheel connection point, the drive cmclmwe adapted to pivot about the frame connectim point. The ridden vehicle further comprises a wheel contatxed to the wheel connection point at the second end of t.4~d rive enclosure and a lidcage app~atus disposed between the output shaft of the motor assembly and the wheel co~mxkdad tEke word end of the drive enclosure, the linkage apparatus ackq%d to transfer power ftom the output shaft of the motor assembly to the drive wheel. The linkage apparatus between the o&pt shaft of the motor and the wheel may be a drive shaft, a chain, or a belt. [4%15] The drive enclosure of the presently disclosed ridden vehicle may comprise a f ~ spta rt and a second put, the first part positioned inwwdy of the vehicle, adjacent the m r wheel, the second part p o s i t i d o u t w d y and f a s t e d to the f i t pat. Such of the drive enclosure may provide a momccxpe drive e 9 ~ ~ b d w e . The motor a s d y c-xs a motor, or ahm&vely a motor a d at k s t me par. The motor may be an i&emd combu&on @ae or MI electric motor or a c The drive endosue may further comprise a tensimer mounted in the drive e~closure md adapted to exert a tension face to the lidage s. A ~?&cdc be disposed between the drive enclosule and the fr-, to provide Aock @H7] TfK pserltly dJwsed xi&n vehicle m yf wdm comprise at lead o ~feh t qwdet &tached to the output &aft of the motor assemMy, and at least one second s#m&d i&€aed to the rear wheel axle, the linkage apparatus disposed between the first sprocket and the second sprocket . [@I$] In some embodiments, the ridden vehicle may comprise the drive enclosure disposed between the frame and the rear wheel on a single side of a vehicle. In other embodiments, the ridden vehicle may further comprise at least two drive enclosures, each drive enclosure disposed on opposing sides of the vehicle, each drive enclosure having a first end and a second end, the first end of each drive enclosure having a frame connection point aligned with the output shaft of the motor assembly, and the second end of each drive enclosute having a wheel connection point, the at least two drive enclosures adapted to pivot about the fmae con~ectionp oint. In embodiments of the ridden vehicle having at least two drive encbsures, the frame connection point of each drive enclosure may be adapted to attach to the frame. Where each drive ewloswe is attached to the frame on opposite sides of the frame, or alternatively, each drive enclosure is attached to the frame on the same side. [@I91 Also disclosed is a drive enclosure for a ridden vehicle, comprising an inner drive enclosure disposed between a vehicle frame and a rear wheel of a vehicle, the inner drive enclosure having a fust end and a second end, the first end having a frame connection poi~ta,n d the second end having a wheel connection point, the inner drive enclosure deed to pivot about &e frame connection point with the output shaft of a v&kk motor assembly; d an outer drive ettcluswe f a s W to fate imer drive eacbsue. IP1 some eadmke& the ae4et drive encbsw comprises a first end and a d ed, tdre &st 4 h v k g a fi.iwiae c~~ pint, about the fr- condos pokt w&harkkb IRO&W Adc&M1y, or in the ive, taPe k r drive encbgure id ot&w &ve m o ndriv~e mc 1mwe. The scope and c ~ & o~f tt3s e pretm4y disclosed riddm vehicle, as Qgwsed above, may dm be auggnmtd by the Wbwhg dadptkn of the h w i q ~ s . The ^^ardjitfieMu^ if^aratas between Ae ^i^ut shaft of tfw motor ass^»Uy a ^ te wk@el is a ^ v e shiA. 6. T^ ridden vehicle as c l a i t i^ in c i i ^ 1, fyi^er coaipisi^ a tmtsmimi m^Hitod m te ^ v e enclosure and adi^ed to exmt a t@asioii fcwee to Ae Imki^ m^maHas. 7. '^eridden v^ideasckiaaedinclaim l,«^F^teira^ieftB>lh!^c^^isesa Bi^^vable motcH" assemUy mmM p@f^m. $. flK ridden vehicle as ciaiMedki^Hm l , t e A e r c @ ^ d s ^ « t tei^ two Mve ^iciosiues, each drive enclost^e di^^ssd @n of^osi^ ^ ^ s sf ^ mMim v«Meie, @a^ ^ v e ^iclosure having a first ^id and a second end, Ae first @md ^ @i^ drive ^k>^i»e having a frame connection point aligned with the outfwt shaft of the motor assembly, and the second end of each drive enclosure having a wheel connection point, the srt kast two drive enclosures adapted to pivot about die frame connection point. 9. The ridden vehicle as claimed in claim 1, further comprising shock absorber, the shock absorber disposed between the drive enclosure and tihe frame. 10. The ridden vehicle as claimed in claim 1, wherein the drive enclosure comprises a first part and a second part, the first part positioned inward of the ridden vehicle, adjacent the rear wheel, the second part positioned outwardly a ^ fastened to Ae first part, opposite the rear wheel. 11. The ridden vehicle as claimed in claim 1, where the ^ v e enclosure is a mtx^ococ^ chive enclosure. 12. The ridden vehicle as claimed in claim 1, wherein tf» ridden vrfifcle is a waoiix scooter. 13. The ridden vehicle as claimed in claim 1, wherein the ridden vehicle is an etecteic scooter. 14. The ridden vehicle as clainoed in claim 1, wherein ^ ridden v ^ k t e is a hj^cid scooter. 15. The nMesn \^mle as clain^d in clmm 1, fw^kec c^o^smg: at least one first sprodket ^toched to te CM^ut stmA 8iife k di^omd b^ween die fr^ne imd Ae rear wheel on a smgle skis (rf a liiAm^ veM^. 17. A (Mve &^ckmmc fm: a sMfen v^ttcde, @@nfti^g: an ij»ier drive ^kdo^ire stisposed betwe^i a rij^i^i v d ^ i e ^mme imd a i ^ r wteri ^ a ridden v^iiete, ^ ioa^ drive eaiclo^a^ Mvifflg a first e^ aad a seem^ @nd, Ibe 9sM. »id havi^ a frame connection point, and fte ^G<»id end hftvt^ a v^@^ ^mmaetimm p^M, 17 the inner drive enclosure juiapted to pivot about the frame conn^tion point alig^sd wift ^ output shaft of a ivMm vehicle motor assemWy; md an outer drive enclosure fastened to tiie inner drive ^iclosure. 18. The drive enclosure as claimed in claim 17, wherein the outer drive enclosuie coBE^ises a first end and a secoi»l ^id, fte first end having a firaii^ coooectton point, ^ ^ ttie s^(Mid end having a wheel connection point, die inner Aive ^tchnm^e ad^tod to ^ v ^ sbout the frame connection point alig^sd with a rM^^ vehicle aiotor msmiMy m^A dMt. 19. Ifee ^ v e enclosure as claimed in claim 17 whei^^ te innor Mve &^^&sm^ aad m^mc s^. 20. The drive enclosure as c i d i a ^ in claim 17, Mv^Fein ttie