Parts

List of YS engines Parts (Ordered by Part Number)

To order parts or service, please CALL us Monday – Friday between 9am – 5pm PST.

Part NumberPart DescriptionPrice (US Dollar)
YS010045FR LINER & PISTON SET$79.95
YS010545FR CRANKCASE$79.95
YS011045FS BACK PLATE GASKET$3.10
YS011545FS THROTTLE BODY$24.75
YS012045FS BACK PLATE$4.75
YS012545FS CRANKSHAFT$33.95
YS013045FS WRIST PIN$3.10
YS013545FS THROTTLE GASKET$3.10
YS014545FS GASKET SET$7.75
YS015045FS THROTTLE SET$69.50
YS015545FS CRANKCASE$79.95
YS016045FS THROTTLE BARREL$12.95
YS016545FS NEEDLE SOCKET$13.95
YS017045FS REGULATOR BODY$19.95
YS017545FS REGULATOR PLUNGER$3.10
YS0176120/140 REGULATOR PLUNGER..$3.10
YS0180120FS PLUNGER SPRING$1.50
YS018545FS CYLINDER HEAD SCREWS$3.10
YS019045FS NEEDLE VALVE SET$24.75
YS019545FS REGULATOR ADJUSTING SCREW$3.25
YS020045FS THROTTLE ARM/SCREW SET$5.50
YS020545FS BACK PLATE SCREWS$2.25
YS021045FS CYLINDER HEAD$18.75
YS021545FS CYLINDER HEAD GASKET$1.50
YS022045FS THROTTLE REG. MOUNT SCREWS$3.25
YS022545FS REAR BALL BEARING$16.95
YS023045FS LINER/PISTON$79.95
YS023545FS CON ROD$11.75
YS026560 REAR BEARING$21.95
YS037560FS THROTTLE ARM/SCREW SET$5.50
YS038060/45 THROTTLE BARREL RETAINER SCREW$2.50
YS038560/45 NEEDLE VALVE DETENT$3.10
YS039060/45 DRIVE WASHER SET$19.95
YS039560/45 THROTTLE STOP SCREW/SPRING SET$3.10
YS040060/45 PROP NUT$2.50
YS040560/45 CHECK VALVE$7.75
YS041060/45 DIAPHRAGM$3.10
YS041560/45 NEEDLE VALVE$7.75
YS042060/45 FUEL NIPPLE/WASHER SET$4.75
YS042560/45 PROP WASHER$2.50
YS043060/45 O RING SET$7.75
YS043560/45 WRIST PIN RETAINER$3.10
YS044060/45 FRONT BEARING$12.25
YS049060H PROP NUT$1.50
YS049545FS MUFFLER$26.95
YS0500120FS CRANKCASE$137.25
YS0505120FS VALVE COVER$14.75
YS0510120FS VALVE COVER GASKET$3.10
YS0515120FS VALVE COVER SCREW SET$1.50
YS0520120FS HEAD SHIM$2.50
YS0530120FS INTAKE VALVE$22.95
YS0535120FS EXHAUST VALVE$21.50
YS0540120FS VALVE SPRING SET$6.25
YS0545120FS SPRING RETAINER SET$6.25
YS0550120FS C RING SET$3.10
YS0555120FS ROCKER ARM SET$30.95
YS0560120FS TAPPET ADJUSTING SCREW$6.25
YS0565120FS TAPPET ADJUSTING LOCK NUT$3.10
YS0570120FS ROCKER ARM SHAFT$5.50
YS0575120FS ROCKER ARM SCREW$1.50
YS0580120FS E RING SET$2.50
YS0585120FS HEAD SCREWS$4.75
YS0591120FS CRANKSHAFT$90.25
YS0595120FS CYLINDER LINER$43.25
YS0600120FS PISTON$43.25
YS0605120FS WRIST PIN$8.50
YS0610120FS WRIST PIN RETAINER$3.10
YS0615120FS PISTON RING$18.50
YS0620120FS CONNECTING ROD$30.75
YS0623120FS BACK PLATE ASSEMBLY$83.75
YS0645120FS BACK PLATE GASKET$3.10
YS0650120FS BACK PLATE SCREWS$4.75
YS0655120FS CAM GEAR COVER$5.50
YS0660120FS CAM COVER O RING$1.50
YS0665120FS CAM COVER SCREW SET$1.50
YS0670120FS CAM GEAR$46.25
YS0675120FS CAM FOLLOWER$12.25
YS0680120FS PUSH ROD SET$13.95
YS0685120FS PUSH ROD COVER SET$7.75
YS0690120FS PUSH ROD COVER O RING$5.95
YS0695120FS FRONT BEARING$12.25
YS0700120FS REAR BEARING$17.75
YS0701120FS REAR BEARING-A$18.75
YS0705120FS CAM GEAR BEARING SET$12.95
YS0710120FS FUEL NIPPLE SET$9.25
YS0715120FS REGULATOR BODY$33.95
YS0725120FS REGULATOR O RING$1.50
YS0730120FS DIAPHRAGM$3.10
YS0745120FS REGULATOR GASKET$1.50
YS0750120FS REGULATOR SCREW SET$1.50
YS0755120FS CARBURETOR BODY$52.50
YS0760120FS THROTTLE BARREL$30.95
YS0775120FS NEEDLE SOCKET O RING$3.10
YS0785120FS THROTTLE STOP SCREW$1.50
YS0790120FS THROTTLE STOP SPRING$1.50
YS0810120FS CARBURETOR GASKET$3.10
YS0815120FS DRIVE WASHER$19.95
YS0820120FS SHAFT KEY$3.10
YS0825120FS PROPELLER WASHER$4.75
YS0830120FS PROPELLER NUT SET$7.75
YS0835120FS INTAKE PIPE$12.25
YS0840120FS INTAKE PIPE O RING$4.75
YS0845120FS EXHAUST PIPE$12.25
YS0850120FS EXHAUST PIPE LOCK NUT$6.20
YS0855120FS VALVE COVER ASSEMBLY$17.75
YS0860120FS ROCKER ARM ASSEMBLY$40.25
YS0865120FS CAM GEAR COVER ASSEMBLY$8.50
YS0870120FS CARBURETOR ASSEMBLY$146.50
YS0880120FS THROTTLE STOP ASSEMBLY$3.10
YS0885120FS DRIVE WASHER SET$22.95
YS0895120FS EXHAUST PIPE ASSEMBLY$18.75
YS0900120FS GASKET SET$10.75
YS0905120FS O RING SET$16.95
YS100061LS REAR EXHAUST CRANKCASE$150.75
YS100561LS CYLINDER HEAD$43.25
YS101061LS HEAD SHIM$2.95
YS101561LS HEAD SCREWS$3.10
YS102061LS REAR EXHAUST PISTON & LINER$147.00
YS102561LS WRIST PIN$6.25
YS103061LS WRIST PIN RETAINER$6.25
YS103561LS CON ROD$18.75
YS104061LS CRANKSHAFT$52.50
YS104561LS REAR BEARING$28.25
YS105061LS FRONT BEARING$13.95
YS105561LS KEY WAY$3.10
YS106061LS BACK PLATE$9.25
YS106161LS BACK PLATE-H$8.75
YS106561LS BACK PLATE GASKET$3.10
YS107061LS BACK PLATE SCREWS$3.10
YS107561LS THROTTLE BODY$38.50
YS108061LS THROTTLE BODY GASKET$3.10
YS108561LS THROTTLE BARREL$19.95
YS109061LS THROTTLE BARREL RETAINER$3.10
YS109561LS THROTTLE STOP SCREW$3.10
YS111061LS NEEDLE SOCKET O RING$3.10
YS111561LS NEEDLE DETENT$3.10
YS112061LS REGULATOR BODY$38.50
YS112561LS REGULATOR GASKET$3.10
YS113061LS DIAPHRAGM$3.10
YS113561LS REGULATOR ADJUSTING SCREW$4.75
YS114061LS REGULATOR SCREW$2.05
YS114561LS PLUNGER$3.10
YS115061LS REGULATOR SPRING$3.10
YS115561LS REGULATOR MOUNTING SCREW$4.75
YS116061LS SIDE EXHAUST CRANKCASE$150.75
YS116561LS SIDE PISTON & LINER$147.00
YS117561LS O RING SET$4.75
YS118061LS REGULATOR ASSEMBLY$59.95
YS118561LS CARBURETOR ASSEMBLY$102.75
YS119061LS GASKET SET$9.25
YS1195YS FUEL FILTER$4.75
YS120061LS PISTON LINER$77.25
YS120561LS PISTON REAR EXHAUST$43.25
YS121061LS PISTON RING$16.95
YS121561LS CRANKSHAFT$52.50
YS122061LS DRIVE WASHER SPACER$3.10
YS122561LS THROTTLE BODY$52.50
YS123061LS THROTTLE BARREL$19.95
YS123561LS SUB NEEDLE$9.25
YS124061LS SUB NEEDLE O RING$1.50
YS124561LS REGULATOR ADJUSTING SCREW$3.10
YS125061LS PISTON SIDE EXHAUST$43.25
YS126061LS O RING SET$6.25
YS126561LS PISTON & LINER REAR$131.25
YS127061LS PISTON & LINER SIDE$131.25
YS127561LS THROTTLE STOP SPRING$2.79
YS130061AR CRANKCASE$138.95
YS131061AR CYLINDER HEAD$50.95
YS132061AR PISTON & LINER$123.50
YS133061AR CRANKSHAFT$56.95
YS136061AR CRANKSHAFT RING$30.95
YS137061AR OIL PLUG$3.10
YS1400120AC CRANKCASE$144.95
YS1420120AC CRANKSHAFT$79.25
YS1430120AC PISTON$50.95
YS1440120AC BACK PLATE ASSEMBLY$87.95
YS1450120AC CARBURETOR BODY$55.50
YS1460120AC THROTTLE BARREL$20.95
YS1470120AC CRANKSHAFT RINGS$30.95
YS1480120AC AIR CHAMBER$134.25
YS1485120AC AIR CHAMBER GASKET$6.25
YS1490120AC AIR CHAMBER BRACKET$4.75
YS1500120AC BRACKET SCREW$4.75
YS1510120AC AIR CHAMBER NIPPLE$3.10
YS1520120AC CHECK VALVE BRACKET$6.25
YS1530120AC BRACKET SCREW$1.50
YS1540120AC WRIST PIN PLUG$4.75
YS1550120AC CARBURETOR ASSEMBLY$149.75
YS157091AC CRANKCASE$42.95
YS157191AC NEW CRANKCASE$43.95
YS158191AC NEW CYLINDER HEAD ASSEMBLY$115.50
YS159091AC INTAKE VALVE$15.75
YS160091AC EXHAUST VALVE$14.25
YS161091AC HEAD GASKET$2.95
YS161191AC NEW CYLINDER HEAD GASKET$3.95
YS162091AC CYLINDER LINER$37.25
YS162191AC NEW CYLINDER LINER$38.25
YS163091AC HEAD CREWS$4.25
YS164091AC VALVE COVER$11.50
YS165091AC VALVE COVER GASKET$2.95
YS166091AC VALVE COVER SCREWS$2.95
YS167091AC AIR CHAMBER$12.95
YS168091AC AIR CHAMBER GASKET$2.95
YS169091AC AIR CHAMBER SCREWS$4.25
YS170091AC AIR CHAMBER O RING$1.50
YS172091AC REAR BEARING$15.95
YS173091AC FRONT OIL SEAL$8.50
YS175091AC KEY WAY$2.95
YS176091AC PISTON$35.95
YS177091AC PISTON RING$14.25
YS178091AC WRIST PIN$7.25
YS179091AC ROCKER ARM SET$27.50
YS180091AC ROCKER ARM SHAFT$7.25
YS181091AC ROCKER ARM SCREW$1.50
YS182091AC CAM GEAR COVER$5.75
YS183091AC CAM COVER O RING$1.50
YS184091AC CAM COVER SCREWS$2.95
YS185091AC PUSH RODS$5.50
YS186091AC PUSH ROD COVERS$7.25
YS187091AC CON ROD$20.25
YS188091AC BACK PLATE$34.50
YS189091AC DISK VALVE$18.95
YS190091AC DISK VALVE PIN$5.75
YS191091AC DISK VALVE PIN RETAINER$2.95
YS192091AC DISK VALVE PIN E RING$1.50
YS193091AC BACK PLATE GASKET$2.95
YS194091AC BACK PLATE SCREWS$4.25
YS195091AC CARBURETOR BODY$40.25
YS196091AC THROTTLE BARREL$22.95
YS197091AC CARBURETOR GASKET$2.95
YS199091AC REGULATOR BODY$34.50
YS200091AC DIAPHRAGM$2.95
YS202091AC GASKET SET$12.95
YS203091AC SPRING RETAINER SET$5.75
YS204091AC VALVE SPRING RETAINER CLIP$5.75
YS205091AC LOW SPEED NEEDLE$8.50
YS206091AC LOW SPEED NEEDLE O RING$1.50
YS207091AC THROTTLE BARREL SEAL$2.95
YS208091AC CARBURETOR SCREWS$2.95
YS209091AC O RING SET$12.95
YS210091AC BACK PLATE ASSEMBLY$65.95
YS211091AC CARBURETOR ASSEMBLY$103.25
YS212091AC REGULATOR ASSEMBLY$51.95
YS212591ACH CRANKSHAFT$54.95
YS213091ACH THROTTLE BARREL$24.75
YS213591ACH REGULATOR SCREW$4.25
YS214091ACH REGULATOR PLATE$18.95
YS214591ACH CARBURETOR ASSEMBLY$97.95
YS215091ACH GASKET SET$14.95
YS2152120SC CRANKCASE$128.50
YS2155120SC CYLINDER HEAD$79.25
YS2160120SC INTAKE VALVE$21.50
YS2165120SC EXHAUST VALVE$26.00
YS2170120SC VALVE SPRING SET$7.25
YS2175120SC SPRING RETAINER SET$7.25
YS2180120SC VALVE SPRING CLIP$7.25
YS2185120SC CRANKSHAFT$73.75
YS2190120SC CRANKSHAFT RING$25.95
YS2195120SC PISTON$43.25
YS2200120SC CON ROD$25.95
YS2225120SC RETAINER SCREW$3.00
YS2230120SC CAM GEAR COVER$5.10
YS2235120SC CAM COVER SCREWS$4.25
YS2240120SC FRONT OIL SEAL$8.75
YS2245120SC CARBURETOR BODY$36.00
YS2250120SC THROTTLE BARREL$25.95
YS2255120SC THROTTLE BARREL SEAL$4.25
YS2260120SC CARBURETOR GASKET$3.00
YS2265120SC DRIVE WASHER$17.25
YS2270120SC PROPELLER WASHER$2.25
YS2275120SC REGULATOR BALLAST$4.25
YS2280120SC GASKET SET$10.00
YS2285120SC O RING SET$17.25
YS2290120SC CARBURETOR ASSEMBLY$116.95
YS2295120SC BACK PLATE ASSEMBLY$73.50
YS2300120SC CYLINDER HEAD ASSEMBLY$129.95
YS2305120NC CYLINDER HEAD$67.95
YS2310120NC CRANKSHAFT$69.95
YS2315120NC CARBURETOR BODY$35.95
YS2320120NC THROTTLE BARREL$26.95
YS2340120NC CYLINDER HEAD ASSEMBLY$116.95
YS2345120NC CARBURETOR ASSEMBLY$93.95
YS2351120FZ CRANKCASE$128.00
YS235561ST CRANKCASE$108.95
YS236061ST CYLINDER HEAD$39.95
YS236561ST PISTON & LINER SET$113.50
YS237061ST CYLINDER LINER$66.50
YS237561ST PISTON$35.95
YS238061ST PISTON RING$15.50
YS238561ST WRIST PIN$5.75
YS239061ST CON ROD$16.95
YS239561ST CRANKSHAFT$48.75
YS240061ST BACK PLATE$8.75
YS240561ST CARBURETOR ASSEMBLY$117.50
YS241061ST CARBURETOR BODY$48.75
YS241561ST THROTTLE BARREL$18.75
YS242061ST HEAD SHIM$2.95
YS243061ST REAR BEARING$17.25
YS243561ST CARBURETOR SCREWS$2.95
YS244061ST CARBURETOR SUB PLATE$18.75
YS244561ST REGULATOR SUB PLATE$8.95
YS245061ST REGULATOR ASSEMBLY$51.50
YS245561ST-H REGULATOR SUB PLATE$18.75
YS246061ST DIAPHRAGM$5.75
YS248061ST REGULATOR GASKET$2.95
YS251061ST CHECK VALVE$10.50
YS251561ST GASKET SET$7.25
YS252061ST O RING SET$5.75
YS2600140FZ CRANKCASE$142.95
YS2605140FZ HEAD SHIM$3.50
YS2610140FZ CYLINDER HEAD$80.25
YS2615140FZ HEAD BOLTS$4.95
YS2620140FZ CRANKSHAFT$72.25
YS2625140FZ CYLINDER LINER$46.50
YS2630140FZ PISTON$78.50
YS2635140FZ WRIST PIN RETAINER SET$8.25
YS2640140FZ PISTON RING$19.50
YS2645140FZ CON ROD$32.00
YS2650140FZ BACK PLATE$81.95
YS2655140FZ BACK PLATE SCREWS$4.95
YS2660140FZ CAM GEAR$48.25
YS2665140FZ PUSH ROD SET$14.50
YS2670140FZ PUSH ROD COVERS$11.25
YS2675140FZ FUEL NIPPLES$8.25
YS2680140FZ CARBURETOR BODY$40.25
YS2685140FZ THROTTLE BARREL$32.00
YS2690140FZ NEEDLE VALVE$12.95
YS2695140FZ NEEDLE O RING$3.50
YS2700140FZ NEEDLE SEAT$9.95
YS2705140FZ NEEDLE SEAT O RING$3.50
YS2710140FZ NEEDLE DETENT$4.95
YS2715140FZ DRIVE WASHER$17.75
YS2720140FZ DRIVE WASHER RETAINER$4.95
YS2723140FZ INTAKE PIPE$14.50
YS2725140FZ GASKET SET$11.25
YS2730140FZ O RING SET$19.50
YS2735140FZ CARBURETOR ASSEMBLY$126.95
YS2740140FZ NEEDLE VALVE ASSEMBLY$28.95
YS2745140FZ BACK PLATE ASSEMBLY$81.95
YS2750140FZ HEAD ASSEMBLY$136.50
YS280053FZ CRANKCASE$40.95
YS280553FZ CYLINDER HEAD ASSEMBLY$70.95
YS281053FZ INTAKE VALVE$16.25
YS281553FZ EXHAUST VALVE$14.50
YS282053FZ VALVE SPRING SET$5.75
YS282553FZ VALVE SPRING RETAINER SET$5.75
YS283053FZ HEAD SEAL$4.50
YS284053FZ HEAD BOLT SET$4.50
YS284553FZ VALVE COVER$10.25
YS285053FZ VALVE GASKET$3.50
YS285553FZ VALVE SCREWS$3.50
YS286053FZ INTAKE PIPE$12.25
YS286553FZ INTAKE PIPE O RING$3.50
YS287553FZ REAR BEARING$13.25
YS288053FZ FRONT BEARING$11.95
YS288553FZ FRONT SEAL$8.75
YS289053FZ DRIVE WASHER$13.25
YS289553FZ DRIVE WASHER RETAINER$4.50
YS290053FZ PROP WASHER$3.50
YS290553FZ PROP NUT SET$4.50
YS291053FZ PISTON$30.50
YS291553FZ PISTON RING$14.50
YS292053FZ WRIST PIN$7.50
YS292553FZ WRIST PIN RETAINER$5.75
YS293053FZ ROCKER ARM SET$24.95
YS293553FZ ROCKER ARM SHAFT$5.75
YS294053FZ SHAFT SCREW$3.50
YS294553FZ CAM GEAR$41.95
YS295053FZ CAM COVER$5.75
YS295553FZ COVER O RING$1.50
YS296053FZ CAM BEARING SET$16.25
YS296553FZ CAM FOLLOWER SET$11.75
YS297053FZ PUSH ROD SET$5.75
YS297553FZ PUSH ROD COVER SET$7.50
YS298053FZ PUSH ROD COVER O RING$4.50
YS298553FZ CON ROD$17.50
YS299053FZ BACK PLATE$29.95
YS299553FZ DISC VALVE$15.25
YS300053FZ DISC VALVE PIN$5.75
YS300553FZ BACK PLATE GASKET$3.50
YS301053FZ BACK PLATE SCREWS$3.50
YS301553FZ CARBURETOR BODY$30.75
YS302053FZ THROTTLE BARREL$20.50
YS302553FZ THROTTLE BARREL SEAL$5.75
YS303053FZ NEEDLE VALVE$13.25
YS303553FZ FUEL NIPPLE$2.50
YS304053FZ CARBURETOR GASKET$3.50
YS304553FZ CARBURETOR SCREWS$4.50
YS305053FZ REGULATOR BODY$29.25
YS305553FZ DIAPHRAGM$4.50
YS305753FZ REGULATOR SPRING$4.50
YS306053FZ REGULATOR SCREWS$3.50
YS306553FZ MUFFLER$20.95
YS307053FZ HEADER PIPE$5.95
YS307553FZ HEADER LOCK NUT$4.50
YS308053FZ GASKET SET$7.50
YS308553FZ O RING SET$13.25
YS309053FZ NEEDLE VALVE ASSEMBLY$27.95
YS309553FZ MUFFLER ASSEMBLY$26.50
YS400053FZ BACK PLATE ASSEMBLY$47.95
YS400553FZ CYLINDER HEAD ASSEMBLY$104.95
YS4010ST2 LOW SPEED NEEDLE$7.50
YS4015ST2 LOW SPEED O RING$2.50
YS4105ST2 CRANKCASE$110.95
YS4110ST2 CYLINDER LINER$65.95
YS4115ST2 PISTON$35.95
YS4120ST2 CON ROD$20.95
YS4125ST2 CRANKSHAFT$49.95
YS4130ST2 CARBURETOR BODY$49.95
YS4135ST2 THROTTLE BARREL$21.95
YS4140ST2 HIGH SPEED NEEDLE$10.50
YS4145ST2 LOW SPEED NEEDLE$11.95
YS4150ST2 LOW SPEED NEEDLE O RING$3.25
YS4155ST2 REGULATOR ASSEMBLY$55.95
YS4160ST2 O RING SET$6.50
YS4165ST2 PISTON/RING/LINER SET$119.95
YS4170ST2 CARBURETOR ASSEMBLY$117.50
YS4200140L CRANKCASE$119.95
YS4205140L CRANKSHAFT$69.95
YS4210140L CARBURETOR BODY$44.95
YS4215140L THROTTLE BARREL$31.95
YS4220140L CARBURETOR ASSEMBLY$129.95
YS430591FZ CARBURETOR BODY$56.25
YS431091FZ THROTTLE BARREL$32.95
YS431591FZ BARREL SEAL$4.95
YS432091FZ CRANKSHAFT$61.25
YS432591FZ DRIVE WASHER$18.75
YS433091FZ DRIVE WASHER RETAINER$5.95
YS433591FZ MUFFLER ASSEMBLY$44.95
YS434091FZ MUFFLER$36.25
YS434591FZ EXHAUST HEADER$12.95
YS435091FZ EXHAUST LOCK NUT$8.25
YS435591FZ O RING SET$16.25
YS436091FZ CARBURETOR ASSEMBLY$109.95
YS436563 CRANKCASE$48.50
YS437063 CYLINDER HEAD ASSEMBLY$119.50
YS437563 CYLINDER HEAD W/ LINER$80.50
YS438063 CRANKSHAFT$59.50
YS438563 PISTON$38.50
YS439063 PISTON RING$19.50
YS439563 WRIST PIN$8.50
YS440063 CAM GEAR COVER SCREW SET$3.50
YS442080 CRANKCASE$124.50
YS442580 CYLINDER HEAD$46.50
YS443080 HEAD GASKET$3.10
YS443580 PISTON & LINER$121.50
YS444080 CYLINDER LINER$69.50
YS444580 PISTON$38.50
YS445080 PISTON RING$19.50
YS445580 CONNECTING ROD$18.75
YS446080 CRANKSHAFT$60.50
YS446580 CARBURETOR ASSEMBLY$129.50
YS447080 CARBURETOR BODY$53.50
YS447580 THROTTLE BARREL$22.50
YS448080 NEEDLE VALVE ASSEMBLY$28.95
YS448580 NEEDLE VALVE$12.95
YS4490140DZ CRANKCASE$152.95
YS4495140DZ VALVE COVER$17.95
YS4500140DZ HEAD ASSEMBLY$139.95
YS4505140DZ CYLINDER HEAD$84.95
YS4510140DZ INTAKE TAPPET ADJUSTING SCREW$3.10
YS4515140DZ EXHAUST TAPPET ADJUSTING SCREW$4.95
YS4520140DZ CRANKSHAFT$79.95
YS4525140DZ PISTON$78.50
YS4530140DZ CONNECTING ROD$34.95
YS4535140DZ BACK PLATE ASSEMBLY$81.95
YS4540140DZ BACK PLATE$49.95
YS4545140DZ DISC VALVE$21.95
YS4550140DZ INSULATOR$24.95
YS4560140DZ BACK PLATE SCREW$5.95
YS4565140DZ CAM GEAR$48.95
YS4570140DZ INTAKE CAM FOLLOWER$7.95
YS4575140DZ EXHAUST CAM FOLLOWER$7.95
YS4580140DZ EXHAUST PUSH ROD$7.95
YS4585140DZ PUSH ROD COVER$7.95
YS4595140DZ FUEL PUMP ASSEMBLY$129.95
YS4600140DZ REGULATOR BODY$32.95
YS4605140DZ DIAPHRAGM$5.75
YS4610140DZ REGULATOR SPRING$3.10
YS4615140DZ REGULATOR SCREW SET$3.10
YS4620140DZ FUEL PUMP BODY$32.95
YS4625140DZ PUMP VALVE$4.95
YS4630140DZ PUMP VALVE SPRING$3.10
YS4635140DZ FUEL PUMP PLATE$32.95
YS4640140DZ FUEL PUMP SCREWS$3.10
YS4645140DZ FUEL PUMP GASKET$3.10
YS4650140DZ FUEL PUMP PLUNGER$7.95
YS4655140DZ FUEL PUMP INSULATOR$5.75
YS4660140DZ INSULATOR O RING$3.10
YS4665140DZ FUEL PUMP STAY SET$5.75
YS4705140DZ INSULATOR GASKET$3.10
YS4710140DZ GASKET SET$12.95
YS4715140DZ O RING SET$20.95
YS4720140DZ FUEL TANK CLUNK$12.95
YS4725140DZ DISC VALVE PIN$9.95
YS4730140DZ CAM FOLLOWER$14.95
YS4735140DZ UPPER PUSH ROD$5.95
YS4740140DZ LOWER PUSH ROD$5.95
YS4745140DZ CARBURETOR ASSEMBLY$139.95
YS4750140DZ CARBURETOR BODY$81.95
YS4755140DZ THROTTLE BARREL SEAL$5.95
YS4760140DZ CARBURETOR GASKET$3.10
YS4765140DZ RESTRICTOR SET$9.95
YS477091H CRANKCASE$124.50
YS477591H CYLINDER HEAD$51.50
YS478091H HEAD GASKET$3.10
YS478591H HEAD SCREWS$3.10
YS479091H CYLINDER LINER$72.50
YS479591H PISTON$42.50
YS480091H PISTON RING$22.50
YS480591H CONNECTING ROD$22.50
YS481091H CRANKSHAFT$63.50
YS481591H BACK PLATE$9.50
YS482091H BACK PLATE GASKET$3.10
YS482591H CARBURETOR BODY$53.50
YS483091H CARBURETOR GASKET$3.10
YS483591H THROTTLE BARREL$23.50
YS484091H SEAL RING$3.95
YS484591H LOW SPEED NEEDLE$12.95
YS485091H CARBURETOR SUBPLATE....$18.75
YS485591H GASKET SET$8.25
YS486091H PISTON & LINER$129.95
YS486591H CARBURETOR ASSEMBLY$129.95
YS4870110 CRANKCASE$56.95
YS4875110 CYLINDER HEAD ASSEMBLY$124.95
YS4880110 CYLINDER HEAD WITH LINER$104.95
YS4890140SPT CRANKCASE$142.95
YS4900140SPT CRANKSHAFT$72.25
YS4905140SPT BACK PLATE ASSEMBLY$81.95
YS4910140SPT BACK PLATE$49.95
YS4915140SPT CARBURETOR ASSEMBLY$126.95
YS4920140SPT CARBURETOR BODY$40.25
YS4925140SPT MUFFLER SET$44.95
YS4930FZ140S MUFFLER$36.25
YS4GP4 CYCLE GLOW PLUG$10.00
YS500063S CRANKCASE$48.95
YS500563S CYLINDER HEAD ASSEMBLY$121.95
YS501063S CYLINDER HEAD$82.95
YS501563S CYLINDER GASKET$5.95
YS502063S PISTON$42.95
YS502563S REGULATOR ADJ SCREW$5.95
YS503063S REGULATOR ADJ SCREW O-RING$3.95
YS503563S PLUNGER SPRING$5.95
YS504063S PLUNGER$4.95
YS504563S REGULATOR BODY A$19.95
YS505063S DIAPHRAGM$3.95
YS505563S REGULATOR BODY B$17.95
YS506063S REGULATOR BRACKET SET$6.95
YS506563S BOTTOM COVER SET$4.95
YS507063S BOTTOM COVER GASKET$3.95
YS507563S REGULATOR ASSEMBLY$54.95
YS508063S GASKET SET$12.95
YS508563S O RING SET$16.95
YS5095160DZ CRANKCASE$154.95
YS5100160DZ HEAD GASKET$3.10
YS5105160DZ CRANKSHAFT$91.95
YS5110160DZ CYLINDER LINER$54.95
YS5115160DZ PISTON$78.50
YS5120160DZ WRIST PIN$8.75
YS5125160DZ PISTON RING$22.95
YS5130160DZ CHECK VALVE$24.95
YS5135160DZ TUBE HOLDER$8.75
YS5140160DZ BACKPLATE ASEMBLY$81.95
YS5165160 DZ CONNECTING ROD$36.95
YS518050ST CRANKCASE$84.95
YS518550ST CYLINDER HEAD$19.95
YS519050ST HEAD GASKET$3.50
YS519550ST HEAD SCREWS$3.95
YS520050ST PISTON AND LINER SET$94.95
YS520550ST LINER$49.95
YS521050ST PISTON$34.95
YS521550ST PISTON RING$16.95
YS522050ST WRIST PIN$6.95
YS522550ST WRIST PIN RETAINERS$3.95
YS523050ST CONNECTING ROD$17.95
YS523550ST CRANKSHAFT$52.95
YS524050ST REAR BEARING$18.95
YS524350ST SPACER$3.10
YS524550ST PROP NUT$2.50
YS525050ST BACKPLATE$8.95
YS525550ST BACKPLATE O-RING$5.95
YS526050ST BACKPLATE SCREWS$3.95
YS527050ST CARBURETOR BODY$29.95
YS527550ST CARBURETOR GASKET$2.95
YS528050ST CARBURETOR ORING$2.95
YS528550ST CARBURETOR INSULATOR$15.95
YS529050ST INSULATOR SCREWS$3.50
YS529550ST INSULATOR GASKET$3.50
YS530050ST THROTTLE BARREL$16.95
YS530550ST NEEDLE VALVE SET$28.95
YS531050ST NEEDLE VALVE$13.95
YS531550ST NEEDLE SOCKET$10.95
YS532050ST NEEDLE SOCKET O-RING$3.50
YS532550ST CARBURETOR SCREWS$3.50
YS533250ST REGULATOR BODY "A"$24.95
YS533550ST REGULATOR BODY "B"$32.95
YS534050ST DIAPHRAGM$3.50
YS534350ST PLUNGER$3.95
YS534550ST REGULATOR O-RING$3.50
YS535050ST REGULATOR SCREWS$7.95
YS535550ST REGULATOR SCREW O-RING$3.50
YS536050ST REGULATOR SCREW SET$3.50
YS536550ST PLUG SCREW$1.95
YS537050ST GASKET SET$7.95
YS537550ST O-RING SET$23.00
YS539550ST PLUNGER$4.95
YS5400110S CRANKCASE$66.95
YS5405110S HEAD ASSEMBLY$128.95
YS5415110S CYLINDER GASKET$4.95
YS5420110S HEAD SCREWS$4.95
YS5425110S CRANKSHAFT$66.95
YS5430110S CRANKSHAFT RING$22.95
YS5435110S REAR BEARING$18.95
YS5440110S CONNECTING ROD$21.95
YS5445110S BACKPLATE ASSEBMLY$69.95
YS5470110S CARBURETOR ASSEMBLY$124.95
YS5475110S THROTTLE BARREL$32.95
YS5480110S FUEL NIPPLE$3.50
YS5485110S CARBURETOR SCREWS$8.95
YS5790110S REGULATOR ASSEBMLY$56.95
YS5795110S REGULATOR BODY "B"$19.95
YS5800110S LOWER STAY$7.95
YS5805110S UPPER STAY$8.95
YS5815110S GASKET SET$12.95
YS582091SR CRANKCASE$126.95
YS582591SR CYLINDER HEAD$52.95
YS583091SR HEAD SHIM$3.50
YS583591SR PISTON AND LINER SET$129.95
YS584091SR CYLINDER LINER$74.95
YS584591SR PISTON$44.95
YS585091SR PISTON RING$23.95
YS585591SR CRANKSHAFT$64.95
YS586091SR REAR BEARING$22.95
YS586591SR BACKPLATE$9.95
YS587091SR BACKPLATE O-RING$3.50
YS587591SR CARBURETOR ASSEMBLY$129.95
YS588091SR CARBURETOR BODY$53.50
YS588591SR THROTTLE BARREL$23.50
YS589091SR GASKET SET$9.95
YS589591SR O-RING SET$9.95
YS5900170DZ CRANKCASE$154.95
YS5905170DZ HEAD GASKET$3.95
YS5910170DZ HEAD ASSEMBLY$144.95
YS5915170DS INTAKE VALVE SPRING$7.25
YS5920170DZ EXHAUST VALVE SPRING$6.50
YS5925170DZ CRANKSHAFT$94.95
YS5930170DZ LINER$59.95
YS5935170DZ PISTON$78.50
YS5940170DZ WRIST PIN$12.95
YS5945170DZ CONNECTING ROD$39.95
YS5950170DZ PUMP ASSEMBLY$134.95
YS5965170DZ WRIST PIN ACCESS PLUG$5.95
YS5970170DZ TUBE HOLDER$8.75
YS5980170DZ BACKPLATE ASSEMBLY$84.95
YS5985170DZ CAM FOLLOWER$15.95
YS5990170DZ PUMP VALVE SPRING$3.20
YS6000170DZ INTAKE PIPE$14.50
YS6050170DZ CDI CYLINDER HEAD ASSEMBLY$159.95
YS6070170DZ CDI BACKPLATE ASSEMBLY$110.95
YS6075170DZ CDI CARBURETOR INSULATOR$26.95
YS6080170DZ CDI INSULATOR GASKET$3.95
YS6110170DZ CDI INGNITION BOX$149.95
YS6120170DZ CDI CONVERSION KIT$400.00
YS6130170DZ CDI PLUG$23.95
YS615056SR CRANKCASE$95.95
YS615556SR CYLINDER HEAD$42.95
YS616056SR HEAD GASKET$3.95
YS616556SR LINER AND PISTON SET$99.95
YS617056SR LINER$54.95
YS617556SR PISTON$39.95
YS618056SR PISTON RING$19.95
YS618556SR CRANKSHAFT$56.95
YS619056SR BACKPLATE$9.95
YS619556SR CARBURETOR BODY$32.95
YS620056SR CARURETOR O-RING$4.95
YS620556SR INSULATOR SET SCREWS$3.95
YS621056SR THROTTLE BARREL$18.95
YS621556SR THROTTLE BARREL SET SCREW$3.95
YS622056SR HIGH NEEDLE$13.95
YS622556SR HIGH NEEDLE O-RING$3.95
YS623056SR HIGH NEEDLE SOCKET$10.95
YS623556SR HIGH NEEDLE SOCKET O-RING$3.95
YS624056SR CARBURETOR SCREWS$3.95
YS624556SR REGULATOR BODY "A"$24.95
YS625056SR REGULATOR BODY "B"$37.95
YS625556SR O-RING SET$24.95
YS0002YS SUPER MOUNT$225.00
YS5385YS MOUNT SPACER "A"$30.00
YS5390YS MOUNT SPACER "B"$19.50

To order parts or service, please CALL us Monday – Friday between 9am – 5pm PST.