SOME OF WHAT I HAVE FOUND OUT ABOUT THE LIFAN 140CC ENGINES... THEY HAVE A BORE OF 55MM AND I THINK A STROKE OF 59MM (SOME SAY 59.5MM??) THEY HAVE A 28 TOOTH CAM SPROCKET THEY HAVE A 81.5MM TALL CYLINDER HAS THE 17MM OD COUNTERSHAFT @ COMPLETE LIFAN_HEAD_WITH 23MM_&_27MM_VALVES (HAS_EMISSIONS_HOLE) 12210/1P54FMI/1P56FMJ 1/22P (S1188/356V) @ LIFAN 140CC_CYLINDER STOCK_55MM_BORE 12112/1P55FMJ 1/20P (S1198) @ LIFAN 140CC PISTON KIT 55MM BORE 15mm PIN 13211/1P55FMJ (S1164) @ LIFAN 140CC 55MM BORE HEAD GASKET (SOLD_EACH) (291H) @ 120CC_TO_150CC W/23&27/VALVES CYLINDER BASE_GASKET (SOLD_EACH) (291B) @ LIFAN TRUE_140CC ENGINE "COMPLETE" GASKET/SEAL_SET (140/COM/GAS) (S1380) @ LIFAN 140cc/150cc REAR CLUTCH ASSY 22100/1P56FMJ (S1178) @ BCI'S LIFAN_REV_CAM LIFAN_140/150'S set (200148/S1129) @ LIFAN_140 56.00mm bore COPPER_HEAD GASKET_.016"_THICK LF120-56X.016" @ LIFAN 140CC LEFT CRANKCASE HALF (i_would_get_both_halves!!) @ LIFAN 140cc TRANSMISSION CASE SET (RH/CCH/1P55FMJ & LH/CCH/1P55FMJ) @ LIFAN 140CC RIGHT CRANKCASE HALF (i_would_get_both_halves!!) @ *GUIDE_PIN (8MM_X_14MM) 8MM_OD 7.2MM_ID WORKS_ON_7MM STUD_BOLTS HEAD_TO_CYL TRX90_LIFAN_120 LIFAN_138 90701-GF6-000 1/22M (209J) @ LIFAN 140CC CLUTCH COVER 11310/1P55FMJ (S1185) @ FLYWHEEL PULLER_CLICK TO_SEE APPLICATIONS most_50's_70's 75'S_80'S TRX90'S_ATC'S (8204) @ TEMPERATURE DIPSTICK ALL TRX90'S 1/22M (95Z) @ LIFAN_140 CAM_CHAIN 88_links DID_BRAND MADE_IN_JAPAN !! (157C) @ LIFAN_7MM CYLINDER HEAD_NUT (305N) @ COPPER CYLINDER_HEAD THICK_WASHER 7MM_LIFAN 120/125/138/140 (305Q) @ LIFAN CYLINDER_HEAD THICK_WASHER 7MM_LIFAN 120/125/138/140 (305P) @ Z50R_1988_TO_99 XR/CRF50_AND_70'S TRX90'S valve_guide_seals LIFAN_50_TO_140 (203B) @ ROUND LEFT SIDE HEAD COVER FITS_ALL_CLONE'S WITH_THE_LARGER LEFT_COVER (LF120/33) temp out of stock @ *COVER_LH ROUND_LARGE fits_all_China engines_that_have larger_left_cover(221N) @ LEFT_SIDE ROUND_HEAD_COVER BOLT (SOLD_EACH) (297Z) @ LF120 ROUND_LEFT_HEAD COVER_GASKET (LF120/31) @ _ (LIFAN_CLONE_ENGINE'S) STATOR_PLATE_ASSY CDI_TYPE_IGN. KICK_ONLY_MODELS (LF/STATOR/PLATE) @ LIFAN 120_138 140_&_150CC DIAGRAMS @ 27MM 120cc/138/140/150 LIFAN_INTAKE_VALVE (291K_IN_ONLY) @ 23MM_LIFAN 120/138/140/150 EXHAUST_VALVE (291K_EX_ONLY) @ DOWEL_PIN 10_X_14MM SOLD_EACH 1/22P (285Y) @ OIL_PUMP_DRIVE GEAR_18_TOOTH 120CC_TO_150CC (LF15211) @ CLUTCH CABLE BRACKET LIFAN 120/138/140CC WITH TOP CLUTCH LEVER (291M) @ LIFAN_OIL_PUMP 120CC_138CC 140CC_150CC 22_TOOTH_GEAR (305S) @ WASHER, SPLINED CLUTCH (303S) @ WASHER, CLUTCH (303R) @ *TRANSMISSION WASHER (303T) @ BOLT, 6x14 (303Y) @ LF120_LIFAN VALVE_COVER_CAP TWO_BOLT_TYPE (LF120/25) (12243/1P52FMI) (S1262) @ BOLT 6MM_x_12MM (HEAD_8MM_HEX) (303Q) @ .EMISSIONS/EXHAUST PORT ON HEAD BLOCK OFF 1/22P (356V)