1978 Diagrams

1978 · Engine Parts List

Engine

MC 250 · MC 400 · MC 440 · GS 250 · GS 400 · GS 440 · 288 parts

MC 250MC 400MC 440GS 250GS 400GS 440
1978 Maico Engine parts diagram
Click to enlarge
Item No.Part No.DescriptionMC 250MC 400MC 440GS 250GS 400GS 440
11998Crankcase right hand11-11-
11982Crankcase right hand--1--1
21997Internal ring222222
31996Crankcase left hand11-11-
31979Crankcase left hand--1--1
41995Engine mounting bushes666666
51994Spacer bush for swing arm222222
61993Crankcase gasket111111
71992Crankcase cover111111
81991Ignition cover111111
91990Crankcase cover gasket left hand111111
101989Crankcase cover gasket right hand111111
111988Main bearing cover plate111111
121795Counter sunk screw M 5x8 Din 965111111111111
131987Crankshaft housing2--2--
141986MS bearing cover plate222222
151787Stud screw M 8x28 Din 940444444
161831Tension pin 8x10 Din 7346222222
17400Oil drain plug111111
181985Breather111111
191984Oil filling plug111111
20410Spacer ring122122
211526Cylinder head screw M 8x10 Din 84111111
221536Cylinder head screw M 6x25 Din 84444444
231550Cylinder head screw M 6x30 Din 84333333
241538Cylinder head screw M 6x35 Din 84555555
251539Cylinder head screw M 6x40 Din 84666666
261541Cylinder head screw M 6x50 Din 84222222
271542Cylinder head screw M 6x55 Din 84222222
281983Counter sprocket cover111111
291533Cylinder head screw M 6x18 Din 84333333
301865Sealing ring AS 12x22x7 Din 3760111111
311866Sealing ring A 18x28x7111111
321313Spring rubberX--X--
33263Breather tubeXXXXXX
34407Flat washer A 6x10 Din 7603222222
352133Sliding piece111111
361835Tension pin 8x36 Din 1481111111
373225Crankcase cpl1--1--
373258Crankcase cpl-11-11
374131Crankshaft part exchange1--1--
374132Crankshaft part exchange-11-11
384163Connecting rod cpl11-11-
384162Connecting rod cpl-11-11
39424Needle bearing Red 0-2 / Blue 2-4 / White 4-6111111
40426Roller bearing NU 305 C3 Din 628111111
41693Ball bearing 3305 C3 Din 628111111
42547Sealing ring111111
43467Sealing ring111111
443220Duplex sprocket1-----
44714Triplex sprocket-11111
45713Spacer-11111
463240Guide nut on crankshaft111111
473254Securing plate111111
48862Washer 0.2 thicknBnBnBnBnBnB
483111Washer 0.3 thicknBnBnBnBnBnB
49522Piston std. 66.951--1--
492059Piston 1st oversize 67.101--1--
492060Piston 2nd oversize 67.251--1--
492061Piston 3rd oversize 67.401--1--
49532Piston std. 76.93-1--1-
492069Piston 1st oversize 77.08-1--1-
492070Piston 2nd oversize 77.23-1--1-
492071Piston 3rd oversize 77.38-1--1-
492072Piston 4th oversize 77.53-1--1-
492110Piston std. 81.92--1--1
492112Piston 1st oversize 82.07--1--1
492114Piston 2nd oversize 82.22--1--1
492116Piston 3rd oversize 82.37--1--1
492118Piston 4th oversize 82.52--1--1
50523Piston ring std. 67.001--1--
502064Piston ring 1st oversize 67.151--1--
502065Piston ring 2nd oversize 67.301--1--
502066Piston ring 3rd oversize 67.451--1--
50534Piston ring std. LD 77.00-1--1-
502076Piston ring 1st oversize 77.15-1--1-
502277Piston ring 2nd oversize 77.30-1--1-
502078Piston ring 3rd oversize 77.45-1--1-
502079Piston ring 4th oversize 77.60-1--1-
502111Piston ring LD Std. 82.22--1--1
502113Piston ring 1st oversize 82.15--1--1
502115Piston ring 2nd oversize 82.30--1--1
502117Piston ring 3rd oversize 82.45--1--1
502119Piston ring 4th oversize 82.60--1--1
51535Piston pin1--1--
51537Piston pin-11-11
52536Circlip222222
532154Radial cylinder cpl MC1-----
532157Radial cylinder cpl MC-1----
532161Radial cylinder cpl MC--1---
535698Radial cylinder cpl GS---1--
535715Radial cylinder cpl GS----1-
535725Radial cylinder cpl GS-----1
534135Cylinder part-exchange1--1--
534136Cylinder part-exchange-1--1-
534137Cylinder part-exchange--1--1
545038Cylinder liner1--1--
542159Cylinder liner-1--1-
542163Cylinder liner--1--1
55467Exhaust flange MC111---
555699Exhaust flange GS Ø20---1--
555716Exhaust flange GS Ø24----11
56298Gasket for exhaust flange111111
571704Spring ring B 6 Din 127444444
581635Socket screw M 6x25 Din 912444444
592156Cylinder head Radial1--1--
592160Cylinder head Radial-1--1-
592164Cylinder head Radial--1--1
6065Cylinder head gasket1--1--
60720Cylinder head gasket-1--1-
602582Cylinder head gasket--1--1
613004Cylinder base gasket 0.3 thicknBnBnBnBnBnB
61721Cylinder base gasket 0.5 thicknBnBnBnBnBnB
612237Cylinder base gasket 0.7 thicknBnBnBnBnBnB
622967Cylinder head stud5--5--
622968Cylinder head stud-55-55
631734Washer B 8.4 Din 125555555
6478Hexagon nut555555
651714Spring washer B 8 Din 137444444
661670Hexagon nut M 8 Din 934444444
67517Decompression valve cpl-11-11
682251Push pin cap111111
692252Spacer 1.5 thicknBnBnBnBnBnB
692253Spacer 2.0 thicknBnBnBnBnBnB
692254Spacer 2.4 thicknBnBnBnBnBnB
692255Spacer 2.8 thicknBnBnBnBnBnB
692256Spacer 3.2 thicknBnBnBnBnBnB
692257Spacer 1.75 thicknBnBnBnBnBnB
702889Push pin111111
711096Bearing plate111111
721084Needle cage111111
732886Guide for clutch disc111111
742890Washer 10.1x18.2x0.6111111
751842Securing ring111111
76449Cup spring202020202020
77448Guide nut111111
78447Lock plate for guide nut111111
792580Clutch body111111
80736Needle cage222222
81444Thrust washer111111
81.11884Spacer washer 17x25x0.2nBnBnBnBnBnB
81.13432Spacer washer 17x25x0.3nBnBnBnBnBnB
822895Clutch housing with kickstarter ratchet wheel1-----
822944Clutch housing with kickstarter ratchet wheel-11111
831906Oval head rivet888888
84729Kickstarter ratchet wheel111111
85730Kickstarter pinion111111
86731Ratchet spring111111
87732Spring cup111111
88733Spring ring111111
893390Inner disc666666
903396Clutch disc666666
913391Terminal disc111111
92461Circlip222222
932899Duplex-chain1--1--
932947Triplex-chain-11-11
94462Clutch spindle111111
95464Sealing ring for clutch spindle111111
962898Clutch lever111111
971732Washer B 6.4 Din 125111111
981690Hexagon nut NM 6 Din 980111111
992025Main shaft111111
1002043M S shim111111
10134411st gear pinion on mainshaft 19 teeth1-----
10134491st gear pinion on mainshaft 17 teeth-11111
1023706Spacer ring111111
10334354th gear pinion on mainshaft 26 teeth111111
10434343rd gear pinion on mainshaft 24 teeth1-----
10439673rd gear pinion on mainshaft 23 teeth-11---
10434433rd gear pinion on mainshaft 23 teeth---111
105492Retainer ring333333
10634402nd gear pinion on mainshaft 21 teeth1-----
10634482nd gear pinion on mainshaft 20 teeth-11111
1073723Shim for 1st gear222222
10820395th gear pinion on mainshaft 28 teeth111---
10820495th gear pinion on mainshaft 29 teeth---111
1093893Spacer washer555555
1103437Layshaft111---
1103445Layshaft---111
111913Needle cage K 16x21x10222222
11234381st gear pinion on layshaft 26 teeth1-----
11234461st gear pinion on layshaft 28 teeth-11111
1133442Twin block pinion on layshaft 19/21 teeth111---
1133450Twin block pinion on layshaft 18/21 teeth---111
1143456Shim for 2nd gear111111
11534392nd gear pinion on layshaft 23 teeth1-----
11534472nd gear pinion on layshaft 24 teeth-11111
1163757Needle cage K 20x24x12111111
1172037Drive shaft 28 teeth111---
1172048Drive shaft 29 teeth---111
1182038Plug111111
119339Ball bearing 6303 CS Din 625111111
120513Needle bearing HK 1612222222
121514Needle bearing BK 1616222222
122375Ball bearing 6206 2RS C3 Din 625111111
1232044Spacer ring111111
1243465Sprocket 13 teeth111---
1243720Sprocket 14 teeth---111
1251848Lock ring 29x1.5 Din 471111111
1262327Gear change lever111111
127556Rubber pad111111
1281570Hexagon screw M 6x25 Din 933111111
1291712Spring washer B 6 Din 137111111
1302324Washer 12.1x26.2x1111111
131573Return spring111111
1322503Gear change crank111111
1332336Pullrod111111
1342374Pullrod pivot arm111111
1351903Pivot arm A 8x20 Din 1469111111
1361836Securing ring 8x0.8 Din 471111111
1372376Hooked ratchet sliding arm111111
1382375Guide plate111111
1391795Countersunk screw 5x8 Din 965222222
1403326Hooked ratchet "T"111111
1412388Hook111111
1421667Hexagon nut M 6 Din 934111111
143576Tension spring for hooked ratchet111111
1443406Shifting plate cpl111111
1453402Shifting segment111111
1462397Shim 10.6x18.2x1111111
1472393Guide screw222222
148410Sealing ring A 14x18222222
1492395Tension spring111111
1502396Pawl pin111111
1512399Gear selection fork spindle111111
1523414Gear selection fork333333
1532566Kickstarter spindle cpl111111
1542559Kickstarter spindle111111
155761Kickstarter quadrant111111
156666Return spring111111
1571828Tension bush 5x26 Din 1481111111
1581753Shim 12.2x30.2x0.5111111
1593353Internal ring111111
1605035Kickstarter lever cpl111111
161656Rubber pad111111
1625033Kickstarter lever111111
1633867Compress spring for kickstarter111111
1641874Ball Ø7111111
1651840Lock washer RS111111
1665034Kickstarter joint111111
1671570Hexagon screw M 6x25 Din 933111111
1681704Spring ring B 6111111
1693598Motoplat Ignition cpl111---
1703530Rubber sleeve111111
1711630Socket screw M 5x16 Din 912333444
1721731Shim B 5.3 Din 125111111
1731123Nut for generator111111
1741881Woodruff key 3x3.7 Din 6888111111
1753600Ignition coil Motoplat111---
1761567Hexagon screw M 6x16 Din 933222444
1771732Shim B 6.4 Din 125444888
1781690Hexagon nut NM 6 Din 980222444
1793610Cable plug111---
1803576Connector 6,3-1 Din 46247111---
1813596Connector housing 6,3111---
1823595Connector 9,5-6 Din 46247111---
1833597Connector housing 9,5111---
1845396Bosch Electronic MHKZ---111
1855397Stator---111
1865398Rotor---111
1875399Electronic box---111
1885404Support for electronic box---111
1893884Cable plug water proof---111
190600Cable plug water proof---111
1911126Cable plug---111
192589High tension lead Ø Din 72561---XXX
1933308Connector---111
1943087Rubber cap for electronic box---111
1953305Connector female---444
1963577Connector housing---222
1973576Connector female 6,3-1 Din 46247---222
1985730Cable FLK B1 Din 72551 black---XXX
1992611Wire housing B Ø8x0,7 Din 40621---XXX
2002610Wire housing B Ø6x0,6 Din 40621---XXX
2012608Wire housing B Ø4x0,5 Din 40621---XXX
2022607Wire housing B Ø3x0,4 Din 40621---XXX
203603Spark plug Champion N 2111111
2045320Carburetor cpl Bing V54-2111111
205681Flange111111
2063143Carburetor manifold111111
207683Clamp222222
2948Small gasket set (pos 6,9,10,60,61)1--1--
2949Small gasket set (pos 6,9,10,60,61)-1--1-
2950Small gasket set (pos 6,9,10,60,61)--1--1
2958Large gasket set (pos 6,9,10,20,30,31,34,42,43,56,60,61,95,148)1--1--
2959Large gasket set (pos 6,9,10,20,30,31,34,42,43,56,60,61,95,148)-1--1-
2960Large gasket set (pos 6,9,10,20,30,31,34,42,43,56,60,61,95,148)--1--1
3602Sealing paste for ignition111111

NOTES:

X = Yard goods (sold by the meter)

nB = As needed

MC models: Motoplat ignition (pos 169–183)

GS models: Bosch Electronic MHKZ ignition (pos 184–202)

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