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Datsun 1200 GX used a matched pair of 38mm sidedrafts, referred to as front and rear carburetors. These are similar to S.U. brand carburetors. For more general information see Hitachi Twin Carb.
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Variations
Three variations were used in the 1970-1972 B110 JDM GX model run. All are dome-tops:
Original * 16010-H2332 CARBURETOR ASS'Y-twin, front ** 16010-H2333 CARBURETOR ASS'Y-twin, rear
November 1971 * 16010-H2334 CARBURETOR ASS'Y-twin, front (from '71-11) * 16010-H2335 CARBURETOR ASS'Y-twin, rear (from '71-11)
January 1973 * 16010-H2336 CARBURETOR ASS'Y-twin, front (from '73-1) * 16010-H2337 CARBURETOR ASS'Y-twin, rear (from '73-1)
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Part Names
Names
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Parts Breakdown
1 16122-H2310 SHAFT ASS'Y-throttle 2 16324-H2310 FILTER ASS'Y-piston 3 16144-H2310 NUT ASS'Y-idle adjusting 16144-H2311 NUT ASS'Y-idle adjusting (from '71-11) 4 16145-H2310 SPRING-idle adjusting screw 2 5 16355-H2310 NOZZLE ASS'Y 16355-H2310 NOZZLE ASS'Y (from '71-11) 16127-H2310 PLATE ASS'Y-throttle adjusting, front 6 16127-H2311 PLATE ASS'Y-throttle adjusting, rear 16277-H2312 LEVER ASS'Y-first idle, front 7 16277-H2313 LEVER ASS'Y-first idle, rear 16277-H2315 LEVER ASS'Y-first idle, rear (from '71-11) 16134-H2310 LEVER ASS'Y-throttle, front 8 16134-H2313 LEVER ASS'Y-throttle, rear 9 16083-58000 SLEEVE 2 10 16214-25610 NUT (8 radius) 2 11 16116-H2310 SLEEVE 2 12 16190-10401 SPRING-starter, return (B) 12 16190-74310 SPRING-starter, return (A) 13 16147-14611 PLATE-cam (B) 13 16147-74311 PLATE-cam (A) 14 16116-14610 SLEEVE (B) 15 16157-14610 SPRING-connecting (B) 15 16157-74310 SPRING-connecting (A) 16 16238-H2310 LEVER ASS'Y-choke, front 16 16238-H2311 LEVER ASS'Y-choke, rear 17 16147-H2310 PLATE-connection, front 17 16147-H2311 PLATE-connection, rear 18 16227-H2300 ADAPTER-front 18 16227-H2311 ADAPTER-rear 19 16322-E3210 BOLT (8Ø) (2) 20 16356-25610 PIPE-rubber, fuel (2) 21 16358-E4310 CLIP-fuel pipe (4) 22 16061-K1407 Float $13 USD * superceded 16061-10400 FLOAT * 23 16101-H1000 VALVE ASS'Y-needle * 16101-18010 VALVE ASS'Y-needle (from '71-11) 24 16062-10400 LEVER-float (up to '71-10) (2) from '71-11 * 16062-H2310 LEVER-float, front (from '71-11) (1) * 16062-H2710 LEVER-float, rear (from '71-11) (1) 25 16066-25610 SHAFT-float 26 16331-10400 SCREW-nipple set 27 16098-25710 FILTER 28 16554-H2310 JET-needle 28 16554-H2316 JET-needle (from '71-11)29 16031-A8710 PLUG-drain 30 16148-H2310 CLAMP-choke, front 30 16149-H2310 CLAMP-choke, rear 16149-H2311 CLAMP-choke, rear (from '71-11) 31 16346-10615 SPRING-suction 32 16341-25610 NUT ASS'Y-oil cap
33 16194-H2310 SPRING-throttle 16194-H2311 SPRING-throttle (from '71-11) 16194-H2312 SPRING-throttle (from '73-1)
Piston with Needle Jet and needle set-screw
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Carburetor Linkage
1 08915-43810 WASHER-plain (4) [fixing carburetor to manifold] 2 08915-13810 WASHER-lock (4) [fixing carburetor to manifold] 3 08911-20810 NUT (4) [fixing carburetor to manifold] 4 16361-H2300 SHAFT ASS'Y-throttle 5 16376-H2300 BRACKET-accelerator cable 6 08915-13510 WASHER-lock,fixing accelerator cable bracket 2 7 08460-51000 SCREW-fixing accelerator cable bracket 2 8 16031-H2300 TUBE-over flow, front 9 16031-H2301 TUBE-over flow, rear * 16031-15801 TUBE-over flow, (Vinyl 6 x 9 x 160) 2 10 14012-H2300 BRACKET-over flow tube 10 14012-H2330 BRACKET-over flow tube (from '72-5)
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Maintenance Parts
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GASKET SET
16455-H2310 GASKET SET * A 16335-14610 PACKING (10Ø) (4) [for inlet banjo] * B GASKET-float chamber (2) * C WASHER (8Ø) (2) [for fuel drain plug] * D PACKING (18Ø) (2) * E WASHER (10Ø) (2) [for fuel needle & seat ASSY]
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SCREW & WASHER "B" SET
16475-H2310 SCREW & WASHER "B" SET * F PACKING (12}} * G WASHER (7Ø) (4) [for pump lever end] * H WASHER (5Ø) (2) [for lever linkage] WASHER (4Ø) (2) * I PIN-cotter (1Ø) (2) [for pump lever] * J WASHER-thrust (2) [for throttle shaft] * K BOLT (5Ø) (2) [for lever linkage] BOLT (5Ø) (2) * L WASHER-lock (7Ø) (2) [for lever linkage] * M SCREW-set, needle jet (2) [these screw into the piston]
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SCREW & WASHER "A" SET
16465-H2310 SCREW & WASHER "A" SET * N SCREW (5Ø x 16) (16) [for dome, etc] * O SCREW (5Ø x 12) (2) [for choke cable bracket] SCREW (4Ø x 10) (2) SCREW (4Ø x 8) (4) * P WASHER-lock (8Ø) (4) for though-bolt which fastens float bowl to throttle body, and for throttle lever next to tubular nut * Q WASHER-lock (5Ø) (18) for choke cable bracket, dome screws, etc * R WASHER-lock (4Ø) (2)
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Repair Kit
This repair kit contains hard to find parts. But only the GASKET SET is normally needed. If your carb leaks fuel into the fuel bowl (overflows) you will need new Valve assemblies. For A12GX, it uses the same valve assembly as the DCG306 downdraft carburetor (two of them).
Keyster Kit No. K14-0050HW Datsun Fairlady (Roadster) 1600 SPL311, 2000 SR311, S30 R, 1600 L20, 2000cc 1965- For carburetor No. 16010-14603, 25601, 16010-E32001
Keyster Kit No. K11-0050HW (DCK-10) From 1965 Aug Fairlady R16 carb 16010-14603 From 1970 Aug Datsun 1200GX A12 carb 16010-H2300-1 16010-14603RK GASKET KIT K12-0050HW NEEDLE K25-0050HW Appears to contain one Needle Jet for 1200GX and one for Fairlady
Keyster Kit No K15-4676HW From 1979 Oct Datsun Bluebird 910 SSS L18T Carb 16010-K1433(FR) 16010-K1433RK Gasket Kit K12-0050HW Needle K25-411H
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Comparison
USA twin carb 38mm models * P410 Bluebird SS (410 1200 with E12 engine) * P411 Bluebird SS (411 1300 with J13 engine) * R411 Bluebird SSS (411 1600 with R16 engine) * SPL310 1600 Roadster (single or twin with R16 engine) * SRL311 2000 Roadster (with U20 OHC engine) 16101 JET-NEEDLE 16354-14610 Datsun Sports Roadster R16 USA $12.47 USD [M36] 16354-15810 Datsun Sports Roadster R16 USA $12.55 USD [M43] 16354-A7710 Datsun Sports Roadster R16 USA $15.48 USD [M70] 16354-25611 Datsun Sports Roadster U20 USA [N19] 16354-A7810 Datsun Sports Roadster U20 USA [N25] 16354-12210 Datsun 410 SS/DP410 MTK $12.53 USD [M15] 16554-H2310 1200GX, PE10 A12T dome top NLA 16554-H2316 1200GX (from '71-11), PE10 A12T, $10.37 USD [M83] 16455-H5701 B210 A12T JAPAN NLA 16554-H5701 B210 A12T JAPAN, 1975 PE10 A12T NLA (M-89) 16354-16710 411 SS NLA [M6] 16354-16711 411 SS NLA (M40) 16354-16712 411 SS NLA (M44) 16354-15810 411 1.6 $12.55 USD [M43] 16354-22011 510 L18T, L16T NLA [M66] 16354-A8710 N510 1600 SSS NLA [M76] 16354-U0810 510 L16T, L18T from '72-7 16354-H6000 710 L16T NLA [M87] 16354-K1410 710 L16T from '73-7, 1975 610 NLA (M-87) 16354-A8710 610 L16T, L18T NLA (M-76) 16354-U0810 610 L16T, L18T from '72-7 NLA (M-76) 16354-U0810 610 flat tops from '72-7 NLA (M-86) 16354-E3210 M73 15354-10400 M26
Comparison of M83 vs M66
Suction Spring (a.k.a. dome spring) 16346-10615 411 SS, all A12T, A12GX NLA 16346-12210 411 1.6, 510/610/710 L16T, L18T $7.97 USD * also same used by 46mm 240Z carburetors 16346-25610 SRL311 2000 U20
The spring determines when the max opening occurs. Ideally the piston should rise fully (maximum airflow) only at peak HP. A lighter spring (such as Datsun fitted) will allow it to open fully sooner. A heavier spring delays full opening. NOTE: For adjusting transient airflow (quick throttle openings), you can use diffrent weight damper oil.
KIT B CARB 16010-14626 Datsun Sports Roadster R16 USA $40.45 USD
KIT D CARB 16010-14628 Datsun Sports Roadster R16 USA $112.03 USD formerly X6010-14628
Oil Gap Gasket 16342-10400 GASKET $1.05 USD
16101 VALVE-NEEDLE [fuel inlet valve] 16101-10400 Datsun Sports Roadster R16 USA $16.13 USD 16101-G2800 1200GX $13.27 USD (formerly 16101-H1000) 16101-18010 B210 A12T JAPAN 1.5o and it seems all Dome Tops use this part Flat tops use a different one The 46mm fuel bowl top bolts on but uses yet another valve
Float chamber 16064-22010 Gasket-cover $1.65 USD
Oil Cap 16341-25610 Nut-oil Cap $16.87 USD
1200GX GASKET KIT $4.75 USD Kit Screw B $6.38 USD Kit Screw A $4.08 USD
16175-A5101 Gasket-carb $19.90 USD
M-87
http://www.mintylamb.co.uk/suneedle
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