Crank Shaft Thread Sizes
 Manufacturer
Engine Designation
Thread Size
 ASP .21 ABC - .46 ABC 1/4" - 28
 ASP .61 all models, .75 ABC, .91 ABC,
.65 4-C, .80 4-C
5/16" - 24
 Enya SS.25, SS.25BB, SS.30, SS.30BB, .35X, SS.40, SS40BB, SS.45 Ring, .46 4-C, .41 4-C 1/4" - 28
 Enya .15, SS.15, .19, .19X, .21CX, .25X 6.0 x 1mm
 Enya .35, .40, .40X, .40CX, .49X, .45, .45CX, GP.45CX, .50CX, .60FXIII, GP-60XF-4, GP.60XF-4H, .60XLF, GP.60XLF-4, .60 4-C, .80 4-C, .90 4-C, 120 4-C 7.0 x 1mm
 Enya R120 4-C, R120GP 4-C 8.0 x 1mm
 Fox .19RC, .19CL, .25RC, .25CL, .35CL, .40RC, .40CL, .50RCBB, .45RC Schnuerle, .40 Quickie 1/4" - 28
 Fox .60 - .74 Eagle 5/16" - 24
 HB .20 - .61 all models 1/4" - 28
 HP .21 - .61 all models 1/4" - 28
 HP VT.21 4-C, VT.49 4-C,
.40FRT Gold Cup, .61FRT Gold Cup
6.0 x 1mm
 HP 1.20 5/16" - 24
 Irvine .20 - .61 all models 1/4" - 28
 K&B .20 - .65 all models 1/4" - 28
 Magnum GP.25, GP.40, Pro.25, Pro.36SE, Pro.40SE, Pro.46SE 1/4" - 28
 Magnum GP65SE, Pro.61SE 5/16" - 24
 MDS .46 1/4" - 28
 MDS .25 - .40 6.0 x 1mm
 MDS .61 5/16" - 24
 Merco .33 - .40 1/4" - 28
 Merco .50, .61 5/16" - 24
 Moki .61 Long Stroke all models 1/4" - 28
 Moki .51RC 6.0 x 1mm
 Morris .45 - .60 8.0 x 1.25mm
 MVVS .15 - .61 6.0 x 1mm
 OS .20 - .50 all models, .61SFN-H Ring,
.61RFN-H ABC, FS-26 Surpass, FS-40 Surpass
1/4" - 28
 OS .60FP ABC, .61SF all version, .61RF ABC, .61RF-P, .61RX-H, .61SX-H, .61VR-M ABC, .65VR-M ABC, .65VR-DF ABC, .91VR-DF, .81VR-M, .91FSR, FF-240, FS-70 Surpass,
FS-91 Surpass, FS-120 Surpass II,
FS-120 Surpass SP, FS-61, FS-90, FS-120,
FT-120II, FT-160
5/16" - 24
 Picco .21 - .45 all models 1/4" - 28
 Quadra Q-35 5/16" - 24
 Rossi .21 6.0 x 1mm
 Rossi .40 - .90 8.0 x 1.25mm
 Royal .25RC BB ABC, 28RC BB ABC, .40RC ABC Schnuerle, .45RC BB Schnuerle ABC,
.46RC BB Schnuerle ABC
1/4" - 28
 Saito .40 - .60 4-C 6.0 x 1mm
 Saito .65 - .90 4-C 7.0 x 1mm
 Saito 1.20 - 2.70 4-C 8.0 x 1.25mm
 Supertigre .19 - .56 all models, .60G, 60ST 1/4" - 28
 Supertigre S-90K, S-61K, X61K ABC RE 5/16" - 24
 Thunder Tiger GP25, GP42, PRO25, PRO46, F-54S 1/4" - 28
 Thunder Tiger GP61, PRO61, PRO120, F-91S 5/16" - 24
 Webra .21 - .60 all models 1/4" - 28
 Webra .80 - .90 all models 8.0 x 1.25mm
 YS all 2-cycle models 8.0 x 1.25mm
 YS all 4-cycle models except .53 8.0 x 1.0mm
 YS .53 4-C 6.0 x 1.0mm