Click to enlarge

"NOTE" THIS WILL NOT WORK WITH STROKER CRANKS !!

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YOU CAN BORE THE STOCK CYLINDER THIS BIG

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WE ONLY HAVE A FEW LEFT OF THESE, AND MAY NOT BE ABLE TO GET MORE ?

FITS:

ALL ATC70 TRX70 SL70 XL70 CL70

ALSO 1981 AND OLDER C70 AND CT70

I WOULD ALSO GET THE 50MM/.020"=.5MM HEAD GASKET BELOW.

OR

OUR 200010 51MM TOP END KIT WORKS FINE TOO.

PRE_"1982"_70CC 50MM_PISTON_KIT 75CC_BIG_BORE_KIT PK100$49.99

COPPER_HEAD_GASKET 50_&_70_HONDA'S XR_CRF_Z_CT_ATC TRX90_&_70 ALSO LIFAN AND ZONGSHEN COPPER_HEAD_GASKET 50_&_70_HONDA'S XR_CRF_Z_CT_ATC TRX90_&_70 ALSO LIFAN AND ZONGSHEN
COPPER_HEAD_GASKET 50_&_70_HONDA'S XR_CRF_Z_CT_ATC TRX90_&_70 ALSO LIFAN AND ZONGSHEN CU/50/70/90$11.95PICK_BORE/THICKNESS: 
TOP_END_GASKET_SETS (PICK_BORE_SIZE) 39_47_51_52_54MM<p>(Z50A_Z50R) (XR50_CRF50) (CT70_SL70_XL70) (XR70_CRF70) (ATC70_TRX70_TRX90) TOP_END_GASKET_SETS (PICK_BORE_SIZE) 39_47_51_52_54MM

(Z50A_Z50R) (XR50_CRF50) (CT70_SL70_XL70) (XR70_CRF70) (ATC70_TRX70_TRX90) THIS KIT HAS EXTRA PARTS YOU WON'T USE,, THIS WAY IT WILL WORK FOR DIFFERENT MODELS.

THIS WILL WORK FOR ALL YEARS OF 50'S 70'S AND TRX90'S

PICK_BORE_SIZE SEE DROP BOX BY ORDER BUTTON

ALL/YR/T/G/S$17.99PICK_BORE_SIZE: