Request for Oversize Honda Fit Pistons
#25810 from Sandy Shamlian · Rule change · TB 19-02 (2019-02 Fastrack)
In GCR section 9.1.1.B.14.b.2, make changes as follows:
“Honing of cylinders is permitted to a maximum diameter of 73.065 73.315mm (2.8766 2.8864
inches). Fitting of cylinder sleeves is prohibited. Re-boring to over size is prohibited.”
In GCR section 9.1.1.B.14.e, make changes as follows:
“1. Honda Fit OEM standard size pistons, PN: 13010-RB1-000, or Honda Fit OEM 0.25mm
oversize pistons, PN: 13020-RB7-Z00, must may be used.2. The use of over size pistons is not permitted.3. 2. Piston dimensions and weights:
Show 6 more lines
a. Maximum standard piston diameter, measured at a point 16mm from the bottom of the
skirt: 72.990 73.240mm (2.8736 2.8834 inches).”
“4. 3. Piston rings must be as used in the Fit engine. Two compression rings and one 3 piece
oil control ring must be used.
a. The standard ring pack, PN 13011-RB1-004 (Riken) or 13011-RB1-006 (Nippon), or the
oversize ring pack, PN 13021-RB7-Z01 (Riken) or 13021-RB7-Z02 (Nippon), may be used.”