Shop › 145864 Image 1 of 1 145864 $40.00 Crank shaft timing gear for double row chain. Made in England. TR250-TR6-GT6. 145864, CC56, 837-100. Add To Cart Added! Crank shaft timing gear for double row chain. Made in England. TR250-TR6-GT6. 145864, CC56, 837-100. You Might Also Like 145865 $50.00 Lower Engine from $1.00 Oil Pan Gaskets from $6.00 145866 $25.00 42425 $25.00