what is cheaper

[sam the brave]

to have a 416 bigbore kit put in

or to have and engine pulled apart for inspection and to rebuilt to stock bore

[YZ400EX]

Its tough to say which would be cheaper..a 416 would be better. it depends on what shape the sleeve is in when you look at it..if it needs bored at all then just do the 416 because the piston will costs about the same as a stock piston and a bore will cost like $25 no matter how big you want so I would say it all depends on the condition of your sleeve when pulled apart, but the 416 would be a better idea if you already have it apart.

[TRXRacer1]

416 is cheaper if you need a bore, other wise your buying a sleeve too.