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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
port,polish, & piston size and brand
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[QUOTE="eddie1, post: 1257708, member: 81078"] [b]port,polish, & piston size and brand pictures[/b] ok just took off the entire top end off my 1990rm250 inspected it and the left side of the piston is totaly blownout the rings r flush with the head n the hole side of the head is scratched n has groves init along with the left side of the engine head. if im correct i need to get the head ported and polished and it will be smooth an uniform again? if not what then? and once this is done will a standard 67mm piston fit or do i have to buy a oversized one 0.20, 0.40 ect? and what brand of piston would you guys recommend for the longest life? life over performance. Also there is no sleeve in the head that slides out or nothing is this normal? also and pointers or tips in rewbuilding an engine correctly n rightly? any help is great this is my first engine rebuild. Eddie [IMG][IMG]http://i32.tinypic.com/25frtpu.jpg[/IMG][/IMG] [IMG][IMG]http://i29.tinypic.com/206hj7o.jpg[/IMG][/IMG] [IMG]http://i31.tinypic.com/jj8vsx.jpg[/IMG] [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
port,polish, & piston size and brand
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