atc 250r

[liszewski_88]

i know that honda made a 300 big bore kit for the 250r 81-84 but did they make them for the 85 and 86's?

[NOS_350X]

honda dosent make peformance parts like that they would be have to be aftermarket
and i'm sure they make bigbore kits for the 85/86 250r atc

[250rAL]

It was a Mugen kit that you would get through a dealer just like any other of the optional accessories. I've never heard of one for the waterpumpers.

[atc86r]

a guy on macdizzy.com has a mugen cylinger and head on his 87250r. He's since had it setup for orings and ported some more.

[MR ATC]

Mugan is Honda's offical performance line. they do have mugan cylinders for the 85/86. they do not run sleeves like stock. they have nikelsol coating like most moder 2 strokes. the range from 250cc to 360cc