1990 dr250s fmf exhaust

Discussion in 'Thumpers' started by 93Dr350s, Apr 25, 2013.

  1. 93Dr350s

    93Dr350s Adventurer

    Jun 5, 2011
    Picked up a 1990 dr250 and have a fmf pipe lying around I'm gonna throw on I no I have to rejet I'm gonna put a 137.5 in there and hopefully it's good to go will that be too rich without the airbox mod?can I do the airbox mod has anybody done it on a 250 before? I have an aftermarket air filter in there too I think it's a k&n or something like that. Any input would be great