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mxz_rider18 · 01-06-2013, 07:12 PM

Hello all
I'm really not sure if I'm suppose to be posting here or not. I'm in need of some expertise.
I run a 96 mxz 583 and my brother has a 95 formulaZ 583.
Ever since he bought his I have done the work and he is having and has had a real issue with fouling plugs. I'm stumped. It always seems to foul them at low rpms or putting along, and there is know order to which one it fouls.We are running BR9ES plugs. I haven't any issue with mine. Any help would be greatly appreciated.
Thanks so much.

**smallengineguy** · 01-07-2013, 06:16 AM

CHeck his chokes to make sure they are closing all the way when the sled is warm. There should be 1/8" of play in the choke cable.

**BC_Dan** · 01-07-2013, 08:35 AM

Also check the oil pump for adjustment. It may be giving too much oil.

Welcome to the forum!

mxz_rider18 · 01-08-2013, 06:08 AM

Its got a primer and i have set the oil pump....would it be possible that the mains and seats could be bad? Im just out of ideas.
Thanks for the help