View Single Post
Old 07-29-2009, 02:10 AM
Sydneysider's Avatar
Sydneysider Sydneysider is offline
Motorized Bicycle Elite Member
Join Date: Mar 2009
Location: Sydney
Posts: 189
Default Re: lean or rich help/

Blocked or restricted mufflers can make plugs black just like too rich fuel mixtures. If the problem occurred just after you put the expansion chamber on, Id say it would be that..
"....dunno what I did to my engine the other day but now my rear tyre wears out real quickly..."
Reply With Quote