My force 125 was just rebuilt (new pistons - bearings etc)- It ran rough - and the mechanic put in a new powerpak and coil. This solved the shutter & Kick I had - but it still seems to "surge" at low speed.<br /><br />I am running in with about 1.5 times the normal oil during the break-in period.<br /><br />It seems to run a little rough - especially at mid- slow speeds. Is this due to the extra oil?<br /><br />What kind of performance should I expect at the mid-slow speed - where the carbs are just starting to open.<br /><br />It seems to "surge" as you are driving. Any Ideas on what to check??????? Or is it just the extra oil?????<br /><br /> 