Quote Originally Posted by SUPAJAY View Post
Having the same issue with my xs. We ported the stock holes to flow more air. But needs more. 29 Promax
it wasnt as bad with my 250xs I had before. i was told the 300x dosent make as much torque at lower rpms then a xs so this is why this has now become a problem. i also own a 28 promax and its better out of the hole since the hub is a bit smaller and exhaust can seep around the hub a bit. smaller pitch and smaller dia. also must help i imagine