the clutch bell and clutch spring should be changed right away to hpi or somthing else cause there not very good and i own a lightning i have 3 other cars and this is the only one i have had problems with on break-in it ran really good when i was done breakin it in i took it out the next day and it would hardly stay running settings werent changed or anything from the last run ive tried everything to get this thing running i just gave up engine is done i think wither that or its stuck in second gear i just shelfed it