pretty sure ther 198cc buddy not enough close pfft and u probly dont ahve the chain adjusted right i have the exact same one but with a torque converter on it and the chain has never came off and ive had it for about 1.5 years
i dont get why canadian tire bike is so bad like its may have some cheap stuff on it but its still good like it cost half of much as a "brand name" bike and there just not ment for as much as a beating that a brand name bike can handle and there even as much fun to ride