02-05-12, 06:42 PM
my brother in law just rang about his lads learner bike running rough. its a jinlun texan and is a 125 twin chopper styled thing :biker . he has only had it a day and all is not well. it ticks over nicely and revs ok but when he rides it it is powerless and backfires all the time. i told him to check for leaks and look at air filter and clean and gap the plugs. other than that i dont really know. any ideas?