stephen123 Report post Posted June 7 This is a 2019 300cc gasgas that back fires on kicking any suggestions please Quote Share this post Link to post Share on other sites
slack Report post Posted June 7 Does it fire up? If not check the wudruff key or try a different spark plug.. 1 Quote Share this post Link to post Share on other sites
stephen123 Report post Posted June 7 When it starts it seems to run fine I've changed the plug a couple of times we bought the bike new but my lad put up with it he now has given trials up so I've now inherited the bike and problem could it be a faulty CDI unit thanks Quote Share this post Link to post Share on other sites
mcoulson Report post Posted June 7 When CDI went on mine, it backfired badly. Clean the pick up first as they can also rust. 1 Quote Share this post Link to post Share on other sites
stephen123 Report post Posted June 7 Ill will try that thanks but this has been doing it from brand new the bike is only 6 month old and at most only been used 10 times Quote Share this post Link to post Share on other sites
jonnyc21 Report post Posted June 8 If doing this from new might be running lean on the low end? Maybe adjust the air/fuel setting and check what jets are in it and? Quote Share this post Link to post Share on other sites
collyolly Report post Posted June 8 If you have had it from new could you not seek advice from the dealer ( If they are open of course ! ) Quote Share this post Link to post Share on other sites
stephen123 Report post Posted June 8 Thanks for all your advice I have spoke to tony today (road and trials)he told me to check a few of the simple things first Like carb done Spark plug done Loose connection on plugs done I'm going to try to change my cdi unit of my 2014 if it fits and then who knows Quote Share this post Link to post Share on other sites
