yamahaty250xox Posted April 1, 2008 Report Share Posted April 1, 2008 hi replaced the plug on my 315r at the weekend and noticed it was coverd in black soot. the bike is also drinking petrol and and genraly not running well. could this be a problem with the carb settings? max Quote Link to comment Share on other sites More sharing options...
greenlaner1 Posted April 1, 2008 Report Share Posted April 1, 2008 its running rich, is it running bad all through the rev range or only at certain revs? will be the carb setup, might just be the pilot screw but may need to lower the needle or get smaller jets is the bike standard or has it had a straight through pipe on and then the standard one back on? if so the jets will be too big, either new jets or slap the straight through pipe back on GL1 Quote Link to comment Share on other sites More sharing options...
yamahaty250xox Posted April 2, 2008 Author Report Share Posted April 2, 2008 i am running a wez straight through pipe at the moment and i havent alterd the jetting. the bike is ok at high revs but at low revs it is a bit crappy Quote Link to comment Share on other sites More sharing options...
neil king Posted April 2, 2008 Report Share Posted April 2, 2008 (edited) what year model is it? Is this something that just started or has it been doing it since you got it? Edited April 2, 2008 by Neil King Quote Link to comment Share on other sites More sharing options...
yamahaty250xox Posted April 2, 2008 Author Report Share Posted April 2, 2008 it is a 99 and no it has been running fne until about 2 months ago. i will take the carb off and give it a good clean later cheers max Quote Link to comment Share on other sites More sharing options...
yamahaty250xox Posted April 2, 2008 Author Report Share Posted April 2, 2008 cleand it and its running perfect! looks like a bit of water and dirt combined! Quote Link to comment Share on other sites More sharing options...
neil king Posted April 4, 2008 Report Share Posted April 4, 2008 Glad to have helped, haha. Quote Link to comment Share on other sites More sharing options...
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