fivebrick Posted March 15, 2015 Report Share Posted March 15, 2015 (edited) My bike runs fine 99.9% of the time. Last two outings for about 1-2 min the bike was knocking and sort of sounded like it wasn't getting enough fuel. During this I put the choke on and it sounded better (didn't ride with choke on just wanted to see what it would do). Turned choke off and it still ran but knocking and pinging a bit. Then after a minute or two it's just fine and rides normally. Totally went away both times and rode the rest of the day no problem-just wondering if anybody else has had this happen and what it was? Edited March 15, 2015 by fivebrick Quote Link to comment Share on other sites More sharing options...
steve_earle Posted March 15, 2015 Report Share Posted March 15, 2015 Is it doing it from first start? Are you riding in cold temps?, Could be carb icing. Or has the bike been left a while during rides, as it could be 2 stroke settling in the carb and crankcase and needs a bit of a clear through. Maybe water in the airbox or still damp on the filter after washing? Quote Link to comment Share on other sites More sharing options...
jfc Posted March 15, 2015 Report Share Posted March 15, 2015 If water cooled, worth checking your radiator was not clogged with dirt and just overheated (pinking) after a long hill climb or high revving section. Quote Link to comment Share on other sites More sharing options...
fivebrick Posted March 15, 2015 Author Report Share Posted March 15, 2015 Is it doing it from first start? Are you riding in cold temps?, Could be carb icing. Or has the bike been left a while during rides, as it could be 2 stroke settling in the carb and crankcase and needs a bit of a clear through. Maybe water in the airbox or still damp on the filter after washing? Let me check that air box and filter for dampness Quote Link to comment Share on other sites More sharing options...
fivebrick Posted March 15, 2015 Author Report Share Posted March 15, 2015 If water cooled, worth checking your radiator was not clogged with dirt and just overheated (pinking) after a long hill climb or high revving section. I'll check it, thanks JFC Quote Link to comment Share on other sites More sharing options...
jfc Posted March 24, 2015 Report Share Posted March 24, 2015 Bump, any update? Quote Link to comment Share on other sites More sharing options...
fivebrick Posted April 5, 2015 Author Report Share Posted April 5, 2015 (edited) If water cooled, worth checking your radiator was not clogged with dirt and just overheated (pinking) after a long hill climb or high revving section. JFC the bike seems to act this way after a long climb or high revving section just as you had mentioned. I am living with it becuause it happens so infrequently. I am pretty sure the radiator and fan are ok. Edited April 5, 2015 by fivebrick Quote Link to comment Share on other sites More sharing options...
lineaway Posted April 5, 2015 Report Share Posted April 5, 2015 Too lean of pilot jet. Nationals coming, ask Team Sherco what they run. Quote Link to comment Share on other sites More sharing options...
jfc Posted April 5, 2015 Report Share Posted April 5, 2015 (edited) As above, lean condition! To check- Float height Good fuel flow to carb (partially blocked tank air vent) fuel pump operation? Good flow of fuel into carb. Edited April 6, 2015 by jfc Quote Link to comment Share on other sites More sharing options...
billyt Posted April 6, 2015 Report Share Posted April 6, 2015 Fivebrick PM me I am in Scottsdale. Quote Link to comment Share on other sites More sharing options...
fivebrick Posted June 6, 2015 Author Report Share Posted June 6, 2015 Billy sorry just saw your post. Got it sorted, was a clogged pilot jet, thanks all. Quote Link to comment Share on other sites More sharing options...
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