nedj10 Posted March 7, 2010 Share Posted March 7, 2010 Help please! my seca has started making a whirring noise I can best describe as the sound a loose powersteering belt makes on car when the seca's engine revs. I thought it might be the oil I was running not working well with our winter temps so I changed the oil to a 10w30 non synthetic and it quieted down for a day or two but has come right back, the noise sounds like its coming from the cylinder side of the engine but as its internal theres no real signs I can diagnose. any ideas would be helpful thanks Ned Williams Link to comment Share on other sites More sharing options...
dtmf Posted March 8, 2010 Share Posted March 8, 2010 have you checked to make shure oil is making it's way to the top of the head? Link to comment Share on other sites More sharing options...
nedj10 Posted March 9, 2010 Author Share Posted March 9, 2010 have you checked to make shure oil is making it's way to the top of the head? Not to sound stupid but how? pull the tank pull the head cover and see if oil squirts onto the valves? thanks Ned Williams Link to comment Share on other sites More sharing options...
dtmf Posted March 10, 2010 Share Posted March 10, 2010 there is a check bolt on the RH side of the head . have you downloaded the manual ? it's stickied @ the top of the thread's for the classics http://www.yamahaclub.com/forums/topic/16081-xs400-links/ . loosen the oil galllery bolt on the RH cylinder. start the engine keep idling until oil begins to seep out . if no oil come's out then you have a problem. the bolt is on the RH cylinder just under the cylinder head plug . i think it's like 10mm with a philipshead center Link to comment Share on other sites More sharing options...
nedj10 Posted March 16, 2010 Author Share Posted March 16, 2010 Ok I found the bolt, pulled it, oil dribbled out in a nice steady stream. Now the odd part, the noise started up and with the bike in the garage at idle it sounded like it was come from the speedo? I pulled the light and the gauge back, and disconnected the speedo cable..no noise? Put it all back together, and its been idling for 15 mins without noise...I will take it out for a spin in a bit to see if I can get it to do it again. odd Ned Link to comment Share on other sites More sharing options...
Moderator drewpy Posted March 16, 2010 Moderator Share Posted March 16, 2010 Ok I found the bolt, pulled it, oil dribbled out in a nice steady stream. Now the odd part, the noise started up and with the bike in the garage at idle it sounded like it was come from the speedo? I pulled the light and the gauge back, and disconnected the speedo cable..no noise? Put it all back together, and its been idling for 15 mins without noise...I will take it out for a spin in a bit to see if I can get it to do it again. odd Ned maybe it just needs its annual oiling! Link to comment Share on other sites More sharing options...
dtmf Posted March 17, 2010 Share Posted March 17, 2010 i would check the tach cable as well . be carfull pulling that one during idle it is spining Link to comment Share on other sites More sharing options...
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