690 Enduro Forum

Technical => What Broke? => Topic started by: brian68 on May 07, 2015, 08:50:05 pm

Title: squealing noise
Post by: brian68 on May 07, 2015, 08:50:05 pm
I have 250 ish miles on my 2014..  first day riding i noticed a strange squealing noise coming out the exhaust. its more noticeable when started up and shutting off. I read that the 690's have issues wearing out the rocker arm bearings. anyone here have similar issues? between this and the cam chain tensioner issue it seems that they need a high volume/pressure oil pump. Does anyone know if anyone makes one?
Title: Re: squealing noise
Post by: RiverRunner on May 08, 2015, 12:05:25 am
Put some miles on that bad boy!
Title: Re: squealing noise
Post by: brian68 on May 08, 2015, 08:32:59 pm
let my dealer know today about it.  he said not to worry about it. I   have built many two strokes as well as 4 strokes, i know what a bearing sounds like when seizing . I will let them look at it, then i will check the valve shims  and take a look myself.
Title: Re: squealing noise
Post by: Philip Pino on May 09, 2015, 05:19:18 pm
What year is your bike?  Does the squealing happen before and after the engine is started/shut-off when you turn on/off the ignition key?  I'm not sure of the non-abs bikes, but the 690's with abs squeal when you turn on/off the ignition.  I thought it was the fuel pump on my 2014, but I think it has something to do with the abs equipment.  If the squealing is while the engine is running, you may have a problem.  I hope this helps.

Title: Re: squealing noise
Post by: brian68 on May 10, 2015, 02:32:27 am
mine is a 2014.  i hear the noise when started and at idle , especia;y when shut off. i will try to post a video tomorrow. The noise you hear after the fuel pump primes up is the fuel bypass.  it is a whistling noise that stops when you start the motor. I am curious if anyone else has this. I ordered a manual cam chain tensioner, should be here next week. Just want to rule that out.
Title: Re: squealing noise
Post by: brian68 on May 27, 2015, 11:49:07 pm
well i traced the noise to the rings. hopefuly i dont have a broke ring. I will run my borescope down the plug hole and take a look . might be the excuse i need to do a big bore. 
Title: Re: squealing noise
Post by: brian68 on June 16, 2015, 04:43:11 pm
Well after reading about excessive oil consumption , from the rings not seating. i came to the conclusion that if the cam chain tensioner was not working right, that the engine would rock back and forth. bad for the rings, power and valvetrain. so i switched to rotella t3 to help the rings seat and installed a manual cam chain tensioner . no more squeal and i have regained the power i lost .  When i pulled the chain tensioner out it was soft and would squease right in. once the tensioner fills with oil it should stay pumped up. at least all the other motors i have worked on have.  So if you have a new bike make sure your dealer put mineral based oil in it when you pick it up and it wouldn't hurt to change it at 500 miles as reccommended, but refill with mineral for another 250-500. just to make sure the rings are good. And even if you dont think you have a issue with the chain tensioner i would change it ,or at least check it often. KTM's quality control sucks on this one. other bikes/quads last the life of the bike in most cases. Almost all ktm's have this issue some more severe than others.
Title: Re: squealing noise
Post by: Philip Pino on June 20, 2015, 03:43:44 pm
Brian, your the first I've read about having a problem with the cam chain tensioner on a 2014/15.  I was wondering if I should go with Rally Raids tensioner.  They seem to be the only one making a mechanical one for the 690.

I haven't checked the manual, are you say the bike requires mineral oil in the tensioner.  I thought it was fed oil from the engine?  Or are you talking about a petroleum based engine oil instead of a synthetic?
Title: Re: squealing noise
Post by: brian68 on June 21, 2015, 06:10:43 am
bought my tensioner from ebay not rally raid. Sorry i put regular (mineral based oil) back in the motor to help the rings seat. not in the tensioner. with my tensioner not working right , the slop in the chain was allowing my valves and piston to kick back when the engine stoped on the up side of the cam ramp. the back and forth motion is not good for the rings. and since i read about other people having issues with there bikes using oil. ktm tells the dealers to put regular oil back in them to help the rings seat to stop the oil burning. so im running it for a couple hundred miles or so just to be safe. then i will switch back to motorex.
Title: Re: squealing noise
Post by: Philip Pino on June 27, 2015, 01:23:34 am
Brian, thanks for the heads up on the e-bay tensioner.  The only one I see is the one from a vender in the Netherlands.  Is this the one?
Title: Re: squealing noise
Post by: brian68 on July 01, 2015, 05:42:46 am
that would be the one.  franks mx parts