Adjusted valves....STILL ticks

**Kerick** · 11-15-2009, 05:44 PM

Well I adjusted my valves today, were almost spot on did a little adjusting set them to I=.003 in; E=.005 in, Theres still a tick tick tick noise coming from somewhere what could this be any ideas appreciated...Mabye Cam chain?

Heres 2 vids of the engine running...
http://s762.photobucket.com/albums/x...1113091532.flv
http://s762.photobucket.com/albums/x...nt=225tick.flv

**MudBug** · 11-15-2009, 05:47 PM

check that your header is tight to the engine with no leaks.

**Kerick** · 11-15-2009, 06:03 PM

I actually did check that but I dont think its leaking because when I fire it up it smokes and i didnt see any smoke coming from there

**MudBug** · 11-15-2009, 06:09 PM

when its idling, cup your hand around where the header joins the motor. If you feel any air on your hand at all, the engine doesnt have enough back pressure, causing the exhaust valve to "tick"

**Kerick** · 11-15-2009, 06:16 PM

ok i just went out and tried that and didnt feel any air on my hand

**mike1979** · 11-15-2009, 06:32 PM

On my ATC I have a cam chain tensioner, if it is out of adjustment it will sound about like that. Does yours have a tension adjuster?

**Kerick** · 11-15-2009, 06:36 PM

Yes I was thinking it might be that my manual is kinda unclear on how to do it. The pic of it is nothing like mine. If anyone can explain that would be awesome. I think I have to take the cover off loosen locknut turn adjuster so it lines up with locknut start it and see if it spins if not back it out if yes leave it? Is tht right???

**Kerick** · 11-15-2009, 07:28 PM

Heres an exerpt from the manual saying how to adjust the cam chain-(click on it once it opens and it should zoom in)
http://s762.photobucket.com/albums/x...amadjuster.jpg

I also included a pic of waht looks like my cam chain adjuster and they dont look the same, the one in the manual and mine

**85Tecate** · 11-15-2009, 08:16 PM

It could be timing chain slap. I would check the timing chain and tensioners for wear.

**Kerick** · 11-15-2009, 08:18 PM

Originally Posted by 85Tecate

It could be timing chain slap. I would check the timing chain and tensioners for wear.

Im gonna go check out the chain what do the tensioners look like?

**Yamaha_Rules69** · 11-15-2009, 08:24 PM

^ I think he was refering to the chain guides that are in the jug slot that run down into the bottom end. Look up the engine top end in the manual, and you should see the two slides. That tick sounds awful loud from the video. I have seen two different YTM's that had a broken rocker arm and ticked really loud just like that. When you were adjusting the valves, did you notice excessive movement on one or the other rockers? Is one of the adjuster screws down much farther from the other? Good luck. ------------ Jon.

**Kerick** · 11-15-2009, 08:28 PM

Both the rocker arms barely moved at all, set em to .003 and .005 just like manual said. I just went to check the cam chain and the screws holding the cover on are sooo tight or rusted shut i cant free themm...WHY did Yamaha make phillips head screws on their engines?

**85Tecate** · 11-15-2009, 08:49 PM

Originally Posted by Kerick

Im gonna go check out the chain what do the tensioners look like?

Yes im sorry i meant the chain guides. Check them for wear. Alot of times the chain will wear them down and the chain will slap against them.

**Kerick** · 11-15-2009, 08:50 PM

thanks for the tip ill check them out as soon as i get this cover off lol

**Louis Mielke** · 11-15-2009, 09:17 PM

replace the timing chain. There's almost not a single one of these 20 year old machines that don't need the timing chains replaced. The tensioner on the YTMs is automatic. Seriously, it needs a timing chain.

Thread: Adjusted valves....STILL ticks

Thread Tools

Adjusted valves....STILL ticks