So I got my new fuel hoses and ran the bike for the first time. With the bike running I'm hearing this noise. My phone actually picks it up even more than I can hear it, but maybe someone can shed some insight.
By rebuild, I mean I took the head off and installed it again. All the shims were the same thickness so I didn't think the order mattered (unfortunately they fell out when I was taking the head off. I also believe it's timed right.
http://www.youtube.com/watch?v=XXSKl1JCK-A
Any help appreciated.
And as an aside, I'm getting a bit of an oil pool on the front of the engine at the bottom. I had this when I fired up the bike back in August but I tightened the cylinder head bolts down to spec just to make sure. When I was doing this, my torque wrench could still slightly spin them even after it clicked. Because of this, I clicked each one at least twice.
Did you tighten the bolt on the front that goes UP from the jugs into the cylinder head?
Could you have a leak from the cam chain tensioner?
Scrub clean then baby powder it to see where it is originating from.
There is a low passage between the cylinders where oil from the cam chain tensioner can drip down then go through to the front. Probably that passage is there so water doesn't pool on the back of the jugs then start to boil and crack things when you start up the bike.
I'm thinking I did but I will definitely go over it again with the torque wrench. I'll also see if my cam chain tensioner is tightened, but I never loosened it and didn't have this problem before.
Any ideas on the clicking?
QuoteCould you have a leak from the cam chain tensioner?
this was my problem when i rebuilt. same pool of oil right under "487cc" drips out of tensioner, runs forward through the air passageway in the center of the block. since you never removed it, im not sure how you were able to get the chain loose enough to remove the head. Try resetting the cam chain tension too.
option 2- tomb's disease: the little copper washers that go under the head nuts are actually gaskets, they seal the oil in by deforming when they are torqued down. they need to be replaced, this happened to tombstone, and his bike hemorrhaged oil when it ran. if you didn't replace those guys that may be your problem.
also there are some little gaskety o ring things in there between the head and jugs other than the main gasket. if you didn't replace either the ring gaskets or head gasket you may have a leak there.
as for the rattling???? i have no idea. if its intermittent maybe some piston slap? its cold and hasn't warmed into its groove yet?
Would a loose tensioner, or at least one that's loose enough to leak oil, cause this noise? I'm guessing if it's loose it's going to rattle a little, but this sounds more like it's coming from the front top.
Maybe a dumb question, but did you take the head off or the head cover? And are the shims the valve shims or something else?
If I was hearing the right thing in the video, the clicking seems to be right in step with the rpm's (maybe with more than one click per revolution -- I couldn't tell). While you were in the engine, did you check the valve clearances?
I took the head off, not just the valve cover. I had to drill out my broken exhaust bolts and taking the head off was the only way. Unfortunately, I didn't check the valve clearances because when I took it apart everything sounded great in terms of engine noise.
The clicking seems to be a pattern, yes, but I can't really hear it when I rev it because the exhaust is so much louder. I'll take it outside tomorrow and see if I can hear it better.
as a side note, some times my engine rattles a little bit. a little tiny tapatapatapatap and then its done, happens randomly. Never noticed any detriment to performance associated with it. I think its just the valves. they make noise some times.
My son's '95 GS5 did that right after we replaced the intake shims, and tapatapatapatap is a great description for the sound. It only lasted a little while, and hasn't done it since.
Watevaman -- Does the sound change as the bike warms up? Also, you mentioned the shims (I'm assuming valve shims, here) fell out and you replaced them, but maybe they were switched. The shims are really hard and don't wear easily, but they can wear. If you can stand taking the head cover off again, I'd suggest checking the clearances just so you know.
The sound actually seemed to start more as the bike warmed up but it might have been my imagination. I might ride it for a little and see if it changes, because I really don't want to open up the engine again if at all possible.
And Funderb, I didn't remove the tensioner itself, but I did loosen (I guess this is the right word?) it so it wasn't putting tension on the chain. I didn't replace the washers, but they also weren't very deformed in the first place. Might've been a stupid decision in retrospect. I'll start with the tensioner and move from there.
probably not this.. but leaky exhaust gasket?.. they make some funny and different noises depending on situation.. and change to a hiss as the pressure climbs .. which could fade into the engine/exhaust "whitenoise"?? .. just thinkin ... errr ok.. tryin to thinkin ... out loud here.
I had a tapatapataptapa noise and it turned out to be my exhaust header bolts were loose. You mentioned you had to drill yours out? Are you sure the new exhaust bolts are torqued down to the correct spec?
i think the exhaust re-torque and maybe a new gasket set may be a cheap avenue to approach the tapping. good suggestions.
have a close listen to your headers at the block, when i put my fzr back together and the headers weren't on right, it sounded like the engine was coming apart, and there was shitloads of smoke. probably because they were burning out oil from the rebuild.. but still, good idea to check the header bolt torque, but carefully, dont break am again! :icon_mrgreen:
Exhaust gaskets are new with the head being taken off. And unfortunately I don't have a torque wrench that can fit in there so I tightened them as tight as I could without breaking them. Any tighter and I feel I'm going to break something. Of course, I am tightening them cold.
I fired the bike up this morning and noticed the clicking isn't there on startup and progressively gets louder as the bike warms up. So let me check the exhaust bolts while hot this afternoon and see how they feel.
Edit: I also did retap the exhaust bolt holes but I used the same size tap. Maybe there's miniscule play in the hole and the bolt is vibrating enough? Not enough to back out or anything though.
its more important to have them tightened evenly than to proper torque. i don't think thats your problem, but who knows.
Well I don't know if it's just me, but it seems to have gone away or at least is more intermittent than before. I took the bike out for a ride and while I could still hear a faint clicking, it's nowhere near as it was in the video.
However, I'm still trying to source this oil pool. Haven't tightened anything yet as I'm waiting until I have a free day to really take a look. Probably going to do something this weekend.
awesome stuff, dude. It may be just been the tappets and shims and everything settling into place. Mine was a little tappy just when it just started up.