Well 32 is about 90f. Humidity around 90%. yeah maybe it is about ethenol. But found away around it. Put my Bucks oil filter cooler back on and put in ear plugs. Cheap and easy

i will have to get one of them Bucks oil filter coolers. not to cool the oil but as a protection for the filter.i had a stone go through my last filter. at the moment i have a piece of 2 inch split poly pipe over it.works but dont look good.
johna

aren't the addatives just put in the regular? i wonder if a jump to mid grade would help at all. i understand there are a lot of smaller engines (ie. chain saws, weed wackers) being ruined by the ethenol. wonder if its having any effect, other than pinging, on our bikes?

cass

I've used lead substitute in my boat and recently in my scoot. You may want to try it.

It should help lube the valves and tame the pinging. Most auto stores carry it.

A place near me sells "real gas," i.e. no ethanol added. I've tried it, as well as octane boost, mid grade, premium, lead substitute, MMO, oil additives, etc., etc., etc., with absolutely no positive effect whatsoever on the racket this motor makes when it's hot. Period.

I love my bike, love the power, the handling, the comfort, the look, the gearing, the brakes, the chrome....the love list is long.

But I hate the noise this motor makes when it's hot. Ain't no gettin' around that fact. It has made the same ping/knock/clatter noise no matter what mods I've done. It did it stock, with pipes, with BAK and jetting, AIS on or off. Nothing has changed this basic characteristic.

If I ever figure out why my bike sounds like a blue printed hot rod when it's cold but a piece of worn out farm equipment when it's hot I'll certainly share it with everyone here; it will be, perhaps, the biggest mechanical triumph of my life!

Thought I'd bump this thread up and see if some wisdom can be gained.

In the last week I've ridden quite a bit and done a few things that seemed to help a little, but by no means did anything eliminate the racket. One, while riding through town with my wife I reached down and turned my PMS out about 1/2 turn (not sure where it's at exactly now, but not important), and I sorta kinda think it quieted the knock/ping a little. Tried a tank of MidGrade, which seems to have had no effect whatsoever. Change my oil to Mobil 1 V-Twin 20/50, and that seems to have had no effect whatsoever, either. (I was running Mobil 1 15/50 synth.)

Here's the thing: this noise is unlike any other noise I've dealt with in the past 40 years of riding motorcycles, because it ONLY happens between about 1/16th throttle and 1/8th throttle. This leads me to believe that it's not valve train noise, since that would be happening all the time. And it's not a case where lack of octane is causing the ping, since that would get progressively worse the more throttle you rolled in. This is the point that I'm not sure I've been able to make here to the knowledgeable guys like Doc, Musky, Gram, et al,: If I'm going up a hill at about 1/4 throttle in say, 3rd gear, the motor sounds awesome...no problem. It's at the top of that hill, when I roll the throttle back into the 1/16th - 1/8th zone that my motor gets LOUD again.

I tried explaining this last year, but I'm not sure if I ever made this point exactly, that I can be chugging or revving up a hill and all is wonderful until I roll the throttle back down into that "Zone."

What this also means to me is that no explanation to date is accurate. Yamaha says that the big engine parts need good oil to keep 'em quiet. OK, so why are they quiet under a good load? Doc, you've said that if the valves are noisy when it's hot, they need adjustment. But wouldn't they be loud at all throttle settings?

I'm wondering if perhaps the TPS causes the timing to advance too far in this throttle zone?

I gotta get moving today, but I will post more later. Anyone with any ideas, please chime in!

Thanks,

MS07

I've been reading this thread, and I'm by far no expert like Doc, Gram, Musky and about 80% of the others here.

PINGING noice? Not a rattle?
Is it consistent with RPM?
Does it do it only while moving?
To be clear, it's ONLY once it warms up? Or does it do it before too?
It's ONLY 1/16 - 1/8 Throttle?
Does it sound like it's coming from the top of the motor or lower?
Gas additives and octane make no difference?
Changing oil to a thicker oil made no difference?

I'm just trying to get a true fix on what it is and when it happens and where it might be.

Lets start fresh with this and see if we can help.

Yes PINGING
Only while moving at cruise speed not under load
When hot only
1/16-1/8 YES
Top of motor
No additives. Ethenol or not does not matter
Amsoil 20-50 helps a little bit.

This is definitley heat related. Got caught in major rain storm yesterday and all went quiet. Rain cooled engin down pining goes away. I personally believ the culprit is predetonation caused by heat. If this is so we are doomed to living with it. I am not real concerned about it but it can be a tad annoying.

I think your assumption regarding timing has merit .... I would also check the TPS to see if it is set correctly.

If so, check the timing ... you can't adjust the timing so if it's out you need to check out the ignition system.

Doc

MidStar07 wrote:
Thought I'd bump this thread up and see if some wisdom can be gained.

In the last week I've ridden quite a bit and done a few things that seemed to help a little, but by no means did anything eliminate the racket. One, while riding through town with my wife I reached down and turned my PMS out about 1/2 turn (not sure where it's at exactly now, but not important), and I sorta kinda think it quieted the knock/ping a little. Tried a tank of MidGrade, which seems to have had no effect whatsoever. Change my oil to Mobil 1 V-Twin 20/50, and that seems to have had no effect whatsoever, either. (I was running Mobil 1 15/50 synth.)

Here's the thing: this noise is unlike any other noise I've dealt with in the past 40 years of riding motorcycles, because it ONLY happens between about 1/16th throttle and 1/8th throttle. This leads me to believe that it's not valve train noise, since that would be happening all the time. And it's not a case where lack of octane is causing the ping, since that would get progressively worse the more throttle you rolled in. This is the point that I'm not sure I've been able to make here to the knowledgeable guys like Doc, Musky, Gram, et al,: If I'm going up a hill at about 1/4 throttle in say, 3rd gear, the motor sounds awesome...no problem. It's at the top of that hill, when I roll the throttle back into the 1/16th - 1/8th zone that my motor gets LOUD again.

I tried explaining this last year, but I'm not sure if I ever made this point exactly, that I can be chugging or revving up a hill and all is wonderful until I roll the throttle back down into that "Zone."

What this also means to me is that no explanation to date is accurate. Yamaha says that the big engine parts need good oil to keep 'em quiet. OK, so why are they quiet under a good load? Doc, you've said that if the valves are noisy when it's hot, they need adjustment. But wouldn't they be loud at all throttle settings?

I'm wondering if perhaps the TPS causes the timing to advance too far in this throttle zone?

I gotta get moving today, but I will post more later. Anyone with any ideas, please chime in!

Thanks,

MS07

Sounds like it may be something to do with drive train noise. Transmission, transfer case, main drive. The reason I say this is because you say it only happens around 1/6 to 1/8 throttle and it happens at the top of a hill as an example. This would seem to indicate that it is torque related. Under higher torque loads, the noise is not there, but when you come over the top of a hill and roll the throttle back, your torque load decreases and you hear the noise. Think of it as gearing transitioning from positive torque (under load) to negative torque (under no load like coasting or very low throttle input). If there is any gear lash in the drive train anywhere, it may be creating this noise in that small margin area where the drive train transitions from positive torque to negative torque. Like in the area where the gearing is just kind of floating with each other, no coasting, no power load. Could be a transfer case chain slapping, excessive gear lash in the tranny, or something wrong with the final drive pulley or shaft bearings. In regard to the temp, this noise may not be apparent at lower temps because the oil is holding it's viscosity better. Higher temps will lower the viscosity of oil, some oils worse than others which could allow metal to metal contact between the gearing and result in the noise. I am reaching here, but something to consider.

EDIT: I just read your post stating it was in the top end, which makes my above lengthy paragraph useless. How is your rocker bushings?