yamajim
Newbie
I just put the first 30 miles on and have a couple questions.
I hear a lot track sprocket noise. It is most noticable at speeds 15 to 30 mph. I think I had similar noise on my Venture 700 when it was new but it seeemd to fade away by 300 miles but I don't remember it being so intense. Track does not seen too tight or to loose based on deflection. The noise beats with the engine sound for a very loud whooom whoom that is almost painful. At 35+ mph it is just the sweet sound of the 4 stroke. Is this normal until the track / sprocket seat in or is it going to be there for the duration?
Second concern is hyfax wear between the skid curve and idler wheels.
30 miles and its down to 13 mm frrom original 25. Melted hyfax ion the clips too. Trail was slightly packed but temp was 36 degrees so mostly granular surface. Speeds close to 35 mph with a few spurts to 60 mph.
I this a normal early hyfax wear?
It feels a little top heavy, rides a bit hard, but carves very nicly and seems immune to darting. So far I'm lovin' this four stroker.
I hear a lot track sprocket noise. It is most noticable at speeds 15 to 30 mph. I think I had similar noise on my Venture 700 when it was new but it seeemd to fade away by 300 miles but I don't remember it being so intense. Track does not seen too tight or to loose based on deflection. The noise beats with the engine sound for a very loud whooom whoom that is almost painful. At 35+ mph it is just the sweet sound of the 4 stroke. Is this normal until the track / sprocket seat in or is it going to be there for the duration?
Second concern is hyfax wear between the skid curve and idler wheels.
30 miles and its down to 13 mm frrom original 25. Melted hyfax ion the clips too. Trail was slightly packed but temp was 36 degrees so mostly granular surface. Speeds close to 35 mph with a few spurts to 60 mph.
I this a normal early hyfax wear?
It feels a little top heavy, rides a bit hard, but carves very nicly and seems immune to darting. So far I'm lovin' this four stroker.
LazyBastard
TY 4 Stroke God
You've got something seriously wrong with the way your sled is set up. There should be no noise from the drive sprocket AT ALL, and you definitely shouldn't be burning sliders that fast. Possible that your track is WAY too tight? Lift back, push down on center of track with 25 pounds, should deflect 1 inch.
Snorover
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My hyfax burned in the first 50 miles and doesn't appear to have worn anymore sence then. I now have 5715 miles on with no appearent additional wear.
I do carry my track with about a 1" of space between track and slides.
Have allways carried track that loose as Yamaha specs are too tight.
As for the noise, do you think it could be the hyfax burning in. You would feel the hyfax sticking causing a slight jurking motion :?: Mine did.
I do carry my track with about a 1" of space between track and slides.
Have allways carried track that loose as Yamaha specs are too tight.
As for the noise, do you think it could be the hyfax burning in. You would feel the hyfax sticking causing a slight jurking motion :?: Mine did.
rxrider
Jan-Ove Pedersen
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Welcome onboard yamajim.
Beeing a silent sled (not much noise from under the hood) you will hear things you never heard from other sleds cause they are noisy. You will hear track rub against hyfax, skis running on snow etc. It sounds like your track is too tight or maybe out of alignment. It is common to let hyfax break in. It is done by running them on a surface offering little cooling until they are pretty warm (not melting) and then run into some soft snow letting hyfax cool down. It's a little like hardening iron. Hyfax gets harder and won't wear as much afterwards. I also run track pretty loose, just tight enough so it don't ratchet. Have ran tracks this on all my sleds. Hyfax on my old AC lasted 7500 miles and was not completely gone when I changed it. On my SX700R i never changed hyfax as long as I had it. It still had more than half left after 4000 miles. RX-1 has half left after 2500 miles and I don't think they will wear much more this season.
Later rxrider
Beeing a silent sled (not much noise from under the hood) you will hear things you never heard from other sleds cause they are noisy. You will hear track rub against hyfax, skis running on snow etc. It sounds like your track is too tight or maybe out of alignment. It is common to let hyfax break in. It is done by running them on a surface offering little cooling until they are pretty warm (not melting) and then run into some soft snow letting hyfax cool down. It's a little like hardening iron. Hyfax gets harder and won't wear as much afterwards. I also run track pretty loose, just tight enough so it don't ratchet. Have ran tracks this on all my sleds. Hyfax on my old AC lasted 7500 miles and was not completely gone when I changed it. On my SX700R i never changed hyfax as long as I had it. It still had more than half left after 4000 miles. RX-1 has half left after 2500 miles and I don't think they will wear much more this season.
Later rxrider
yamajim
Newbie
Thanks to all for the suggestions. Track deflection at 22 lbs is 1 3/8"
I might try bringing it up to 1" to see what effect on the noise.
I'll post results.
On the hyfax wear. I will ride a few more miles and watch. Since most wear/ melting is at the first 6" where it contacts the ground, can I back off mid shock preload. Will that degrade handling?
Thanks again.
I might try bringing it up to 1" to see what effect on the noise.
I'll post results.
On the hyfax wear. I will ride a few more miles and watch. Since most wear/ melting is at the first 6" where it contacts the ground, can I back off mid shock preload. Will that degrade handling?
Thanks again.
JDKRXW
TY 4 Stroke Junkie
Welcome Yamajim.
DON'T tighten the track if it's not ratcheting.
-If it's not ratcheting, I would loosen it a little.
- Make sure it's properly alligned.
It kind of sounds like you're driving in no snow/ low snow conditions..... or down iced over roads from your statement about melted plastic on the track clips. This will wear hi-fax immediately. Might this be the case?
DON'T tighten the track if it's not ratcheting.
-If it's not ratcheting, I would loosen it a little.
- Make sure it's properly alligned.
It kind of sounds like you're driving in no snow/ low snow conditions..... or down iced over roads from your statement about melted plastic on the track clips. This will wear hi-fax immediately. Might this be the case?
yamajim
Newbie
No roads or ice. Snow was packed but temp. 36F so granular and soft enough to leave a track print. Maybe not much snow getting up through track holes but I ran the Vmax hard the same day and no added wear or melt. Rx1 sliders definitly melted. even a little curl up the sides and plenty on the clips. Almost all concentrated in 5" forward of front idler. Seems like uneven weight distribution on the skid but not sure how to correct. Maybe increase the preload of front susp. and raise the nose Mid shock is at min preload already.
Snorover
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Loosen the track till it hangs about 1". The only wear that I get is at the front two wheels, now have 5700 miles and no wear sence break-in.
yamajim
Newbie
Still working on the noise problem. I have learned some things. The predominant sound is from the engine when it reaches a resonance, either mechanical like an aluminum panel or acoustic such as a resonant cavity. It occurs at around 4800 rpm or 160cps. Of course when there is resonance, the sound is 'amplified' .
I measured the spl (sound pressure level) with a calibrated meter and got 100db.
For reference, this is equivalent to:
Jet takeoff @ 500m, Train horn @ 30m, Diesel truck, jackhammer
It can damage hearing after 2 hours exposure per day.
Also the same frequency, 160cps, is produced by the drive sprocket at 23 mph. I observed the beat frequency as the two sound sources approach the same frequency. I eliminated some buzzing coming from the shroud vibrating against the lower panels. A little foam padding did the trick there. The noise from the sprocket is diminishing some as I put on miles.
100+ now. So this resonance remains to be dealt with. I can feel the tingle in my feet and hands and the rpms pass the resonant range. Aside from being uncomfortably loud, it detracts from the nice sound of the engine.
I'll keep working on it and post.
I measured the spl (sound pressure level) with a calibrated meter and got 100db.
For reference, this is equivalent to:
Jet takeoff @ 500m, Train horn @ 30m, Diesel truck, jackhammer
It can damage hearing after 2 hours exposure per day.
Also the same frequency, 160cps, is produced by the drive sprocket at 23 mph. I observed the beat frequency as the two sound sources approach the same frequency. I eliminated some buzzing coming from the shroud vibrating against the lower panels. A little foam padding did the trick there. The noise from the sprocket is diminishing some as I put on miles.
100+ now. So this resonance remains to be dealt with. I can feel the tingle in my feet and hands and the rpms pass the resonant range. Aside from being uncomfortably loud, it detracts from the nice sound of the engine.
I'll keep working on it and post.
whits-end
Pro
yamajim,
I'm definitely with you on this resonance thing.
You can hear the two frequencies come into phase with each other.
Don't know exactly what causes it, but I suspect no one else rides that slow long enough to hear it.
On a similar vein, I'm plagued with a popping back-fire noise at 5,000 RPM. No one else seems to have the problem. Replaced plugs, disconnected TORS, but it's still there. Seems to get worse with warm weather. Anyone have any ideas?
I'm definitely with you on this resonance thing.
You can hear the two frequencies come into phase with each other.
Don't know exactly what causes it, but I suspect no one else rides that slow long enough to hear it.
On a similar vein, I'm plagued with a popping back-fire noise at 5,000 RPM. No one else seems to have the problem. Replaced plugs, disconnected TORS, but it's still there. Seems to get worse with warm weather. Anyone have any ideas?
rxrider
Jan-Ove Pedersen
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Welcome onbord this site whits-end
You say popping sound gets worse with warmer weather. Warmer weather makes jetting richer. I have my needles lowered (leaned out) one position on the e-clip to take care of a rich condition I had with the stock setting. Popping sound in my sled was barely noteable, now it's virtually gone. When riding at 5000 rpms you are on the needle and needle jet circuitry so leaning it out may work in your sled as well.
You say popping sound gets worse with warmer weather. Warmer weather makes jetting richer. I have my needles lowered (leaned out) one position on the e-clip to take care of a rich condition I had with the stock setting. Popping sound in my sled was barely noteable, now it's virtually gone. When riding at 5000 rpms you are on the needle and needle jet circuitry so leaning it out may work in your sled as well.
whits-end
Pro
Thanks for the advice, rxrider.
I was thinking along those lines, but I don't even have a manual.
Totallyamaha specs say needles should be 3rd clip from top.
This sled was set at 4th.
What is stock, or where are most guys running them, with bone stock sled?
I was thinking along those lines, but I don't even have a manual.
Totallyamaha specs say needles should be 3rd clip from top.
This sled was set at 4th.
What is stock, or where are most guys running them, with bone stock sled?
LazyBastard
TY 4 Stroke God
There are 5 clips, stock is middle (third). If its on the 4th, then the needle is being held up higher, which will make it rich.
whits-end
Pro
Fixed my 5,000 RPM popping problem. Turns out it was a plugged pilot jet. The funny thing is, it started and idled fine. I guess it caused a lean spot at the transition of pilots jets to needle jets, resulting in a minor back-fire. The warm temp thing was just my imagination. Seems there have been a number of pilot related problems reported, so proper carb draining for off-season storage will be hi-priority this year. An ounce of prevention...right?
4Fighter
TY 4 Stroke God
Welcome Yamajim,
Did you check your belt? My RX1 sounded like a half track at 5-20 MPH once. I changed the belt, as it got flat spotted from trying to pull ultimatewarrior out of the slush :roll: and it went away.
Although it seems too simple of an explanation, you'd be surprised. The belt looked good, until I pulled it out. I had a 95 XLT that did the same thing and I could swear it was coming from the drive sprocket area.
Good luck.
Did you check your belt? My RX1 sounded like a half track at 5-20 MPH once. I changed the belt, as it got flat spotted from trying to pull ultimatewarrior out of the slush :roll: and it went away.
Although it seems too simple of an explanation, you'd be surprised. The belt looked good, until I pulled it out. I had a 95 XLT that did the same thing and I could swear it was coming from the drive sprocket area.
Good luck.
