How does your oil look? I can hear the shudder in the transmission "whine".
Shudder when decel below 3,000 RPM
- Thread starter FZ648
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CanadianFZ6
Member
1500 rpm is basically idol, dude... This engine just isn't going to me very co-operative below 3000rpm... It is based on an R6 high performace engine... It needs to rev... You video confirms what I have said... Nothing seems out of the ordinary to me...
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jazzpaintball
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Reading through this, when you were stating shutter, I was thinking of a jerking bike ready to stall shutter. I have an 06 and it does the same thing. Granted I have not cleaned out the system, I just thought that this was normal due to the high compression our bikes have, and with it designed to run efficiently at 8-11k RPM.
I am going to watch this now, I am not concerned that there is something wrong with my bike, but I would like to make sure that if it is the start of something bad I can catch it early.
Waffles
I am going to watch this now, I am not concerned that there is something wrong with my bike, but I would like to make sure that if it is the start of something bad I can catch it early.
Waffles
Cali rider
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Is the chain very tight? Is the rear wheel straight? Sounds like a mechanical issue, especially when it disappears after pulling in the clutch.
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The engine / gear box sounds fine to me, there some whine (it sounds like the chain might need some cleaning / lube).
I don't hear any shudder and as mentioned previously. In a higher gear, pulling in the clutch at 2-3,000 RPM's is normal..
I wouldn't let it idle down to even 1,500 RPM's in 2nd or 3 gear. Your pretty much on the edge of bucking the engine, (not good), as there's not a lot of torque for the slow speed and higher gear..
On your tach, it doesn't display in the very low RPM's to the degree of the 07 and up as it pretty much stops (usable) at 2,000 RPM's.
Short of cleaning/lubing the chain, I believe your good to go and just pull the clutch in a little sooner, not a big deal...
As stated above, the bike likes to rev...
I don't hear any shudder and as mentioned previously. In a higher gear, pulling in the clutch at 2-3,000 RPM's is normal..
I wouldn't let it idle down to even 1,500 RPM's in 2nd or 3 gear. Your pretty much on the edge of bucking the engine, (not good), as there's not a lot of torque for the slow speed and higher gear..
On your tach, it doesn't display in the very low RPM's to the degree of the 07 and up as it pretty much stops (usable) at 2,000 RPM's.
Short of cleaning/lubing the chain, I believe your good to go and just pull the clutch in a little sooner, not a big deal...
As stated above, the bike likes to rev...
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FZ648
Junior Member
Appreciating everyones responses.
Sounds like I may have a normal bike. Oil is clean and topped up, chain is good.
It may not be evident in the video, but the bike does actually shake when it is making this sound as well.
Here is another similar vid, but the one on the previous page is better. VID 20120329 00006 - YouTube
Chain tension is within spec and wheel is straight.
Sounds like I may have a normal bike. Oil is clean and topped up, chain is good.
It may not be evident in the video, but the bike does actually shake when it is making this sound as well.
Here is another similar vid, but the one on the previous page is better. VID 20120329 00006 - YouTube
Chain tension is within spec and wheel is straight.
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jazzpaintball
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Yea, its still a little shaky, but still doesn't show enough that would concern me. Of course it is a video and I am not sitting on the bike, but I really do think you have no major issues.
When you rode dirt, what YZ did you have. I have a YZ400F that does the same thing, but it is not quite so noticeable due to the fact that I dont have smooth pavement to ride on with it, but I am sure that if you decelerated it to roughly 800 RPM (my guess to equivilent RPM to the FZ6) (also no tach on the YZ) that you would also have this stuttering due to the bike getting close to stalling.
When you rode dirt, what YZ did you have. I have a YZ400F that does the same thing, but it is not quite so noticeable due to the fact that I dont have smooth pavement to ride on with it, but I am sure that if you decelerated it to roughly 800 RPM (my guess to equivilent RPM to the FZ6) (also no tach on the YZ) that you would also have this stuttering due to the bike getting close to stalling.
CanadianFZ6
Member
If it shakes, check the steering head bearings for tightness... How is the front tire condition?
FZ648
Junior Member
I rode a 2-stroke YZ250 back about 10 years now.
Steering is all good. It definately comes from the drivetrain. Maybe it's just me not being used to this bike. I would love to try another FZ6 in Calgary, so I can compare.
I really appreciate the feedback guys. Thanks!
Steering is all good. It definately comes from the drivetrain. Maybe it's just me not being used to this bike. I would love to try another FZ6 in Calgary, so I can compare.
I really appreciate the feedback guys. Thanks!
jazzpaintball
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AHHHH
That is what it is.
You are basing your 4-stroke to your 2-stroke. Your compression ratio is A LOT different now. Most 250 2-strokes are around a 6 to 1 compression ration, where now you more than double that compression at 12.1 to 1.
This means that you are gonna have more resistance in the engine, thus you are noticing the engine starting to stall where your 2 stroke would not for a lot lower rpm.
Honest mistake, but you were comparing an orange to an apple.
REDHAWK22
aka willie
I had this problem last year & finally found out that my front tires were wearing out unevenly(Cupped). Replaced, shuddering gone on deceleration around 60mph
YZF73
Junior Member
I will have a go at replicating this when I next get out for a ride (hopefully tomorrow, weather permitting!), I would guess that it's normal, 3000 rpm is very low for engines like the one fitted to the FZ6, being a detuned R6 engine it is much happier in the mid to high rpm ranges
.Yamahaboyz
cotroler
Junior Member
hey,
I have the EXACT same problem, however this problem occurred when I changed to iridium plugs & k&n air filter. before i could cruise with 2000k rpm, so something is wrong!
I have the EXACT same problem, however this problem occurred when I changed to iridium plugs & k&n air filter. before i could cruise with 2000k rpm, so something is wrong!
ohgood
Junior Member
adjust your chain slack, and don't trying coasting so slow. the engine is fighting the slap of the chain that is changing from above to below the swingarm as the countershaft sprocket snaps about.
in other words: more throttle
cotroler
Junior Member
hi,
thanks for the reply. The chain is properly adjusted. Please note something seems to have gone wrong when I changed the plugs and/or air filter. I had to remove the airbox to do so. Could I have done something wrong in the process? I double checked and everything seems in place.. perhaps I missed something? Even when revving the engine on Neutral, the engine sound a bit different and something seems to be wrong.
thanks for the reply. The chain is properly adjusted. Please note something seems to have gone wrong when I changed the plugs and/or air filter. I had to remove the airbox to do so. Could I have done something wrong in the process? I double checked and everything seems in place.. perhaps I missed something? Even when revving the engine on Neutral, the engine sound a bit different and something seems to be wrong.
YZF73
Junior Member
I will have a go at replicating this when I next get out for a ride (hopefully tomorrow, weather permitting!), I would guess that it's normal, 3000 rpm is very low for engines like the one fitted to the FZ6, being a detuned R6 engine it is much happier in the mid to high rpm ranges
Yamahaboyz
Sorry it took me a while to get back, been way too busy lately
I had a go replicating this and found that my bike does indeed shudder under deceleration at very low revs (hard to say exactly where). As in my previous post, I believe this is normal, 3000 revs is very low, and is well away from the ranges in which the FZ6 produces most of its Power and Torque.
Yamahaboyz