Finally got some miles this year. My 2010 Nytro 121 is making a whining noise. What is this?
Last year: http://www.youtube.com/watch?v=FhMSdUZLlQY
This year: http://www.youtube.com/watch?v=tMAG7o-RoBc
Last year: http://www.youtube.com/watch?v=FhMSdUZLlQY
This year: http://www.youtube.com/watch?v=tMAG7o-RoBc
wcfpusher
Pro
something sounds dry bro...try loosening the track and checking all bearings...shaft ones too...chaincase oil...etc
Dano
TY 4 Stroke Master
Did you do something in your chaincase? Chain to tight?
Dan
Dan
Sled has 1600 miles on it and has not been beat at all. Chaincase oil has maybe 700 miles on it or so. The sled had a base service done on it a few weeks ago. Would have done a full service but it had one late last winter.
kviper
VIP Member
Chain is to tight!
yamahinn03
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kviper said:
X2 on the chain being to tight
00-NUKE
Expert
Reply
X-4 on the chain
X-4 on the chain
Alatalo
TY 4 Stroke Master
And X5 on the chain.
My experience is that the FX Nytro is very sensitive to chain tension and the slightest bit too much will cause a whining noise that will be heard at all speeds. The Yamaha manual tells you to do the chain tension "full finger tight and then back off 1/4 turn". If I follow this recommendation I get the whining noise, for sure. I noticed this already after the first service on my -08 RTX 40th. Ever since I have done "full finger tight and then back of 1/2 turn". Enough chain tension and no noise.
My experience is that the FX Nytro is very sensitive to chain tension and the slightest bit too much will cause a whining noise that will be heard at all speeds. The Yamaha manual tells you to do the chain tension "full finger tight and then back off 1/4 turn". If I follow this recommendation I get the whining noise, for sure. I noticed this already after the first service on my -08 RTX 40th. Ever since I have done "full finger tight and then back of 1/2 turn". Enough chain tension and no noise.
theCATman
TY 4 Stroke Master
Chain..... is there an echo in here? 
A friend of mine has an '09 XTX & his chain was too tight right from the factory & screamed like a banshee, until we loosened it to a spec similar to what Alatalo posted above.
A friend of mine has an '09 XTX & his chain was too tight right from the factory & screamed like a banshee, until we loosened it to a spec similar to what Alatalo posted above.
When you say full finger tight do u mean give it a good tight turn with fingers then back it off? or snug it with your fingers? i have always just done finger tight and left it alone and never had an issue on my 08. new sled this yr and you guys are making me a little worried. should i tighten it good with my fingers then back it off 1/4-1/2 turn?
berge75
Expert
Turn it in with your fingers, till it stops, then I aways give it a 1/4 turn back out before tightening the locknut.
thetruck454
TY 4 Stroke Junkie
I went as tight as my bare fingers could go, then I went 1/4 back. Maybe I went too tight. It was hard to turn where as my brothers attak was easy to turn.
sorenson1610
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LOL yup I'm hearing the echo too. x 100 on the chain. Mine was too tight on my 08 and i had to back it off. It still makes the noise a little, maybe I should loosen it more? Does it hurt if is still winds some??
stopdropanroll
TY 4 Stroke Master
thetruck454 said:
The reason it turns tight is the rubber washer, spin it back when adjusting the tension, it will turn easy then.
