#18 in Powersports drive train parts
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Reddit mentions of Sunstar 42116 Countershaft Sprocket

Sentiment score: 1
Reddit mentions: 1

We found 1 Reddit mentions of Sunstar 42116 Countershaft Sprocket. Here are the top ones.

Sunstar 42116 Countershaft Sprocket
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Case hardened, chromoly steel constructionParkerized surface treatment for rust and corrosion resistanceGreat OEM quality at a non-OEM price
Specs:
Colorblack
Height1 Inches
Length5 Inches
Number of items1
Release dateApril 2012
Size16t
Weight0.55 Pounds
Width1 Inches
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Found 1 comment on Sunstar 42116 Countershaft Sprocket:

u/ParticleSpinClass ยท 1 pointr/motorcycles

Hello!

I've got a 2012 FZ8, and I just replaced the chain and both sprockets. Here's what I used:

  • DID 525VXGB X-Ring Chain
  • Sunstar 42116 Countershaft Sprocket
  • Sunstar 2-459546 Rear Sprocket

    The problem: Pretty much any time I'm moving, I get a pretty loud whirring/buzzing/whining sound coming from the area of the front sprocket. I'm 98% it's the chain itself, at the moment it rotates around the front sprocket. Here's the facts:

  • Increases in pitch as speed increases (though 35-45mph seems to increase sharply)
  • Increases amplitude as load increases (e.g. it's much louder at 3/4 throttle than at 1/8th throttle)
  • I might have those mixed up (my memory sucks)
  • Only appears under positive load (cruise/acceleration)
  • Almost completely disappears under negative load (deceleration)
  • Still occurs with the clutch in and coasting, but not as loud
  • Stock sprocket has a rubber insert, new sprocket does not (I imagine this could have something to do with it)

    I've adjusted the chain to spec and aligned the sprockets the best I could. When I installed the chain, I cleaned off the grease that came with it with kerosene, let it dry, and went for a test ride. I've since (after the test ride to warm up the chain) applied chain lube and haven't ridden it since. This is the first time I've changed a chain on a bike before. Is this sound normal? Does it go away? It's not terribly annoying, since my leg blocks 90% of the noise (I only hear it when I move my head to the side, or open up my legs), but I just want to make sure I didn't do anything wrong. I torqued all nuts to spec on both sprockets and the axle. I've put the front sprocket cover back on (I had it off during the test ride), so I imagine that it will muffle the sound a bit. I also normally ride with earplugs so that will help too.

    Here's a video that shows the sound. I only get up to aboue 25-30mph, but you can still hear it. Notice that once I cut the throttle, the sound disappears. And keep in mind that it's a lot louder than the video makes it seem.

    Thanks!