Chasing a vibration problem

[Blowtie316]

I tried backing the timing off to -4 with no change. It has about 80% 110 in it right now. I have tried main jets up to 350 and all it did was get real sluggish.

 

I installed the new tension rod bushings, no change.

 

At this point I'm convinced it must be normal for a 4mil.

 

Time for an anti vibe stem.

 

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[trickedcarbine]

^ hmm

[Blowtie316]

I was convinced by post 19 and 22 but people kept throwing out ideas. Laugh all you want.

 

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[blowit]

I run an indicator on every flywheel.  .006" TIR is a bit much but it is best to run them on a machined or turned surface.  Run on the face and OD of the flywheel.  Typically no more than .001" when things are dialed in right.  Check for burrs or irregular key position.  Can also remove key and clock flywheel different to see of it improves.  

[Blowtie316]

I run an indicator on every flywheel.  .006" TIR is a bit much but it is best to run them on a machined or turned surface.  Run on the face and OD of the flywheel.  Typically no more than .001" when things are dialed in right.  Check for burrs or irregular key position.  Can also remove key and clock flywheel different to see of it improves.  

 

When I ran it on the od, it was real tight like .001-.002 until it got close to the timing blocks then it would jump up a to .005-.006 depending on which block.  I did not try it on the face.