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Should I heli-coil all my cam bolts?

  • Thread starter Thread starter Paul.S
  • Start date Start date
P

Paul.S

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My gs1100 head had about 5 stripped holes that I just repaired with a heli coil kit. I used drill press to drill holes and so the inserts went in perfect. The rest of the holes are still in about 90% good condition but since the head is off the bike would it be good to just heli-coil them all? I have seen some companies selling brand new aluminum parts that all the holes allready have heli-coil in them. Trying to do a heli-coil on the bike is hard to do without going in crooked. Thanks
 
It makes sense to me -- whoever over-torqued the stripped holes likely over-torqued all of them. It's quite likely all the threads are damaged to some degree.

I'd see what the guys with more racing and tuning experience say.
 
Well I went ahead and heli-coiled all 24 cam bolt holes. Took a long time but it was pretty easy drilling the holes nice and square with my Dad's mill. It has a small crank knob that lowers the head very slow and you can watch the depth gauge so you get the perfect depth on every hole.20170804_201500.jpg
 
You should also buy all new cam bolts. I have had used ones stretch and twist off even using a calibrated torque wrench.
 
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