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Trying to find drill guide for cam caps 21 Mar 2024 21:26 #896729

  • sf4t7
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referman - I'm going to heli-coil some cam bearing cap holes on my Z1 and want to find the drill guide you showed in a post from May of 2022.  Tried to find www.eastcoastadditive.com but no luck.  Anybody know a way to find one?
Scotty

1974 Z1A
1015
welded Z1 crank
Andrews 1X Cams
Delkevic 4 into 1

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Trying to find drill guide for cam caps 22 Mar 2024 01:28 #896732

  • zed1015
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I know it's not answering you query but i've done hundreds of cam cap thread repairs and never needed a guide.
You just need a bench drill to ensure the holes are drilled square and then either use the chuck to start the tap straight or use a simple tapping block. 
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Trying to find drill guide for cam caps 22 Mar 2024 05:45 #896743

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Thanks Rob.  Not the first time overthinking a job starts to turn it into a project !  
Scotty

1974 Z1A
1015
welded Z1 crank
Andrews 1X Cams
Delkevic 4 into 1

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Trying to find drill guide for cam caps 23 Mar 2024 09:34 #896781

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Hi sf4t7, it looks like they are out of business and the last post on facebook was in 2022. The tool did make it easier but I've fixed may with out it.
1980 KZ1000 MKII
1075cc
Ported head
Mikuni Rs36
Cam Motion Z4
Falicon Crank

2022 Z900 RS 50TH Anniversary
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Trying to find drill guide for cam caps 23 Mar 2024 17:21 #896801

  • daveo
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Just a thought...could the cam cap potentially serve as a guide, while held in place with the other three bolts?

1982 KZ1100-A2

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Trying to find drill guide for cam caps 23 Mar 2024 17:26 #896803

  • SWest
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I've fixed many without drilling and with a 1/4" open end wrench. 
Steve
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Trying to find drill guide for cam caps 23 Mar 2024 18:01 #896804

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Just a thought...could the cam cap potentially serve as a guide, while held in place with the other three bolts?

Theoretically yes but there is a significant risk of removing material from the cap with the side of the drill bit which would render it scrap (the caps are matched to the head when line bored ) and possibly the whole head as a result unless you could find another cap which would fit without "nipping" the cam bearings or being too loose 
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Trying to find drill guide for cam caps 24 Mar 2024 04:29 #896818

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Could wrap something around the the drill bit to help center it and prevent that.
And blunt he cutting edge of the drill bit in that area if it helps.

Necessity is still invention's mother, and sometimes the best solutions are stupid-simple.
 
1982 KZ1100-A2

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Trying to find drill guide for cam caps 24 Mar 2024 09:55 #896839

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Random orphan caps are sold on evilly. Don’t use your matching one. Also one could install steel sleeves into the bore of the cap making it a nice jigs. Just my $.02
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1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
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Trying to find drill guide for cam caps 02 Apr 2024 09:02 #897163

  • Injected
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Keep the dowels in while drilling/tapping, they help to keep it somewhat straight. I have done plenty with the engine in the frame by hand, never had one that did not assemble after.
 
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