Trying to find drill guide for cam caps

  • sf4t7
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Trying to find drill guide for cam caps

21 Mar 2024 21:26
#896729
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
Superbike bars
530 conversion

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Re: Trying to find drill guide for cam caps

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

22 Mar 2024 05:45
#896743
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
Superbike bars
530 conversion

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  • referman
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Re: Trying to find drill guide for cam caps

23 Mar 2024 09:34
#896781
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
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Mikuni Rs36
Cam Motion Z4
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Re: Trying to find drill guide for cam caps

23 Mar 2024 17:21
#896801
Just a thought...could the cam cap potentially serve as a guide, while held in place with the other three bolts?

[img
1982 KZ1100-A2

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Re: Trying to find drill guide for cam caps

23 Mar 2024 17:26
#896803
I've fixed many without drilling and with a 1/4" open end wrench. 
[img

Steve
Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229
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Re: Trying to find drill guide for cam caps

23 Mar 2024 18:01
#896804
daveo wrote:
Just a thought...could the cam cap potentially serve as a guide, while held in place with the other three bolts?

[img
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 
[img
1982 KZ1000 Ltd
www.kzrider.com/forum/11-projects/617631...-82-begins?start=192
kzrider.com/filebase-alias?view=download...d-fault-diagnosis&ca
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Re: Trying to find drill guide for cam caps

24 Mar 2024 04:29 - 24 Mar 2024 04:38
#896818
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
Last edit: 24 Mar 2024 04:38 by daveo.
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Re: Trying to find drill guide for cam caps

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

02 Apr 2024 09:02
#897163
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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