Cam Backlash Gear Without Pin/Tools - Page 2 - Triumph Forum: Triumph Rat Motorcycle Forums
Air Cooled Twins Talk Discussion of Hinckley Triumph Twin related matters and topics.

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post #11 of 16 (permalink) Old 08-21-2017, 09:58 AM
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I have 6 in my basement. A bit far to travel I suppose.
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post #12 of 16 (permalink) Old 08-21-2017, 09:23 PM Thread Starter
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I have 6 in my basement. A bit far to travel I suppose.
Just a little! Would make for an interesting ride tho! :P
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post #13 of 16 (permalink) Old 06-05-2019, 03:54 AM
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I bought a 6mm aluminium rod, cut it to size, put it in a drill, drill in wise, then used a dremel tool to turn down to the correct diameter. Then I bent it as per the oem tool. Worked perfectly, no small parts to drop, and total cost of 3.
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post #14 of 16 (permalink) Old 06-05-2019, 04:47 PM
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I found a bolt that fit the big hole, then cut off the threaded portion and the head. Chucked the resulting rod in my drill press and used a file to reduce the diameter at one end to fit the small hole. Drilled a hole through the other end and attached a safety wire to prevent dropping it into the engine. Took only a few minutes to complete the whole project.
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post #15 of 16 (permalink) Old 06-05-2019, 06:38 PM
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Zap straps won't hold everything in alignment. The anti-backlash spring is quite strong and will easily tear them. I tried it and wound up using a 1/8" steel pin punch to pry the two gearwheels into alignment while fitting the camshafts. It's tricky but can be done. I like the idea of a small screw or other piece of hardware to keep them aligned.
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post #16 of 16 (permalink) Old 06-05-2019, 07:13 PM
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I can vouch for the tension between the anti-backlash spring and the cam gear. The first time I had to change valve shims I used the screw and nut approach, but with one that was much too small. The spring pushed back and the screw was at about a 45 degree angle due to the pressure. I thought it would be a good idea to pry on the gear with a screwdriver to bring it back into alignment. This while holding the cam in my left hand. Of course, the screwdriver slipped, causing the screwdriver to spear my hand, passing all the way through and out the other side. I pulled the screwdriver out and tried to stop the bleeding with my cleanest dirty shop towel, noticed blood continuing to accumulate on the floor, and realized what happened. Fortunately, it missed the bones and major blood vessels. Just a reminder to be careful, especially if you aren't sure what you are doing.
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