Royal Enfield Himalayan Tappet tool

prusaprinters

I had bought an after-market tappet tool only to be annoyed that when I came to use that tool the 3mm fitting was so slack making adjustment more difficult than it needed to be and the 10mm wrench was so tight it was completely useless not fitting a 10mm nut. In the situation I knocked this up to do the job.OBVIOUSLY IT IS PLASTIC SO CAN ONLY BE USED TO ADJUST AND FINGER TIGHTEN AFTER SLACKENING WITH SOCKET OR SPANNER AND BEFORE TIGHTENING WITH SOCKET OR SPANNER.DON'T USE ON HOT ENGINE.USE AT OWN RISK. The tappets to be adjusted with this tool should be adjusted cold. The 3mm square tool has distinct markings atop to aid in gauging how much is is being turned. It should be possible to leave this on the 3mm square head when tightening with a spanner. Don't hold and tighten against it with a wrench other than holding very gently, it's plastic, but should be possible to easy see if it turns and by how much (it probably wont turn) and gauge by that when using this tool. Believe thread pitch is 1mm so do sums. If suspect exhaust valve has became worn/indented by tappet making feeler gauge measurement inaccurate then square head may be turned to touch then backed off just under ¼ turn then measured as thread pitch is as I understand 1mm.  There's even an arm part C that is optional to accurately measure any degrees of turn on final tightening although I in end I didn't bother to print that off even though I designed it.I was able to set tappets with this tool and a 10mm spanner adjusting towards the slacker end of tolerance and rechecking after final tightening with feeler gauge.You may get by only with the 3mm tool and a spanner. Example screw with square head provided for demonstration only.Look else where to confirm tappet settings and procedure for setting tappets. Information is easily found.I believe the thread pitch of the square head screw is 1mm.  Settings quoted as inlet 0.08-0.010 & exhaust 0.20 - 0.23 but although unlikely recommendations can change. Please check independently. Printing. Recommend PETG with plenty infill.You may print both parts together but will probably need brim and may prefer printing parts separately.