In some cases where one is not able to, or does not desire to, replace their Gurtner AR series carburettor, the following is a procedure which will allow one to use common Dellorto 5mm jets in a Gurtner carburettor. This procedure is offered as a proposed repair and has not yet been tested for road worthiness, so procede at your own risk.
1. flat blade screw driver. 2. vice 3. drill, preferably, drill press. 4. 11/64 drill bit 5. 23/64 drill bit 6. 1/8 NTP (#27) Tap 7. 5mm Tap 8. hack saw 9. file or sand paper 10.pliers
4. Cut the threaded portion off of the jet File:Cut-jet.JPG
5. Smooth rough edges with file or sand paper
10. Clean all parts of metal shavings!
11b. If you so choose, you can damage the OUTER threads of the Gurtner jet (now an adapter) so that it will stay in the carb body once installed, this will make changing jets easier. Here is the adapter "locked" in to the body.