Triumph 750 rocker box gasket to suit six bolt applications from 1973-82.
Keep your classic Triumph 750 twin oil‑tight with this rocker box inspection cover gasket, correctly specified for TR7 Tiger and T140 Bonneville models produced between 1973 and 1982, using OEM part numbers 71-3673 and E13673.
Fitment and application
- This rocker box gasket fits Triumph 750 unit twins including TR7 Tiger and T140 Bonneville models in the 1973–82 production range that use the six‑bolt rocker box inspection cover design.
- It is intended for the rocker box inspection/tappet cap, providing a reliable seal around the inspection cover to help prevent oil leaks in the top end of your engine.
Features and benefits
- Correct replacement for OEM Triumph part numbers 71-3673 and E13673 for 750cc unit twin rocker box inspection covers.
- Precisely cut gasket profile for proper fit on TR7 Tiger and T140 Bonneville rocker boxes, helping maintain an oil‑tight seal during service and regular riding.
- Ideal for top‑end rebuilds, routine valve inspections, and leak repairs where the rocker inspection cover is removed and reinstalled.
Usage notes
- Always install this gasket on clean, flat rocker box and cover mating surfaces, removing old gasket material and sealant before fitment for best results.
- Check cover fasteners and threads, tighten evenly to the correct specification, and re‑inspect after initial heat cycles to ensure the gasket remains properly seated and oil‑tight on your Triumph 750 TR7 or T140 Bonneville
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