Hello does anyone know the type of bolts used to fix the engine in. I just tied to fit the engine and i dont think the threads are metric any ideas??

The threads are most likely to be metric fine.

yes just been down the local bike shop ordered the bits metric with 1,25 pitch.

Most engines by now have had the original fine thread stripped, replaced with a coarse helicoil.

Other silly megatorque spanner activities are to put a bolt (the long one) through the two joined crankcase lugs and tighten until the lugs break off the casing. That needs welding, a good improvement if it gets to that stage is to add a reinforcing tube between the lugs... thankfully the material on the upper and lower cases is better than that on the sump.