Technical Engine upgrades?

[ryan1428]

What are my Engine upgrade options. Found lots of videos on youtube but no info.

 

[gadge]

What engine are you running? Air cooled 650 or water cooled 704? If you have the air cooled one then your laughing as there's loads of bits - carbs, bigger heads, sports cams the lot! Not so great if you have the water cooled BIS though