The Camhead boxer engine used in the R Nine T, like the earlier Hexhead, uses FOUR spark plugs. You totally missed the secondary plugs, on the bottom of each cylinder.
Hi and thanks in advance, I have an Urban Gs as well and it was over heat and the spark plugs push the plastic head cover out , Can I replace the spark plugs or it is a more serious problem! Thanks You again
Thanks for watching. Not sure, why the spark plugs get out, I am so sorry, but not sure how can I help you. You can go online and check some people forums. Sorry again