Some great tips there thanks for that. Could you recommend places to stay ? Sounds like a good idea to go west from Dublin to Sligo area ,then south from there .
The Beach Bar I mentioned before is a good spot. Great food and decent Guinness readily available. Another place I have used a as base to tour the west is the Foxford Lodge
http://www.thefoxfordlodge.ie/ B&B in a town called Foxford in Connaught. Can't recommend this place enough. We've stayed here four times now and I would go back again. Make sure to tell Harry and Brigid, the owners I said hi. Foxford is a nice small village with some old style tiny pubs.
Western Hotel
http://westernhotelgalway.ie/ is where we stayed in Galway. Really central, good secure underground parking and the room are decent too. Make sure to book early as Galway is a popular spot.
We stayed in Castle Lodge guesthouse
http://castlelodgekillarney.ie/ in Killarney. Again, off street parking behind a big locked gate for the bikes (just ask for it). Rooms were decent, brekkie was great and its only a few minutes walk into the town centre. Lovely craft brewery spot just down the road is worth a visit (or three
) -
https://www.killarneybrewing.com/. Again, Killarney is very popular so book early if you plan to overnight there...
Riding through Co Clare make sure to take in the burren - its an amazing place with a lunar type landscape of limestone. And there are a few hidden gems along the way like Fr. Ted's house and a chocolate factory/café. I can send on a route to you if you want...
Around Killarney there are several places well worth visiting - make sure to check out Kate Kearney's Cottage and the Gap of Dunloe - breathtaking scenery. That leads onto Molls Gap and the Ring of Kerry. ROK can be a busy road but it's worth riding it if you have time. Check out both the Conor Pass and the Healy Pass - both great roads.