Wow, has some one stuck some thing un comfortable up yer arse? lol
Your will find that just putting straight through pipes on aint that simple, you will also need to up jet the carbs and all sorts which takes many a day and temper tantrums. Take a look at my Bobber project (link in my sig) what may give you some helpful tips or just a tea break read or even a laugh depending your mood
Good going so far tho dude, but unless your just a Harley Davidson wanabie and not going to ride unless there is more than 100% clear sky id put a rear mud guard on, front don't matter much except for MOTs but a rear is a must.
Also get rid of those pissing indicators! i have no idea what the Yammy designer was thinking (or smoking) when he / she put them on that bike!