Long post alert!
I've been wanting to figure out a way to carry luggage on the Duke for some time now, and the easiest options that did not involve any fabrication/workaround was to bungee a bag to the pillion seat. However, that would work only for short overnight/1-2 day rides and I would need something bigger for a proper tour.
So the other option was to strap on my Bullet-sized saddlebags on to her and see whether I could (1) make them fit and find a way to secure them, and (2) sit comfortably and ride with them over bad roads, potholes, bumps, as well as banking left and right in the twisties, without them moving around.
The advantage of the saddlebags also is that they have bottle holder pockets on either side into which I have fitted two 2.25 L "party pack" Pepsi bottles - which means I can carry around 4.5 L of extra fuel to supplement the meager capacity of the Duke's small 10.5 L tank.
Which means that with a touring mileage of even 30 kmpl (we got 34 on the Goa run), this should stretch the touring range between refuels to approximately 425-450 kms.
To put that further into perspective - possible to ride from Manali to Leh without refueling. I (and most Indian tourers) use this as the benchmark as there is probably no other stretch/circuit where we do not have any fuel pumps for that distance.
So I tried out different combinations – bottle behind and bottles in front, as well as different anchor points for the various straps and snap on buckles. I finally decided to go for the bottles in front position for the first trial run as having the bottles behind was looking like over some distance and with bumping and jostling, they would damage the bike’s cute little indicators (which really could have been positioned more rear-wards somewhere on the fiber mudguard so as to give more space for luggage).
Went for a short and fast 80 km ride to a nearby hillside with lots of rough bumpy approach roads and some really nice twisties and switchbacks, and found the bags shifting and re-positioning themselves very early into the run, sliding forward from the pillion seat to a lot more under my backside. I could feel them shift as well as feel the bottles against the heel of my left (gear) foot especially during shifts.
Took before and after photos to indicate the degree of shift. Nothing too dramatic – but maybe having the bottle behind would be better as they would anyways slide in front and so the indicators should not be in danger. Let’s see next time.
The pillion footrest pillars provide natural supports for the insides of the bags as well as a guard to prevent them from fouling with the wheel. However, as is evident from the photos, with this setup, having a pillion would be impossible as the footpegs are covered by the bags completely. Never ride with a pillion anyways – but just saying.
Besides the forward slide, the bags were nice and secure, and did not flap around or move even during some of the faster more leaned in corners. Even in city traffic, the clearance was ok and I could comfortably move through Pune traffic without snagging the bag on anything/anyone.
I must mention that I had stuffed the bags with tons of stuff, including lots of heavy tools, etc. so the bags were pretty heavy and close to touring weight (approximately 25 odd kilos estimated) and nowhere did the rear suspension bottom out or wallow around.
Another point I wanted to make in this post, though it is not necessarily related to the bags but more to do with long distance touring ergonomics. I did a ride to Panchgani over the Gudi Padwa holiday a couple of days ago, and I found my right leg and thigh getting uncomfortable and cramping up. This is due in part to my height (6’) as well as the funny small brake lever and the necessary and constant foot calisthenics needed to cover it. Nothing that cannot be lived with, but reinforces my earlier point about the levers (size and angle). Although to be fair, the gear lever I have gotten used to now pretty well to the point of instinctual shifts.
Bag position on bike with bottles behind
Bag position (before ride) on bike with bottles in front
Bag position (after ride - shift/slide forward) on bike with bottles in front
Top view of bags and seat (bottles behind) - less overflow of central flap on to rider seat
Bottles behind - rear view
Bottles behind - left view
Top view comparison of bottles behind and bottles in front
Top view comparison of bottles behind (first two) and bottles in front
Straps securing (to grab rails) - rear.
Note: These straps slid all the way forward along the length of the grab rail to come to rest at the point where the grab rails are bolted to the chassis. And along with the straps, the bags slid forward too. Need some way of anchoring the straps/bag there.
Straps securing (to trellis frame) - side
Note: These straps keep the bags tucked into the bike and prevent the bags from sliding backwards off the bike (as there is no backrest stopping that). But as it turns out (above), that is not the concern.
Forward shift of bags after ride - central flap mostly on to rider seat, and bags sloping downwards towards rider foot pegs.
Note how the straps anchored to the grab rails have slid unimpeded forward.