First off, why do you say they NEED replacing? Just because of the manual's recommendations?

Secondly, the best way to figure out what size hose you need is to go measure. Isn't that what you always do when you need to know how big something is?

OK, there are head-scratchers and then there is this. I've had coolant hoses off for radiator removal on two different Wees ('07 and '0 and I have not encountered anything remotely resembling a "seal." In fact, I have never encountered a seal in or near a coolant hose on any type on any car, truck or motorcycle. What am I missing?

And only two bars? Both of my bikes have shown a steady three bars when running at highway speed in temps from freezing to stinking hot. It's hard to believe that there is so much variance in these mass-produced bikes.

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2007 DL650
"Who the hell wants to hear actors talk?" -- Harry M. Warner, Warner Brothers, 1927

It's not uncommon for Wees to drop to two bars in cold or cool and rainy weather. There are a number of variables including the thermostat, temp sensor and display that aren't exactly precision instruments.

There are no seals on the hose ends. The hoses just slip over the spigots and get clamped in place. A previous owner may have dumped radiator leak sealant in the coolant when tightening the clamps usually takes care of leaks.

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Pat- 2007 DL650A was ridden to all 48 contiguous states. 2012 DL650A is just getting started.
Nicknames for posting ease on my part, Vee = all DL1000s. Wee = 2004-2011 DL650s. Glee = 2012+ DL650s

Mike
The seal I referred to is Suzuki part 09280-18009 which they call an o-ring.The hoses from the thermostat to the motor (17853-19f00) are mounted to fittings which have a seal or o-ring between themselves and the motor.THere is only a hole in the motor otherwise. The fitting is attached via a single bolt.The attachment is weak and If the seal deteriorates it invites a leak.

Looking at the radiator hose section of the microfiche is worth a thousand words.
Also, for whatever reason the coolant bars lingered longer at 2 afterward, rather than thier typical three.Then again the fuel bars are also schewed.

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06 dl650

Suzuki part 09280-18009 is number 7. It seals part #6 to the engine. #6 is aluminum and referred to as a connector rather than a hose.

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Pat- 2007 DL650A was ridden to all 48 contiguous states. 2012 DL650A is just getting started.
Nicknames for posting ease on my part, Vee = all DL1000s. Wee = 2004-2011 DL650s. Glee = 2012+ DL650s