The issue with a 916 tank is that it doesn't just drop over the standard DD bike airbox without modification. I plan on loosing the standard airbox and with the use of a 916 airbox and tank create a plenum chamber for the throttle body trumpets to sit in

great idea re weighing them. Be good to see the difference, may make my mind up re using the tank I have or spending money (which I hate ;) ) having one made

I'll try and get them weighed this weekend
Just got back from Kev P's work place where the SS tank was delivered to,
So that will be at least 3 tanks I will be weighing and possibly 6 as I really should weigh the ultra heavy 620 Monster Plastic tank and then I may as well weigh my 955 tanks

So that will be weights of Tank including Pump but no filler Cap for the following

916 - Steel
955- 24L Alloy
955 - 17L Carbon
600SS - Steel
600SS - Alloy
M620 - Plastic

Skids, if it helps, I weighed my M600 tanks with digital luggage scales when i did the swap. With fittings (mounts etc), fuel filter, filler cap, and overflow pipes, but minus pumps (external on my Monster), i got the following:

Steel Carby Monster tank was 7.1kg
Ally 851 Corsa tank was 4.75kg.

Filler caps are around 150-200g, so only make small difference.

A few results from this morning weigh in

916 - Steel + 916 Pump = 5.1kg
955- 24L Alloy + 916 Pump = 4.0kg
955 - 17L Carbon + 916 Pump = 3.7kg
600SS - Steel + 600SS Pump = 6.4kg
600SS - Alloy + 600SS Pump = 3.3kg
600SS - Alloy + 999 Pump = 4.2kg
750 Sport - Steel + 600SS Pump = 5.4kg


In order with heaviest first and with Rons info added

M600 - Steel (No pump) 7.1kg inc filler cap
600SS - Steel + 600SS Pump = 6.4kg
750 Sport - Steel + 600SS Pump = 5.4kg
916 - Steel + 916 Pump = 5.1kg
Alloy 851 Corsa (No pump) = 4.75kg inc filler cap
600SS - Alloy + 999 Pump = 4.2kg
955- 24L Alloy + 916 Pump = 4.0kg
955 - 17L Carbon + 916 Pump = 3.7kg
600SS - Alloy + 600SS Pump = 3.3kg

A 916 pump complete weighs 1.2kg
A 600SS pump on its own weighs 0.25kg

thats brill, thx Kev/Ron.

and to be clear, the SS carby pump wont be enough for a 620 Monster

Nope, it doesn't deliver enough pressure.
The standard 620/750/900SSie pump fits in the tank, but has a different electrical connection

And we have a new second place in the heavy tank league
So dumping the plastic Tank off my M620 and going with a 916 tank I will save about 1.8kg as well as getting the ergonomics I want

M600 - Steel (No pump) 7.1kg inc filler cap
M620 - Plastic Tank + Pump = 6.9kg
600SS - Steel + 600SS Pump = 6.4kg
750 Sport - Steel + 600SS Pump = 5.4kg
916 - Steel + 916 Pump = 5.1kg
Alloy 851 Corsa (No pump) = 4.75kg inc filler cap
600SS - Alloy + 999 Pump = 4.2kg
955- 24L Alloy + 916 Pump = 4.0kg
955 - 17L Carbon + 916 Pump = 3.7kg
600SS - Alloy + 600SS Pump = 3.3kg

Well done Kev, great work. It makes it esier for everyone to chooose.:D

More choice if you have a monster, bit more limited if you have a SS

But just looking at OEM Tanks to fit a Monster 620

Lightest is the 916 style tank followed by the SS tank and then the two types of Monster tank.
Still doesn't seem to slow Brummy Dave down as my understanding is that he's using a plastic S2R tank on his Class B Monster with the pump hole plated up

Doing nowt to mine, other than maybe sellimg it