I've occasionally seen posts on here asking about the weight of a CBR400 but have never seen a number.

Today I used the trusty bathroom scales and piece of wood the same thickness under the wheels to check mine. The scales are about 300g heavier than my doctor's and about 100 g heavier than the scales at my local hospital (guess how I know that?) so they should be pretty close.

The bike is race bike and all the road gubbins, except the speedo cluster and extraneous loom bits are still there. It has Magtek rims front and rear, HRC headers with a Dan Moto titanium can, alloy front and rear sub frames, rearsets and a 10.5 litre allot tank with a Tyga fibreglass cover. It also has a pretty good smattering of aluminium Pro Bolt bolts in non stressed areas and a lithium battery. It has a custom radiator about twice the normal size, so that plus the coolant would add some weight.

The weight over the front is 85.6kg and the rear 75.2kg with a full 10.5 litres of fuel. So fully fuelled ready to race it is 160.8kg with a weight bias of 53.2% front and 46.8 % rear.

With fuel weighing .711kg/litre that means that the bike with all fluids except fuel weighs 152.8kg.

I was aiming at 150kg so I am almost there. I think with the Koso dash, cleaning up the wiring loom and a few lightening mods in the engine I might just make it.

Matt

I see a Rocky cut scene training moment coming on... Adrianne....

Some say.. standard weight is 165 dry and 185 wet, all we know its bloody heavy if you got to pick it up.

Some say.. standard weight is 165 dry and 185 wet, all we know its bloody heavy if you got to pick it up.

Or have to push it back to the pits if you run out of fuel....

I think Graeme France can get below 150kg.

I'm interested to learn a bit more about your alloy tank and cover, please can you put some details up?

Are you running total loss and are you running a lighter chain / sprockets?

vr46 wrote:I think Graeme France can get below 150kg.

I'm interested to learn a bit more about your alloy tank and cover, please can you put some details up?

Are you running total loss and are you running a lighter chain / sprockets?

The tank details are all in my old build thread viewtopic.php?f=69&t=35933

The tank was horribly expensive and made from 3mm allot. If I was to it again I'd use 2mm alloy. The cover is from Tyga and I made up some mounts for it and fibreglass end them in.

I'm not running total loss as I've not been into the engine yet, but don't expect I will.

Am running a lightweight race chain, drilled Renthal front and Tyga alloy rear sprocket