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July 27th, 2016, 07:43 AM   #1
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Lightening the 570?

Im thinking of lightening the 570 70-degree bike.
It is currently pretty much a stock race bike with no lights on it, it only needs a few litres of fuel to do the racing Im into, any easy/reasonable ideas guys?
Not looking to go crazy here but if someone has ideas or have weighed parts, yeah you get what Im after, Id be most thankful!

Last edited by TomTom; July 27th, 2016 at 07:46 AM.
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July 27th, 2016, 02:57 PM   #2
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I been thinking the same, but it's not easy unless you go mental and pay money for titanium and carbon parts... The easiest is to buy a lithium battery and to not top up the tank. Maybe it's possible to build a more simple subframe of alu-rods?
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July 28th, 2016, 02:23 PM   #3
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Most modern bikes are pretty light. To lose any appreciable amount of weight would take tons of money. Battery, eliminate lights if not needed is the first thing i think of. Wheels and hubs can save a decent amount of unsuspened weight. Lightweight suspension component, but very expensive. Used to be able to get carbeb fiber plastic parts, again big money.
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July 28th, 2016, 03:32 PM   #4
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The fuel tank is pretty complex right? As in a lot of surface area to volume?

LiFePO4 batteries are cool.

Lighter seat pan and foam? Have heard something about that.

Cut down the plastics for a few hundred grams?
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July 29th, 2016, 04:14 AM   #5
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Remove the starter engine and use a very small battery for the ecu. Then build a paddock starter roller
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July 29th, 2016, 06:19 AM   #6
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I think the subframe could be lighter but will take a lot of time and a handy welder/mechanic to build something nice that works, if you can do it yourself maybe not that expensive and save maybe one or 2 kg the battery I changed to lithium and saved over a kg but some have problems with lithium battery in colder conditions
Some tyres are also lighter/heavyr than others also cheap way of saving weight.

Expensive ways to save weight change as many bolts/nuts/axles etc for titanium lightweight suspension (air schock)
Lighter tubeless wheels carbon fiber etc...
The 570 just is NOT a light bike the engine ways over 3kg more than the "old" 627 engine and it's build more complex because of the 70 design and fuel injection
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July 30th, 2016, 01:11 AM   #7
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Thanks for the ideas gentlemen! Think Ill have to improve my riding skills instead, dont you hate when that happens

I cant change wheels or tires unfortunately as you need spoked wheels and tires are just one classified kind.
Funny how deceiving brain is, on my scale the Berg is 3kg heavier than the KTM, feels like a lot more.
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July 30th, 2016, 12:53 PM   #8
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Is the 450ktm a more narrow bike between the legs? the 570 is still pretty wide for a "dirtbike" compared to a berg 650 it is smaller (wider tank on 650) but compared to crf 450 the berg feels a bit fat.
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July 31st, 2016, 09:02 AM   #9
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Originally Posted by HusaBELGfs570 View Post
Is the 450ktm a more narrow bike between the legs? the 570 is still pretty wide for a "dirtbike" compared to a berg 650 it is smaller (wider tank on 650) but compared to crf 450 the berg feels a bit fat.
Oh, I have no idea really, its when pushing the bikes around in the garage the berg feels heavier, once riding I cant feel any difference.
The KTM is easier to get on top of the tank when going round a tree at trails riding as the seat is more straight and tank is lower and the Berg is better suited for the ice riding as its really neutral and stable sliding and no need to climb up the front end of the seat. So Im happy with what the bikes do for each type of riding.

For the coming season I wanted to make sure the bike works, and it does, so I ripped it apart and dynoed it again to the same power is there. tried the stacks and NO upside, lucky my friends did them
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Last edited by TomTom; July 31st, 2016 at 12:15 PM.
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August 1st, 2016, 09:14 AM   #10
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Random thoughts:

Tubeless? Tubliss or tape+silicone?

Lighter rims - there is a difference. Lightweight rimlocks, if you use them.

Titanium springs? Idk.

Stiffer suspension in springs or valving. Makes it feel lighter because it's wallowing less.

And - Is the stock muffler heavy?

Last edited by tourist; August 1st, 2016 at 09:18 AM.
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