Svartpilen Weight Reduction Project

Regarding the collector box, the only easy way (meaning with off the shelf parts) to eliminate it is going with a cat-delete pipe? I'm interested in eliminating it is for the weight reduction, but I'm happy with the way my bike sounds right now (LeoVince slip on). Also, I would prefer to avoid having to mess with the ECU / mapping.... reliability to me is more important than adding 0.3 HP ;)
 
The werkes chamber delete removes only the black box and not the cat.

Weight reduction is noticeable, power curve feels different, max power is probably the same.

Normally no ecu work is required if you leave the cat and air box lid installed.

The chamber delete does change the sound a lot.
 
BISavage said:
The werkes chamber delete removes only the black box and not the cat.

Weight reduction is noticeable, power curve feels different, max power is probably the same.

Normally no ecu work is required if you leave the cat and air box lid installed.

The chamber delete does change the sound a lot.
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Thanks! Good to know about that option. I already have the LeoVince sleeve and really like the sound of the bike. I would not mind a change in sound, but I dont want an obnoxious sounding bike. Let me check if there are any sound clips on Youtube.
 
BISavage said:
Well, yes, in fact it does exactly that.
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I actually like that :)

My friend has a KTM SMC R 690 with an aftermarket muffler, without baffles. Under normal driving conditions it sounds really nice, only goes "BRAAP" in WOT. I dig it.
 
I've been thinking about weight reduction, and about the impact each part has in the performance of the bike (Mostly in acceleration). I'm making a basic excel spreadsheet to calculate this impact, but I would need the weight of the components of the bike. Mostly the spinning bits (Wheel assembly, brake discs and sprockets).

I don't currently own a bike lift, so I can't remove the wheels to weight them. Do you know its weight?

Here's a preview of the calculations. Nothing fancy, just basic stuff.
Captura.JPG

It's still not quite there yet, but I need to sleep now 😅
 
Projekt Racing said:
Our bike is currently 280 pounds on the scales!
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Thats just crayzay!

I measured 140kg ready to ride.
Thats like 30lbs more, granted I have tools and passenger pegs and a windshield; really though... thats not 30 lbs... maybe I should check the calibration of my scales.

Anyways, I was pondering the wheels thing and I wonder... even though the alloys weigh more, is the added mass is more towards the middle (no tube for instance) so that they would accel / decel faster, or is it the otherway round?
 
For anyone interested,
MotoMaster Front for Aluminum Wheel
- 1306g

Thats only 50g more than the disc for the spoked wheel.

Makes the difference between spoke and aluminum 200g vs. 400g with stock brakes.
 
Vanessa said:
My SP401 is fitted with an "Anti-Gravity" brand lithium battery. It's the small size version rather than the sames-as-stock size version. The small size one is a bit lighter, and doesn't come with the charge protection and testing circuitry features that the sames-as-stock size one does. But it was a bit cheaper, though still very expensive. I bought it at a bike show from the UK importer of Anti-Gravity batteries, and they had a show price deal. I wanted the smaller size battery to free up some space inside the bike, so I could fit 'other' things. Plus the weight saving of course.
I ride the bike all year round, and even on the coldest days (zero deg C) and even if the bike has sat outside and not been started for weeks, it still fires right up no problem. But like @nampus I too 'warm' the battery up on the coldest days by turning on the lights and heated grips for a min or two before cranking. It's no hardship, I put the lights etc.. on before I wheel it out, and before I lock the gates and put on my gloves. By then it's ready to start.
Hubby and I have bikes with different types of batteries in them, from Lithium, AGM/GEL, and standard Lead-acid. Optimate and Battery Tender make chargers that can cope with all these different battery types, in one charger, including the CAN-compatible type for charging BMW GS bikes through the power socket/port. So we invested in one decent quality battery charger that can charge all types. If I haven't ridden a bike for a couple of weeks, I'll put the charger on it for a day or two, just to top it up. But I NEVER leave a charger connected for days or weeks at a time. So far, we've had no battery issues at all, on 9 different bikes over the years.
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Is this the 401 you have, for our 401's?

antigravitybatteries.com

AG-401 Small Case Lithium Battery

AG-401 is the smallest lightest Antigravity Battery, and the most compact Lithium motorsport battery available. Ideal for race and performance applications.
antigravitybatteries.com antigravitybatteries.com
 
Lozion said:
Is this the 401 you have, for our 401's?

antigravitybatteries.com

AG-401 Small Case Lithium Battery

AG-401 is the smallest lightest Antigravity Battery, and the most compact Lithium motorsport battery available. Ideal for race and performance applications.
antigravitybatteries.com antigravitybatteries.com
Click to expand...
To use a tiny battery you have to find a way to make it fit well without rattling. That's why I prefer the Shorai for my street bikes.
 
Also, some more weight info. If you have a Vit you don't need the engine protector and it isn't light, 1370g. Stock mirrors are 790g and I replace them with aluminum bar ends that weigh 235g, so that is 1.2 pounds right there.
 
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