Posts
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11/26/2014
Location
Zurich
CH
luckynino
3/1/2018 4:17am
3/1/2018 4:17am
Edited Date/Time
3/29/2018 6:26pm
My friend got his brandnew CRF 250 '18 a few weeks ago and after we verified it's weight (overweight) we started looking for ways to get her lighter...the stock dual exhaust was one of the items we checked and it indeed weighs a hefty 4700g / 10,7 lbs
We then took those heatshields off as well as the resonance chamber (Yoshi & PC come without it as well)...this alone was worth over half a kilo (511g = 1,1 lbs)
This way the stock exhaust weighed 4200g = 9,25 lbs
Modified and slimmed stock exhaust:
Now my friend obviously still wasn't happy and while hoping to improve the lackluster power he hoped for a nice weight loss when ordering a full Titanium exhaust system...so he just got his new Pro Circuit exhaust system for his CRF 250 2018
TI-6 PRO DUAL CARBON TI-SYSTEM, CRF250R '2018
He really hoped to shed some weight to help the overweight CRF regain some ground...well - NOT SO!
The Pro Circuit Ti system is still quite heavy: 4100g = 9,04 lbs (so just 100g lighter than the modified stocker )
No review on how it performs as we have super-low temperatures and snow over here in Switzerland. But the weight loss was really minimal at best and a big disappointment! Lets hope it rocks the house at least powerwise...
We then took those heatshields off as well as the resonance chamber (Yoshi & PC come without it as well)...this alone was worth over half a kilo (511g = 1,1 lbs)
This way the stock exhaust weighed 4200g = 9,25 lbs
Modified and slimmed stock exhaust:
Now my friend obviously still wasn't happy and while hoping to improve the lackluster power he hoped for a nice weight loss when ordering a full Titanium exhaust system...so he just got his new Pro Circuit exhaust system for his CRF 250 2018
TI-6 PRO DUAL CARBON TI-SYSTEM, CRF250R '2018
He really hoped to shed some weight to help the overweight CRF regain some ground...well - NOT SO!
The Pro Circuit Ti system is still quite heavy: 4100g = 9,04 lbs (so just 100g lighter than the modified stocker )
No review on how it performs as we have super-low temperatures and snow over here in Switzerland. But the weight loss was really minimal at best and a big disappointment! Lets hope it rocks the house at least powerwise...
The Shop
Want light, buy a new KTM/husky 125 2stroke.
Now - YOU tell me a reliable source for exhaust weights! There is noone telling you....
There is none available. On a typical Titanium single exhaust system the savings usually are in the 2 lbs region. So having actually 2 exhausts expectations were definitely higher for sure.
My thread is to let people know that at least regarding weight the expense for a titanium Po Circuit system isn't worth it.
Let's hope it rips on track....i will let you guys know.
I don't own a CRF250 but it's good to see stuff like this. If more people reported their findings it would give everyone else the chance to make a more informed decision before dumping a load of money only to be disappointed.
It appears as though Honda have made a fairly light stock system, or the Pro Circuit guys didn't put huge effort into weight savings. Hopefully the performance gains make it a more worthwhile investment!
p.s. im still running your fat bike innertube mod with great success. £8 for a 400g plus saving, still one of the most effective mods I've ever come across, thanks!
But according to the OP, it isn't a couple of pounds lighter. Or even one pound lighter. Once you omit the standard guards that the Pro Circuit design doesn't include, it is just over two-tenths of a pound lighter.
If it was a couple of pounds lighter, it sounds like he may be satisfied.
Ever wonder why a 125cc feels so freaking light? It is flickable and you can throw it around like a bicycle...THAT'S THE WEIGHT , or better the lack of it you feel there! Weight for me is No.1 priority for ages already. As mentioned above i got my 125cc to weigh just 194 lbs and i can tell you it feels like a bicycle. That's 15 kilos / 33 lbs less than a 250F !!!
Less weight can be felt 4 times:
acceleration (lighter accelerates faster)
braking (lighter brakes later)
cornering (lighter bike is more flickable and let's you change line with ease)
fatigue (it tires you less to grip a light bike)
Horsepower instead is an advantage in acceleration only
Pit Row
This thread also proves that Honda definitely put some effort into the stock system...
Four strokes all have gained significant weight since like 08 or so. And they were already significantly heavier than the 2 strokes were.
Ktm IS crushing it with getting weights back down.
Ama needs to drop the weight minimums they are too high for the four strokes.
As for gyroscopic effect, if you ride a KTM 250, 350 and 450 back to back to back, you'll notice a distinct difference in handling even though the weight on the scale isn't much different.
I use lightweight innertubes for FATBIKES, that's those Mountainbikes with huge, fat tires:
Those innertubes are designed for the huge volume tires. So it's not your typical bicycle tube which would get over-streched when being put in a big MX tire. These are already designed for the fat tires and won't get too streched anymore which obviously would weaken them.
German brand Schwalbe SV13J Fatbike innertube:
They come in 26" size yet fit our MX tires front & rear!
Now 99,9% of all guys will say: "but they won't hold up, you get flats all the time"
Well - i'm coming from building ultralight bycicles and when you do some research they did comparison tests on bicycle innertubes where they tested rolling resistances and also tested resistance against punctures. The thin, lightweight innertubes obviously suffer when the puncture comes from a penetrating object (thorns,glass etc). But on a MX track we don't have any objects going through our tires. Our flats are from getting a snakebite when bottoming out or hitting a square edge/sharp rock which pinches our tubes between rim and tire. And the tests on bicycle tubes showed that the gain in protection against pinchflats is only minimally reduced when using thicker tube material....anyway - i'm using these tubes since almost 3 years now and didn't get any more flats than before. BUT i save almost 1 kilo / 2 lbs PER WHEEL (!) by using these innertubes. That's rotating mass! Less rotating mass makes for a flickable bike, you have much less inertia. And once again - lighter wheels make for faster acceleration! A heavy wheel needs more force to be accelerated than a light one....so having lighter wheels is actually like having a more powerful engine!! This is like mounting a turbo on your bike!
I furthermore pair them to Pirelli tires which again are some of the lightest tires around. They're usually about 1 lbs lighter than a comparable Dunlop.
----> in the end you get wheels that are about 5-6 lbs lighter.
Downside?
The Presta valve
For those not wanting to hassle with a bicycle pump:
You can still opt for a Maxxis Fatbike innertube which is just slightly heavier but comes with a more common Schrader valve:
Post a reply to: Pro Circuit Ti-6 Sytem for CRF 250 '18....HEAVY !!