Posts
539
Joined
6/15/2015
Location
Singapore, SG
KTM boys with matching tumors on their headers
Abomination on Tomac’s bike
Upgrade to enjoy this feature!
Vital MX fantasy is free to play, but Premium users receive great benefits. Premium benefits include:
- View and download rider stats
- Pick trends
- Create a private league
- And more!
Only $10 for all 2026 SX, MX, and SMX series.
Its for noise .
Chase Sexton raced with that header midway through last years season. It’s to help the bikes meet the sound decibel requirement. Nothing new anymore
What, so a Pepsi can, stuck on the side, is any better?
The Shop
DeCal Works Huge Plastic Inventory of UFO and Polisport kits.
Luxon 4-Post Bar Mounts
$189.95 - $239.95
Free shipping: VITALMX
?
On the header pipe of the Honda
Not seeing it
It's a Mich Ultra can, not a pepsi can.
It'll burn your lips.
...
That's clearly a Red Bull can..
...And it failed sound testing on Prado at A-1 🤡
If only there was an alternative option.. 🤔
Best kept secret- The KTM factory bikes are really 2 strokes!!!!
4-strokes that identify as 2-strokes...
Added material on Tiga’s 450 head pipe ⤵️. Are the OEMs sacrificing too much low-end?
As I understand it.....the initial diverging shape of an expansion chamber boosts exhaust scavenging. I could see some benefit to this on a 4-stroke too. Less reliance on the momentum of the piston to push the exhaust out. Improved efficiency?
The converging section produces positive pressure waves to seal the cylinder. Doesn't seem as critical on a 4-stroke since there're valves that do the job. But an added benefit of these positive pressure waves being sent back toward the engine is a decrease in noise at the exhaust. Someone please correct me if I'm wrong.
Ducati also has this header style on their 26 MXGP bikes...
Post a reply to: Abomination on Tomac’s bike