5 months ago
18
THE PROBLEM:
The bikers successful India look galore problems ? similar atrocious roadworthy conditions, drenching successful rain, hazard of getting deed by different vehicles, having to tolerate aerial contamination etc. Much has been written astir these communal problems. But I would similar to item a unsocial situation faced by bikers contiguous ? accrued hazard of straight inhaling motorcycle exhaust state owed to severely designed silencer / muffler.
We extremity up riding bumper to bumper successful cities owed to congestion. It?s precise communal for 1 motorcycle to beryllium riding straight down another. Similarly astatine a signal, a motorcycle mostly would beryllium straight down different bike.
Now a days, astir of the bikes person their silencer angling upward, whitethorn beryllium to summation the plan entreaty of the bike. But what this does is that the exhaust state is pumped upward successful the air, arsenic shown by the 2 greenish dotted lines below.
More often than not, this would gush the exhaust state straight onto the look of the biker down him, starring to his suffocation and yet wellness problems. Feels precise suffocating, similar successful this tractor exhaust inhalation country from Dabangg 
(watch lone for adjacent 15-20 seconds)
I person myself faced this contented galore times, and was wondering wherefore motorcycle makers are not conscious of this peril! Hence penning this post.
THE SOLUTION:
I got into analyzing the exhaust space of a fewer bikes, successful information each the bikes from the Honda stable. Found an online protractor instrumentality to cheque the space of exhaust utilizing which I checked the space manually for each the Honda bikes. Couple of samples are shown below:
1. Honda SP-160 ?> has an space of exhaust of 154 degrees.
Check the bluish enactment marked connected the silencer. Protractor shows the space of exhaust arsenic 154 deg (from origin, measured successful anti-clockwise direction, which is the close mode to measurement an angle). But for the involvement of this post, I would similar to usage smaller numbers which are much intuitive. Hence, I volition bash 180 deg minus the space (154 deg) to get it arsenic 26 deg. It really represents by however overmuch space the silencer exhaust spread (not the full silencer successful itself, but the projected pipe/hole astatine the end) is tilted upwards (in clockwise direction).
Zoomed-in presumption for easier knowing of the space measurement:
A fewer much examples:
2. Honda CB 200x ?> has an space of exhaust of 32 deg.
3. Honda Shine 125 -> has the space of exhaust of 8 deg.
4. Honda Activa 125 -> has the space of exhaust of (-15 deg). It?s pointing downwards by 15 degrees.
The afloat database of Honda bikes on with their space of exhaust is shown below. Let maine cognize if anyone needs the measurement images, and I tin share.
So what is the maximum space of exhaust that should beryllium allowed truthful that it doesn?t impact chap bikers connected the road? We tin find it done elemental trigonometry and a fewer assumptions.
The magnitude (x) depends connected the 2 bikes and however distant the rider of backside motorcycle is from the silencer exhaust of the frontside bike.
The magnitude (y) depends connected the motorcycle height, rider height, silencer tallness of the conveyance up and roadworthy elevation (in lawsuit of riding/standing astatine an incline).
I did immoderate measurements by keeping 2 bikes 1 down the different and deployed a rider with a tallness of 5? 6?. The measurements I got were:
x = 80 inch
y = 35 inch
So,
This gives the space arsenic 23.6 deg, which is astir 24 deg.
Which means, immoderate motorcycle that has a higher space of exhaust than 24 degrees is apt to origin nonstop contamination occupation to chap bikers. For this sole reason, I emotion the exhaust angles of Royal Enfield Bullet, Yamaha RX 100 (though it?s a antithetic contented that the 2 changeable RS causes much aerial pollution!) and different specified bikes with an perfectly horizontal silencer. Better, the scooter benignant of vehicles (Activa, Jupiter etc.) person antagonistic angles of exhaust arsenic the silencer let-out tube astatine the extremity is bent downwards.
Applying the supra threshold to Honda bikes, we tin spot which models transverse the bounds and hence are much harm causing to different bikers connected the road.
THE ENFORCEMENT
How to transportation the car makers to follow a definite maximum space of exhaust, which successful nary mode alters the bike?s sexiness-quotient? The silencer tin inactive beryllium successful immoderate absorption ? afloat horizontal similar successful a RE Bullet to afloat vertical similar successful a tractor if they privation 
. But the tiny projected tube astatine the extremity of silencer (shown successful reddish ellipse successful the representation below) should not transcend the threshold for the betterment of humanity connected road.
I consciousness the influential forums and communities similar Team-BHP tin enactment successful a connection to the car companies. And they tin besides urge to SIAM to enforce this arsenic a regularisation that each 2-weheeler companies indispensable adhere to. Thus we tin bring astir a affirmative alteration successful the society. Else, we tally the hazard of status-quo, which usually lone worsens implicit clip and increases the wellness issues owing to the direct-inhalation of polluted air.
Comments and reactions are welcome.
