When it comes to motorcycle whistles, we have to talk about the Honda CB400. This engine uses gear transmission timing. There is a saying that Honda cannot be ridden badly. It may be that Honda pursues the quality of motorcycle engines and uses a spur gear set to drive timing, but there is a gap in transmission between spur gear sets. How to close the gap? Smart engineers used a double gear set with coaxial gears and a little more.
How to change the sound of motorcycles?
Speaking of motorcycle whistles, we have to talk about the Honda CB400, this one For engines with gear transmission timing, there is a saying that Honda cannot ride badly. It may be that Honda pursues the quality of motorcycle engines and uses a spur gear set to drive timing, but there is a gap in transmission between spur gear sets. How to close the gap? Smart engineers adopted a dual gear set coaxial gear design with a little bit of staggered teeth to eliminate the gap. Of course, this also brought us very good staggered tooth transmission noise - when the engine is running.
So how to make a whistle sound from an engine that does not whistle? I believe friends who like motorcycles may know that a man has launched a whistle replacement kit on a certain hand and a certain treasure. A big drum with a wrong-tooth clutch can theoretically be installed on all motorcycles except scooters. However, there is a problem that the clutch drum gears of domestic single-cylinder motorcycle engines, including double-cylinder motorcycle engines, are not very thick. Therefore, the disadvantages of using wrong teeth for the wire-cut clutch drum gear are the weakening of the clutch drum gear and the wear of the crankshaft driving gear. will also increase.
Another method is to machine an engine with a balance shaft to have staggered teeth on the balance shaft drive gear. The load of the balance gear is much lower than that of the clutch drum gear and is relatively stable. For the CG ejector engine, the timing gear can be processed into staggered teeth, so that the whistle is closest to Honda's whistle. Because the transmission ratio is 1:2. Of course, for a CG engine with a balance shaft, if the balance shaft gear is machined with wrong teeth and the timing gear is machined with wrong teeth, then the engine whistle can be said to be the most like a Honda CB400.
The engine whistle ends here.
Can a blue motorcycle license plate be exchanged for a yellow license plate?
A motorcycle blue card cannot be turned into a yellow card.
The difference between blue and yellow motorcycle cards:
If the displacement is greater than 50ml, a yellow card is required; if the displacement is less than 50ml, a blue card is required. License plate colors are not determined by pedals or straddles, but by motorcycle engine displacement. The blue motorcycle brand is a moped, some people call it a moped, and the yellow motorcycle is a gravity motorcycle or an ordinary motorcycle. Age restrictions: Those over 70 years old cannot drive yellow plate motorcycles, their driver's license will be downgraded to F plate, and they can only ride blue plate motorcycles. All motorcycles with yellow license plates are allowed to bring one person, while all motorcycles with blue license plates are prohibited from bringing one person.
Driving license required:
Whenever you drive a motor vehicle, you need a corresponding driver's license. Blue motorcycles with engine displacement less than 50ml can drive with F license, while yellow motorcycles can only drive with E license or D license.
How to change the sound of motorcycle noise @2019