428 vs 428H et 520 vs 520H : la version « Heavy Duty » vaut-elle son prix ?

The thickness of chain pieces of ordinary motorcycle chains is generally 1.5 to 2.0mm, while those with “H” (Heavy Duty reinforced) are thickened to 2.0 to 2.4mm. Is this 15% to 20% more expensive than the regular version worth it? It all depends on what car you play.
If you play cross-country and often encounter severe shocks, this money is definitely worth it. Thickened chain can increase the tensile strength of about 1200 pounds, which can save your 1 life and ensure that you will not suddenly break the chain when flying in mid-air. But if you only travel in the city, or ride a small displacement commute, you can honestly use ordinary chains-it saves the unsprung mass and avoids the chain scratching the engine box.
Many people have a misconception that if the chain piece is thickened, the life span can naturally double? Don’t take it for granted, look at the following track measured data and you will understand that it is completely different.

Don’t guess, professional technicians are looking at “C.C.W.” this 3 indicator

Most motorcycle friends often only look at the price tag when buying chains. However, professional mechanics evaluated whether 1 thickened chain was “more powerful” or “a sharp weapon to destroy the car”, looking at the C.C.W. matrix, that is, clearance (Clearance), strength (Capacity) and weight (Weight).

Clearance: Maybe it will become a “box killer”

The chain piece becomes thicker, which means that the pin shaft also has to be lengthened. The pin length of an ordinary 520 chain is about 17.5 to 18.5mm, but 520H directly exceeds 20.0mm. If you forcibly install 520H on a modern off-road vehicle with extremely compact space, the protruding magic buckle (chain cutting) pin will cut up your chain guide in minutes, and even directly scrape out cracks on the magnesium alloy engine case. Therefore, before placing an order for the “H” chain, remember to measure the margin between the front dental plate and the box with a caliper.

Intensity: Violent Pulling vs Buddha Oil

The tensile strength determines how much destructive power the chain can carry before it breaks. An ordinary 428 chain can withstand about 4200 pounds of tension, while 428H can do more than 5000 pounds. Brothers who play cross-country often play clutch or fall to the ground with full throttle. The huge impact of this instant explosion cannot be carried without this extra strength. But if you usually give oil smoothly on the paved road, you can hardly touch the limit of the ordinary chain in your life.

WEIGHT: A “PARASITIC RESISTANCE” DRAGGGLEGS”

A chain of more than 100 sections, all replaced by thick bottom plates, rotating inertia and unsprung mass rub up. It is normal that the reinforced chain is 10% to 15% heavier than the normal version. If you install 428H on the 1 125cc scooter with low horsepower, you will simply find yourself unhappy-you will lose speed and acceleration performance in vain, and you will not get any practical benefits.

415 vs. 415H: The tangle of fuel moped and mini racing

415 specifications (1/2 inch pitch, 3/16 inch roller width) are very popular in fuel bicycles, 66cc/80cc two-stroke kit modified cars, and juvenile linear acceleration cars.
The engine torque of the modified fuel-assisted vehicle often explosively soars, and the ordinary 415 chain (only 1.2mm thick) as thin as paper is extremely easy to deform or even tear off. And 415H directly pulled the thickness to 1.5 to 1.7mm. As long as your engine is pushed to more than 3 horsepower, 415H is necessary to save your life, otherwise it is no joke to break the chain at 50 kilometers per hour. However, I have to remind the 1 sentence: 415H is relatively hard and has no fault tolerance rate, so your dental plate alignment accuracy and chain tension must be adjusted accurately.

428 and 428H:Pit Bike (cross-country pit car) and how to choose an entry scooter?

By the time you reach a 428‑pitch chain (1/2‑inch pitch, 5/16‑inch roller width), it’s essentially the domain of 100–250 cc motorcycles.Brothers who play Pit Bike (such as deeply modified 110cc or 140cc pit cars) often fly slopes, so choosing ordinary 428 or 428H becomes the key. The inner and outer chain plates of ordinary 428 are 1.5mm, and 428H thickens the outer chain plate to 2.0mm. As long as you’re heading off‑pavement and need a tough‑landings rig, the 428H is a must‑have. However, if you ride Yamaha YBR125 or Honda Grom (spring breeze baboon of the same grade) and walk in the city every day, the strength and absolute performance of ordinary 428 are excessive, and the lighter transmission system will make you ride more briskly.

520 and 520H: Standard equipment for full-size off-road vehicles

520(5/8 inch pitch, 1/4 inch roller width) is the absolute “panacea” specification in 250cc to 750cc off-road vehicles, Lindao endurance racing cars and street circles.
Buy 520 or 520H, all depends on your riding environment. For those who play Endurance (Enduro) or cross-country on the field, the transmission system is crawling in mud, gravel and extreme torque all the year round. 520H (chain plate thickness 2.2-2.4mm) can provide tensile strength of up to 8500 pounds, basically eliminating the tragedy of being thrown halfway to feed mosquitoes because of broken chains in deep mountains and forests.

Debunking the “Lifespan Doubled” Brainwashing Hoax

Many car owners hold a deeply ingrained misconception: they assume that any tire model with an “H” in its designation is more wear-resistant. Remember: the thickness of the chain plate only determines whether it can be torn or not, and has nothing to do with “wear resistance! Chain wear primarily occurs between the internal pins and rollers. An ordinary 520 X-type oil seal chain has a durability of 520H without oil seal for thousands of kilometers. If you want to use it for a long time, pay more attention to the oil seal (O-ring/X-ring) and frequent chain oil maintenance. Only in order to resist the violent pulling of the chain, only buy the one with “H.

50-Hour Track Test: Stretching Data Speaks for Itself

We took two identical 250cc four-stroke off-road motorcycles and subjected them to 50 hours of high-intensity, hard‑riding on a motocross track, specifically to test the physical elongation of their chains.
Standard 520 (non-sealed): You need to adjust the chain tension every three hours of riding. At the 35th hour, the spacing of 10 pins was measured and stretched to the scrap limit.
520H enhanced version (no oil seal): it takes 6 hours to adjust the tension once. After 50 hours of continuous operation, the tensioner adjustment block still had 15% of its adjustment range remaining.
Data doesn’t lie. Under the violent pull of frequent high throttle and oil collection, the 520H thicker chain plate really resisted the deformation, which also proved its hard core strength on the fierce track.

Questions fréquentes (FAQ)

Do I need to change the “H” chain with the tooth changing plate?
No need. The pitch and roller width of the ordinary and enhanced chains are exactly the same. Both the 520 and 520H fit seamlessly with the same 520 chainring.

H version of the chain can use the ordinary version of the magic buckle (chain)?
Absolutely not—never mix them. The outer chain plate of the H version is thicker, so a longer exclusive chain cutting pin is required. If you take an ordinary magic buckle and install it, you will find that the pin shaft is not long enough, and the circlip or rivet cannot be installed at all.

Why did my 520H chain scrape the engine case?
Because the pin shaft of the reinforced chain is longer and the chain plate is thicker, the overall transverse “widens. In some models, the clearance around the front chainring is extremely tight, and after the chain widens, it can rub against the magnesium-alloy housing. Therefore, be sure to measure the clearance before upgrading.

Is 428H heavier than an ordinary 520 chain?
No. The 520 pitch is larger (5/8 inch versus 1/2 inch), and all the components are inherently one size bigger. Even with ordinary chain plates, the weight of the 520 is much larger than 428H.

Is there a version with an oil seal (O-ring or X-ring) for the reinforced chain?
Of course there is. Models like the 520HO or 520HX have been on sale for quite some time. They have both thickened tensile chain plates and oil seals integrated inside, which is regarded as packing the ultimate tensile strength and ultra-long wear resistance into one product.

How much power does a thickened chain actually consume?
If you’re riding a small-displacement 125cc bike, the added rotational mass from the H‑chain will shave roughly 0.5 horsepower at the rear wheel. However, if you are riding a 450cc cross-country, even professional drivers will not feel this power loss at all.