Chaîne 420 vs 35 et T8F : mettre fin aux défaillances des pignons des mini-motos

The 420 chain has a tensile strength of up to 4200 pounds and uses a heavy-duty 1/2 inch pitch, which is definitely standard for large displacement mini motorcycles. In contrast, the pitch of the No.35 chain is shorter (3/8 inch) and can only be used on low-torque 50cc original engines. As for the T8F, that’s another thing entirely-it’s the 1 8mm metric chain for small electric pocket motorcycles. If you have to put the No.35 chain on the 420 centrifugal clutch, or listen to the “T8F and 420 compatible” sprocket blasted by the inferior online store, I’m afraid the teeth on the tooth plate will be all bald before the car leaves its own driveway. Don’t guess the size from the vague product network map any more. The following accurate micrometer measurement data can help you completely break the root of the mini car’s transmission failure.

P. I .R. Three Elements: Stop Guessing The Size Of The Chain

Professional refitting veterans rely on the three core data of “P.I.R.” (I .e. pitch Pitch, inner width, roller diameter Diameter) to ensure the perfect matching of the transmission system. The pitch determines the exact distance between the centers of two adjacent pin shafts. The inner width determines whether the chain plate can smoothly accommodate the tooth thickness of the sprocket. The roller diameter controls how deep the chain can be embedded in the tooth groove. Even if these 3 indicators are only a little wrong, the full load of the engine will be directly pressed on the tooth tips of the sprocket, pulling the tooth tips into sharp barbs, causing the chain to fall off instantly.

420 Vs. No.35 Chain: Standard For Large Displacement Engine

420 chain and No. 35 sprocket must not be mixed. The debate about these two chains is usually most intense when players plan to upgrade the original Coleman mini motorcycle to a high-output Predator 212cc or Tillotson 225cc engine.

The pitch of the 420 chain is 1/2 inch (12.7mm) and the inner width is 5/16 inch. The No. 35 chain has a pitch of 3/8 inch (9.525mm) and an inner width of 3/16 inch. If the thick 420 chain is hung on the No. 35 clutch tooth plate, the roller will directly skip the smaller gear teeth, 1 the oil will slip violently. Do it the other way around? It is physically impossible to force the No.35 chain into the 420 tooth plate, because the 3/8 inch pin spacing cannot be stuck into the 1/2 inch tooth gap. Bottom line: As long as you upgrade the engine, your clutch, rear gear and chain must be synchronized to 420 specifications.

Torque Fatigue Test: 72V Electric Motorcycle Vs. 224cc Fuel Car

We found two identical mini frames and conducted a straight-line acceleration test of 50 ejection starts to observe the stretching of the chain under the impact of huge torque.

No. 35 chain of 72V electric refitting vehicle: it broke directly during the 14th ejection. The instantaneous torque brought by the large-capacity lithium battery directly breaks the tensile limit of 2400 pounds of the 35 chain.

224cc Fuel Refitting Vehicle 420 Chain: Hard to carry 50 violent catapults to start, 1 knots did not break. It was only a slight tightening of the chain in the 25th test. Facts have proved that high-horsepower modified cars do need the 420 system’s powerful damage capacity of up to 4200 pounds.

420 Chain Vs. T8F: “Metric Trap” On E-Commerce Platform”

Don’t buy the kind of tray that claims to be able to adapt to T8F and 420 chains at the same time. The reason why these two chains are mixed together is purely because some overseas sellers have randomly stuffed unrelated keywords in the product titles in order to cheat the number of clicks.

The T8F is the 1 metric chain with a pitch of 8mm, designed for 47cc/49cc two-stroke pocket motorcycles and 36V small electric ATVs. The 420 chain is an ANSI inch standard chain with a pitch of 12.7mm. The link spacing between the two is nearly 5mm. If an 8mm metric chain is hung on a 12.7mm English tooth plate, the side chain plate will instantly get stuck on the gear teeth and directly break the engine output shaft. Before clicking “settlement” to pay, be sure to measure the distance between the three pins on the old chain on hand to find out whether your car is metric or imperial.

415 Vs. Chain 35: Fuel Bike Vs. Courtyard Kart

The mechanics of fuel-assisted bikes and yard karts are very different, so choosing between chain 415 and 35 depends entirely on what car you are playing.

In the 66cc/80cc two-stroke fuel bicycle engine kit, the 415 chain is a well-deserved overlord. Its 1/2 inch pitch is specially designed to avoid the bicycle frame, while retaining the extremely narrow inner width of 3/16 inch. In contrast, the pitch of the No. 35 chain is shorter (3/8 inch), and it is popular in vintage karts and light industrial courtyard equipment. You can’t put a No. 35 chain on a fuel bike, because the drive sprocket of that engine is machined at a 1/2 inch pitch.

415 Vs. 41 Chain: 1/16 Inch Off-Chain Trap

Although the 415 and 41 chains have exactly the same 1/2 inch pitch and 0.306 inch roller diameter, mixing up is bound to cause fatal high-speed jitter.

I don’t know how many novices have been involved in the compatibility of chains 415 and 41, because the naked eye can’t see any difference between them. The danger is actually hidden in the inner width: the inner width of the 41 chain is 1/4 inch (6.35mm), while the inner width of the 415 chain is even narrower, only 3/16 inch (4.76mm).

If the wider 41 chain is hung on the narrower 415 tray, it will produce a horizontal virtual position of 1/16 inch. When the speed soars to 5000 rpm, this loose fit will make the chain shake violently on both sides, greatly increasing the risk of chain off during sharp turns. On the contrary, it is a waste of effort to clamp the narrow 415 chain to the thick No. 41 tooth plate. The chain plate will be held up by the end face of the tooth plate, causing the rear wheel to lock directly.

Foire aux questions (FAQ)

Can I use a 420 master link (hinge) with a 35-size chain?

Absolutely not. The pin spacing of the 420 main chain link is 1/2 inch, while the hole spacing of the No. 35 chain is 3/8 inch. The hole position is not correct at all, and the pin shaft cannot be physically stuffed into the roller of the No. 35 chain.

Why do T8F chains always break after I upgrade my electric ATV?

The original T8F chain is only suitable for extremely low torque conditions (tensile strength is usually less than 1500 pounds). If you change the electric ATV to a higher voltage controller (for example, from 48V to 72V), the instantaneous torque will directly break the T8F roller. Riders who play high-voltage electricity must simultaneously modify the dental plate and replace it with a stronger No.35 or 420 system.

How do you measure the tooth plate of the mini car to know whether to use the No.35 chain or the 420 chain?

Take a tape measure or digital vernier caliper and directly measure the linear distance from one tooth tip on the tooth plate to the adjacent tooth tip. If the measure is exactly 3/8 inch, then you buy chain 35. If it is exactly 1/2 inch, use 420 chain.

Is the 415H chain stronger than ordinary 415?

That’s right. The “H” stands for Heavy Duty. 415H uses thicker side chain plates (usually 1.5 to 2.0mm), which greatly improves its tensile strength, even if the throttle is accelerated, it is not so easy to stretch.

Can No. 40 chain be installed on the clutch of my 420 kart?

Can’t fit, hard fitting will only accelerate wear. Although the pitch of the 40 and 420 chains is 1/2 inch and the inner width is 5/16 inch, the rollers of the 40 chain are too large (0.312 inches vs. 0.306 inches). These oversized rollers will rub wildly in the tooth grooves of the 420 clutch cone, destroying the car very much.