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โ๏ธ Keep your chain tight, your ride smoother, and your build envy-worthy!
The sthus Spring Loaded Chain Tensioner is a high-quality, adjustable guide wheel designed for 49cc, 66cc, and 80cc 2-stroke motorized bikes. Made from durable alloy steel with corrosion resistance, it ensures optimal chain tension and alignment to prevent derailment and sprocket wear. Easy to install with included hardware, this tensioner prolongs chain life and enhances bike performance, making it a must-have upgrade for any serious motorized bike enthusiast.
| ASIN | B07NXX4PV4 |
| Best Sellers Rank | #34,344 in Automotive ( See Top 100 in Automotive ) #2 in Powersports Chain & Sprocket Kits |
| Brand | sthus |
| Brand Name | sthus |
| Customer Reviews | 4.1 out of 5 stars 2,565 Reviews |
| Item Weight | 300 Grams |
| Manufacturer | sthus |
| Material | Alloy Steel |
| Material Type | Alloy Steel |
| Model | AMWZ_MZ0052-1 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Part Number | AMWZ_MZ0052-1 |
| Recommended Uses For Product | Ensuring proper chain tension in 49cc, 66cc, and 80cc motorized bikes |
| Strand Type | Single |
| Unit Count | 1.0 Count |
B**R
Good parts 100%
Works as it should excellent would buy again
H**S
Sthus bring loaded chain tensioner
Works great I use them on my gas bike motors on every build these things connect to the engine and keep the slack on the chain tight self-adjusting spring loaded I love it
D**F
Best bet for chain issues
Excellent quality and fit, has kept my chain on for many miles. Only issue is bolt and nut that hold arm on loosens up. Needs a longer bolt so a lock washer can be installed. Do not overtighten the chain guide, it will not move and will cause issues with the bearings. Definitely worth the buy and far better quality than the closet door looking hardware that comes standard with the bike engines
J**N
Increases operators safety.
Must have, way more reliable than tensioner provided w / kit
M**D
Way better than the one that comes in the kit
Spring broke second week I had it on the bike so I made a new spring and working well now
C**.
Chain tensioner for motorized bicycle.
This is a great tensioner. I would have liked instructions with the unit but the advertisement shows pictures of proper installation. I recommend to add lock nuts and luberican to the tensioner wheel to keep it able to move freely and also on the pivot bolt and nut with washer and lock washer to give it ability to move as needed.
S**T
Garbage
Straight garbage. Didnโt last one start
D**N
Bike parts
Does exactly what it's supposed to do easy install
R**E
Arrived on time
Packaged very good looks to be good quality
J**E
cheap hardware
everything fits good. my only problem is the cheap hardware. 1 bolt the threads all stripped off, and also the heads catch on my pedals. so i have to go to the hardware store and look for a couple better bolts. not a big issue. also the plastic roller wheel seems rather cheap, not sure how long its gonna hold up. for the price i guess it was worth it.
W**M
The best!
I struggled with many chain tensioners thinking ok i got it this time...? Dont kid yourself.. spring-loaded tensioners are the best solution for sure! The one thing I needed to do.. I grinded the bolt heads down about half.. so crank peddle can pass freely.. Use double nuts on the bolt harnessing flex part, to lock tight but still loose enough for tensioner to flex.. Thats it.. Works great!
C**H
Doesn't fit Goplus 80cc 2stroke motor
Love the idea, hate that I can't make it work.
J**N
I do not recommend
Not a good setup, when trying to start the bike the torque on the chain is opposite of tension side causing the chain to slack and bind up solid in housing. I had to remove this and go with standard tensioner that came with the kit. So this is useless to me not.
Trustpilot
2 months ago
4 days ago