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Description
high speed gears RDLN High-Speed Gear Set (17/49) – GY6 50cc / 139QMB – Scooterworks USA, LLCUnlock Top End Speed: RDLN 17 49 Performance Gear Set Is your 50cc100cc 139QMB engine revving at its limit without providing a higher top speed? The RDLN Performance Gear Set (17 49) is engineered to change your final drive ratio, allowing your engine to push the bike faster at lower RPMs. Depending on your current engine modifications and rider weight, this gear set can net an increase of up to 7+ MPH in top end velocity. Performance & Engineering
Unlock Top-End Speed: RDLN 17/49 Performance Gear Set
Is your 50cc–100cc 139QMB engine revving at its limit without providing a higher top speed? The RDLN Performance Gear Set (17/49) is engineered to change your final drive ratio, allowing your engine to push the bike faster at lower RPMs. Depending on your current engine modifications and rider weight, this gear set can net an increase of up to 7+ MPH in top-end velocity.
Performance & Engineering
- Tall Gearing for Big Bore Kits: Transitioning to a 2.88 Final Drive Ratio (down from the stock 3.41–3.71) significantly reduces "over-revving" and is the essential final step for scooters equipped with 72cc, 80cc, or 100cc Big Bore Kits.
- Hardened Steel Construction: Precision-cut from high-carbon steel to withstand the increased torque of performance engines and prevent gear whine.
- Optimized Efficiency: By lowering cruising RPMs at high speeds, this gear set can improve fuel economy and reduce long-term engine wear.
- Balanced Acceleration: While taller gears slightly reduce off-the-line "snap," the 17/49 configuration provides the best balance of acceleration and high-speed cruising for the GY6 50cc 139QMA/B platform.
Comprehensive Fitment Guide
This gear set is compatible with 139QMB / 1P39QMB engine cases found on nearly all 50cc 4-stroke Chinese scooters:
| Category | Compatible Engine Codes |
|---|---|
| Standard GY6 50 | 139QMA, 139QMB, 1P39QMB, 1P39QMA-2 |
| Extended Codes | YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB, BN139QMB |
| Popular Brands | TaoTao, Wolf, Bintelli, Ice Bear, Kymco (select 4T), SYM, Lance |
Technical Specifications
- Teeth Count: 17 Tooth / 49 Tooth
- Final Drive Ratio: 2.88
- Weight: 540g
- Material: Forged & Hardened Steel
- Installation: Requires Hydraulic Press
Critical Installation Note: This is not a "drop-in" part. Installation requires a hydraulic press to remove the old gears from the secondary shaft and press the new RDLN gears on. Professional installation is highly recommended.
139QMB-based 50cc / 80cc engines with the following engine codes:
| 139QMA | 139QMB | 1P39QMB | 1P39QMA-2 |
| YN139QMB | JJ1P39QMB | 139FMA-2 | BD1P39QMB |
| BN139QMB | 147QMD | Other QMA models | Other QMB models |
Don't see your engine listed? If the engine code includes "QM" or "FM", this product is compatible with your vehicle.
About RDLN: RDLN is a premier line of aftermarket performance upgrade systems and components for scooters. RDLN products are engineered to significantly improve the function, performance, and reliability of your vehicle with the ultimate goal being an optimal balance of price, power, and performance. RDLN’s extensive field-testing network ensures each product exceeds customer requirements and expectations every time. RDLN delivers full-throttle perf
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 10 reviews
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Product Reviews
★★★★★ 4
Not far enough!
Format: Hardcover
Like with all Yalom's novels, he gives us tidbits of himself in terms of self-revelations, but like all of his novels he goes head on into some heavy dialogues about life and the meaning it has or doesn't not have with his "patients". He learns perhaps at times more about himself than the "patients" reveal about themselves, at times the catharis is anything but what Yalom had expected or searched after, but via circumstances out of his "relationship" with them, they discover what it is they were seeking. Happenstance? A seed from the 'dialogue' between therapist and patient had been planted, only to be harvested in its own due time? Yalom certainly does provoke self-reflection, at least in this reader. Would that Yalom would actually have the courage to do more self-revealing about his own inner workings, his own emotional state(s) as he grows older and toward eventual death. But, he refrains from such disclosures just when it seems he is about to pull the curtain to show himself (kinda like the Wizard of Oz, but there is no Toto to do the pulling for him). His intellectual acumen, his analytical mind, his creativity is evident in all his novels, and particularly in this series of 'case studies', but that curtain remains securely tied preventing any in depth self-revelation. Is the therapist "resistant"? His conviction of no after life makes intellectual sense to me, but the emotional content of 'fear' of the unknown is never explored, and sadly not. He could have provided us with an even more powerful invitation into self-awareness, I suspect, if he had gone down that pathway.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 29, 2015
★★★★★ 5
Required reading for novice (and maybe all?) therapists
Format: Hardcover
As a therapist-in training, this book made a powerful impact on me. As a father of two small children, on the verge of a professional milestone (PhD graduation in June), in the midst of an internship where I'm frequently working with children and teens coping with grief or trauma, mortality has been much on my mind lately, framing core values in my process of professional identity formation. In my five years of clinical training so far, I have increasingly become aware that the healing that occurs in therapy is much more about inter-relational "being" than "doing" (i.e the "sheer presence" of the therapist which Dr. Yalom describes in the book), and also that each successful therapy invents its own (often singular) techniques. This of course departs sharply from the idea that human suffering and its therapeutic repair could ever be helpfully reduced to categories or manuals. During my training in the current climate of "evidence-based practices," I have sometimes felt rather isolated adopting that position (although I am fortunate in my internship of finding many like-minded supervisors and colleagues). In that context, the insights imparted in this story collection serve as inspiring confirmation that I am on the right track, and offer a model of the type of therapist I aspire to be someday. I am grateful for the wise mentorship conveyed through Dr. Yalom's narratives.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 13, 2015
★★★★★ 5
A tribute to Kahlil Gibran's endearing and timeless messages.
Format: Kindle
The Prophet (Annotated)- New Modern complete Edition: Original 1923 Text and Illustrations by Kahlil Gibran, With Reflections for Today's World is a very interesting take on an old classic. I have read the original decades ago as well as Gibran's other works and found this version intriguing as it breaths new life through the interpretation of Jonathan Mirel after the original was written over a century ago. A tribute to its endearing and timeless messages.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 13, 2026
★★★★★ 5
A timeless treasure with a fresh touch
Format: Paperback
I’ve read this work before in different editions, this one really stands out. The original text and illustrations are kept intact, which gives it that authentic, almost sacred feeling. What makes it even better are the reflections that connect the ideas to modern life—it’s like the wisdom got updated without losing its soul. A beautiful mix of old and new.
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Reviewed in the United States on September 2, 2025
★★★★★ 5
Important read for today’s day and age
Format: Kindle
The Prophet by Khalil Gibran is a masterpiece of a work and an essential reading for anyone on the path of spirituality and self-realization. I love how the author has provided their own reflections from the modern perspective as well. I enjoyed that because I had already read this book, so reading the reflections helped me gain deeper insights.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 9, 2025
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