SKU: 18617085462

125cc High Comp. Piston

Sale price$108.00 Regular price$120.00
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USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 20 - Jul 25

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Description

125cc High Comp. PistonFits all years Grom and Monkey The DHM Stock Bore High Compression piston has produced more HP than any other stock bore kit, and is the highest compression stock bore piston on the market! It has a high compression dome that is made exclusively for DHM and isn't available anywhere else. It has gone through extensive testing on and off the racetrack and has proven to provide the most power possible from the stock bore. ~13. 2: 1 compression 52. 4mm

Fits all years Grom and Monkey

The DHM Stock Bore High Compression piston has produced more HP than any other stock bore kit, and is the highest compression stock bore piston on the market! It has a high compression dome that is made exclusively for DHM and isn't available anywhere else. It has gone through extensive testing on and off the racetrack and has proven to provide the most power possible from the stock bore.

  • ~13.2:1 compression 52.4mm stock bore piston
  • Larger ring and skirt oiling holes than other pistons on the market
  • Larger oil spring to increase oil volume between the oiling rings
  • Oil ports under the pin holes to keep the wrist pin lubricated
  • 360 Degree skirt design to increase overall strength
  • Racing piston ring kit with pins and circlips
  • Valve reliefs that clear valves up to our 27.5/23.5 cylinder head
  • Includes a new base gasket and head gasket

*Requires NGK CR9E (6263) spark plug (not included)
*Requires 91 or greater octane fuel

**Installing this piston requires setting the ring gaps. If you are not comfortable with this, please have your local shop perform the install. Failure to set the proper piston ring end gap can result in premature failure or seizure of the engine. We recommend an end gap of .007-.009" on the top ring and .009-.011" on the bottom ring.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
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
SKU: 18617085462

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4.6 ★★★★★
Based on 27 reviews
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Verified Purchase
Dianna H
San Leandro, US
★★★★★ 5
Not Scented, but Dog Approved
Size: 2-pack, Style: Duo
They don't smell like peanut butter or bacon. But our dogs still love them.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 31, 2025
W
Verified Purchase
waragon
Phoenix, US
★★★★★ 4
If they squeaked, they would be the perfect ball!
Size: 2-pack, Style: Duo
I bought our 15 month old Coton several Chuck-It toys on an Amazon deal. He is incredibly playful, mischievous, and ball/toy obsessed, especially for anything that makes noise. He can also be very destructive so I love how durable most of their products are - they’re among our longest lasting toys and worth every penny. We have yet to take them to the dog park, but they’re a perfect size for sharing in plat time. And they are keeping him busy at home - that’s a good thing. The scent is subtle but strong enough for him I guess because he loves gnawing on them. If they had squeakers, they would be absolutely perfect. Hopefully Chuck-It will see an opportunity for that down the road!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 28, 2026
R
Verified Purchase
Reepeat
Phoenix, US
★★★★★ 5
Most durable fetch balls I know of.
Size: 2-pack, Style: Duo
These balls are the biggest balls of them all. Well, not the biggest, but the best. Every other ball she would chew up in short order and I'd be throwing her a floppy piece of rubber. She just wants to fetch, but if it's not bouncing, she can't catch it on the bounce. Got these balls in July and no damage to them. I just ordered another pair, but only because the other two somehow got stuck up in trees. We have some very old and very large oak trees so not so easy to retrieve. Hope they somehow drop someday. But in the meantime, Lassie will be happy with her new ones. Very highly recommended!
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Reviewed in the United States on October 28, 2025
B
Verified Purchase
Blonde Aggie
Belleville, US
★★★★★ 5
Works great for scent work! Bounce is great for air retrieve!
Size: 2-pack, Style: Duo, Size: 2-pack, Style: Duo
My dog doesn’t know he loves them yet but I do! They are a little softer so when we do air retrieve, I don’t have to worry as much about his teeth! I’m hoping he will learn to find them by smell vs sight. We often play in the evenings and he tends to loose his ball. Love chuck it! Right now, we have about 10 chuck it balls! The tennis balls don’t work for air retrieve! Chuckit does!!! Love the thrower too! Saves my arm!!!!
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Reviewed in the United States on August 6, 2025
N
Verified Purchase
None of your business
Los Angeles, US
★★★★★ 3
I guess the smell is offputting
Size: 2-pack, Style: Duo
My dog loves chocolate stuff. But for some reason, wasn’t a huge fan of these balls. She played with them a little bit, but they’re not her favorite.
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Reviewed in the United States on December 30, 2025

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