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  3. YAMAHA 1M1-11637-00-00

YAMAHA 1M1-11637-00-00 Nos Piston Oem/nos 0.75MM O/s 3RD

fits model: Dt250. make: Yamaha. year: 1977-78.

1m1-11637-00-00 Yamaha 1m1-11637-00 Oem/nos 0.75mm O/s 3rd Piston 1977-78 Dt250

( Manufacturer Part Number: 1M1-11637-00-00 ), ( Type: Piston ), ( Oe/oem Part Number: 1m1-11637-00 ), ( Material: Aluminum ), ( Universal Fitment: No )

Review YAMAHA 1m1-11637-00 Oem/nos 0.75mm O/s 3rd Piston fits DT250 1977-78

The Yamaha DT250 motorcycle, manufactured between 1977 and 1978, is a classic two-stroke enduro bike known for its durability and performance. One of its essential components is the piston, specifically the third one with an oversize of 0.75mm, part number 1M1-11637-00-00.

This OEM (Original Equipment Manufacturer) piston is meticulously engineered to ensure optimal engine performance. It boasts a forged construction, which provides superior strength and durability compared to its cast counterparts. The piston crown is designed to work efficiently with the engine's combustion process, while the skirt is engineered to minimize frictional losses.

The piston ring grooves are precisely machined to accommodate the correct size and shape of the piston rings. Proper sealing is essential for effective compression and efficient power transfer. The piston also features a cooled skirt design to reduce the risk of piston overheating, which can lead to detrimental engine damage.

Installing this genuine Yamaha piston in your DT250 motorcycle will help maintain its original specifications and performance. It is essential to follow the manufacturer's instructions carefully during installation to ensure proper alignment and seating. Remember, using aftermarket or incorrect parts can lead to potential engine damage and decreased performance.

In conclusion, the 1M1-11637-00-00 0.75mm oversize third piston for the 1977-78 Yamaha DT250 is an essential component for maintaining the bike's performance and reliability. Its forged construction, efficient piston crown, and cooled skirt design all contribute to the piston's superior strength and durability. When replacing or upgrading pistons in your DT250, always opt for genuine Yamaha parts to ensure the best possible results.

The Yamaha DT250 is a classic motorcycle model that was produced from 1973 to 1984. The 1M1-11637-00-00 0.75mm O/S 3rd piston is a replacement part for this motorcycle, specifically designed for use in the 1977-78 DT250 models. In this discussion, we will weigh the pros and cons of purchasing this piston to help you make an informed decision.

Pros:

1. Authenticity: This OEM (Original Equipment Manufacturer) piston is manufactured by Yamaha, ensuring that it is an exact match to the original part.

2. Durability: OEM parts are known for their durability and reliability. Since this piston is specifically designed for the DT250, it is likely to provide longer service life than aftermarket alternatives.

3. Fitment: As an OEM part, it is guaranteed to fit perfectly, reducing the risk of compatibility issues or engine damage due to incorrect part installation.

4. Warranty: OEM parts often come with warranties, providing peace of mind and protection against manufacturing defects.

Cons:

1. Cost: OEM parts tend to be more expensive than aftermarket alternatives. This piston may cost more than other aftermarket options, but the benefits may outweigh the additional cost for some buyers.

2. Availability: OEM parts may be less readily available due to their more limited production. This could result in longer wait times for delivery.

3. Limited Performance Upgrades: OEM parts are designed to meet the original specifications of the motorcycle. If you're looking to increase performance or customize your DT250, aftermarket parts may be a better choice.

Conclusion:

The decision to purchase the 1M1-11637-00-00 0.75mm O/S 3rd piston for your 1977-78 Yamaha DT250 depends on your priorities and budget. If you value authenticity, reliability, and peace of mind, this OEM piston is an excellent choice. However, if cost and availability are your primary concerns, an aftermarket alternative may be more suitable. Ultimately, consider the long-term benefits of using an OEM part, as well as the current state of your motorcycle and your future plans for it, before making your purchase decision.

Recommendation:

If you prioritize originality, durability, and perfect fitment, the 1M1-11637-00-00 0.75mm O/S 3rd piston is a solid recommendation for your 1977-78 Yamaha DT250. However, if you're looking for a more cost-effective or easily available alternative, consider researching reputable aftermarket piston manufacturers and comparing their offerings to ensure a good fit for your motorcycle and personal needs.

Details:

THE PART NUMBER IS 1M1-11637-00 RESEARCH AND DOUBLE CHECK THAT FITS MACHINE. BRAND NEW/NEVER USED YAMAHA 1M1-11637-00 OEM/NOS 0.75MM O/S 3RD PISTON, 1977-78 DT250.

part #: 1m1116370000 prices

  • $104.99-$105.00

specifications fairingcyclemotor:

  • for models: Dt250
  • for makes: Yamaha
  • for years: 1977-78
  • mpn: 1m1-11637-00-00
  • type: Piston
  • oe/oem part number: 1m1-11637-00
  • material: Aluminum
  • universal fitment: No

general fairingcyclemotor:

  • Motorcycle Scooter Parts Accessories > Body Frame > Fairings, Plastics Body Kits
  • condition: New other see details

seller fairingcyclemotor:

  • city: Hesperia, California
  • # reviews: 1238
  • rating: 100.0%

shipping fairingcyclemotor:

  • carrier: USPS
  • service: USPS Ground Advantage
  • class: Standard
  • transit: 3-8 Days
  • type: Calculated
  • cost: $8.10

offer fairingcyclemotor:

  • options: Ship-to-home
  • quantity: 1
  • started: February 23, 2026
  • sold: 0
  • availability: In Stock

returns fairingcyclemotor:

  • paid by: Seller
  • time: 30 Days
  • policy: Returns Accepted

payments fairingcyclemotor:

  • credit card: Discover
  • other
  • wallet: Paypal
for models: dt250, for makes: yamaha, for years: 1977-78, type: piston, oe/oem part number: 1m1-11637-00, universal fitment: no,
category: motorcycle parts > motorcycle scooter parts accessories > body frame > fairings, plastics body kits, material: aluminum, sku: 24033050437888771,
Yamaha 1M1-11637-00-00 Is Similar To:
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2 offers $104.99–$105.00 USD
  • New other (see details). Offer #1 priced at $105.00 + $8.75 shipping estimate = $113.75* total. THE PART NUMBER IS 1M1-11637-00 RESEARCH AND DOUBLE CHECK THAT THE PART NUMBER FITS THE MACHINE.+$8.75 shipping
  • New. Offer #2 priced at $104.99 + $7.42 shipping estimate = $112.41* total. Per Yamaha, this 3rd Oversize / 0.75mm O/S Piston will fit the following models. It was still sealed in the original box from Yamaha, but was removed for the photos.+$7.42 shipping

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