APRILIA 1A007421 Rear Front Shiver Navi Cylinder Heads Jug 642387 Block Motor Valve

( Manufacturer Part Number: 1A007421 ), ( Type: Cylinder Heads ), ( Country Of Origin: Italy ), ( Color: Black Red ), ( Manufacturer Warranty: Unspecified Length ), ( Placement On Vehicle: Front Rear ), ( Storage Location: G.4.b.1 S000065-x ), ( Custom1: 201638 ), ( Finish: Raw ), ( Machine Type: Street Motorcycle ), ( Oe/oem Part Number: 642387 )

Review APRILIA Shiver Navi Front And Rear Cylinder Heads Jug Block Motor Valve fits 900 2017–2020

The Aprilia 1A007421 17-20 Shiver 900 Navi front and rear cylinder heads and jug block motor are key components of this high-performance motorcycle engine. This engine is part of the Shiver 900 Navi model, which is known for its agility, power, and advanced technology.

The cylinder heads are made of aluminum alloy, which contributes to the engine's lightweight construction while maintaining strength and durability. Each cylinder head houses four valves, which are operated by a DOHC (Double Overhead Camshaft) system. The intake and exhaust valves are designed to optimize engine breathing for maximum power and efficiency.

The jug block motor, or the engine's crankcase, is also made of aluminum alloy. It houses the crankshaft, pistons, and connecting rods, which work together to convert the energy from the combustion process into mechanical power. The design of the jug block motor allows for a compact and efficient layout of the engine components.

The Aprilia 1A007421 motor valves are crucial for the proper functioning of the engine. These valves control the flow of air and fuel into the cylinders and the exhaust gases out of the engine. They are designed to seal tightly to prevent any leakage and to provide optimal engine performance. The valves are actuated by the DOHC system, which ensures precise control over the engine's intake and exhaust processes.

In summary, the Aprilia 1A007421 17-20 Shiver 900 Navi front and rear cylinder heads, jug block motor, and valves are essential components of this high-performance motorcycle engine. They are designed to provide optimal engine breathing, efficiency, and power, making this engine a key contributor to the agility and performance of the Shiver 900 Navi motorcycle.

The Aprilia 1A0.742.1 17-20 Shiver 900 Navi motor is a liquid-cooled, 900cc, V-twin engine produced by Aprilia. Replacing the front and rear cylinder heads, jug block, and motor valves is a significant repair job that involves a good deal of labor and expense. Here are some pros and cons to consider before making the decision to buy these parts.

1. Improved Performance: Replacing worn-out cylinder heads, jug block, and valves can result in improved engine performance. New parts can help increase horsepower, torque, and fuel efficiency.

2. Longer Engine Life: Worn-out parts can lead to engine damage if left unaddressed. By replacing these parts, you can extend the life of your engine and avoid costly repairs down the line.

3. Better Fuel Economy: Worn-out parts can cause your engine to work harder than it needs to, resulting in poor fuel economy. New parts can help your engine run more efficiently, saving you money on fuel over time.

1. Cost: Replacing the front and rear cylinder heads, jug block, and motor valves is a significant repair job that can be expensive. The cost of the parts alone can run into the thousands of dollars, and labor costs can add to the total expense.

2. Time: This repair job can take a significant amount of time to complete. Depending on the shop's workload and the complexity of the repair, it could take several days or even weeks to get your motorcycle back.

3. Complexity: This repair job is not for the faint of heart. It requires a high level of mechanical expertise and specialized tools. Attempting to do the repair yourself could result in damage to the engine or even personal injury.

The decision to buy the Aprilia 1A0.742.1 17-20 Shiver 900 Navi front and rear cylinder heads, jug block, and motor valves depends on several factors. If your motorcycle is experiencing performance issues or you're concerned about the long-term health of your engine, replacing these parts may be a worthwhile investment. However, the cost and complexity of the repair job should not be taken lightly. It's essential to weigh the benefits against the expenses and consider alternative options, such as selling the motorcycle or rebuilding the engine, before making a decision. Ultimately, it's recommended to consult with a professional mechanic or motorcycle shop for advice on the best course of action for your specific situation.

Details:

Structurally sound, journals look good, original red finish on covers. Cylinder Head Pair - Front and rear cylinder heads with red valve covers camshafts. OEM 1A007421, 1A007422, 1A0090635.

part #: 1a007421 prices

• $94.99-$375.74

specifications cylindermotorcycleiz:

• for models: 900
• for makes: Aprilia
• for years: 2017-2020
• mpn: 1a007421
• type: Cylinder Heads
• country of origin: Italy
• color: Black Red
• manufacturer warranty: Unspecified Length
• placement on vehicle: Front Rear
• storage location: G.4.b.1 S000065-x
• custom1: 201638
• finish: Raw
• machine type: Street Motorcycle
• oe/oem part number: 642387

returns cylindermotorcycleiz:

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

payments cylindermotorcycleiz:

• credit card: Discover
• wallet: Google-pay
• other

offer cylindermotorcycleiz:

• quantity: 1
• options: Ship-to-home
• sold: 0
• availability: In Stock
• started: January 20, 2026

seller cylindermotorcycleiz:

• rating: 99.3%
• city: Odessa, Florida
• # reviews: 206094

shipping cylindermotorcycleiz:

• type: Fixed
• carrier: FedEx
• cost: $0.00
• class: Standard
• transit: 3-8 Days
• service: FedEx Ground / FedEx Home Delivery

general cylindermotorcycleiz:

• condition: Used
• Motorcycle Scooter Parts Accessories > Engines Engine Parts > Cylinder Heads

Aprilia 1A007421 Is Similar To:

• 2a000171 Aprilia Rr Rf Oem Complete Cylinder Head Valves Spring Fits (40.5% similar) Missing one exhaust valve new it retails for over USPS priority mail is the most affordable option but still shipping overseas not inexpensive...(March 29th, 2018)
• 2a0007684 Aprilia Tuono Oem Complete Cylinder Head Valves Spring Fits To (39.5% similar) USPS priority mail is the most affordable option but still shipping overseas not inexpensive...(March 30th, 2018)
• 857079 Aprilia Factory Front Or Rear Cylinder Head Valve Cover (55.3% similar) This is a great replacement for crashed or damaged parts. Seals gaskets and hardware are not included. This part will also fit non-factory model's only difference is these are made of lighter weight magnesium. Check pictures to see condition of item, and what you in pics is are purchasing. This will...(January 5th, 2019)
• 875413 Aprilia Shiver Front Engine Top End Cylinder Head (50.7% similar) ...(March 28th, 2018)
• Ap0610710 Aprilia Front Valve Head Cover (29.2% similar) ...(July 22nd, 2018)
• Ap0613465 Aprilia Rsv1000 Tuono Front (28.3% similar) What you see is get...(August 23rd, 2017)
• Ap0623365 Aprilia Engine Front Cylinder Head (44.8% similar) ...(July 22nd, 2018)
• Ap9150317 Not Specified Aprilia Engine Motor Cylinder Rear Head (34% similar) Help prevent bike theft don't buy the cheapest item you can find, only purchase from a reputable dealer. Most vendors give a 14 day warranty. Our buyer has a chance of buying stolen parts...(August 10th, 2018)
• Ap9150318 Aprilia Sxv Cylinder Head (38.4% similar) Please reference the part number to assure fitment before purchasing. Ready to bolt on. Great shape head complete with cover, camshaft, valves, springs, rocker arm, sensor, etc...(April 28th, 2017)
• Ap0610715 Aprilia Used Rear Valve Cover Rsv 1000 Tuono 2004-2009 (27.3% similar) Please verify this is the correct part before purchase. You can through with any questions. The owner of worsens's auto cycle marine is an arse certified master tech and a factory trained BMW master technician with nearly fifteen years experience working on European cars. Colors may appear slightly ...(March 9th, 2016)
• 211660 Aprilia Rsv Mille Cylinder Head Cap Valve Cover Front Used (40% similar) ...(December 10th, 2020)