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Honda
1999-2008 Honda TRX400EX Engine Rebuild Service
- SKU:
- TRX400EX Engine Rebuild Service-TE
- Condition:
- Refurbished
- Availability:
- Ships back in 4 to 6 weeks
- Shipping:
- Free Shipping
1999-2008 Honda TRX400EX Engine Rebuild Service:
Is your TRX400EX having any of these problems?
Lost compression? Bogging throttle response? Slapping or clunking engine noise? Locked-up motor?
If you're nodding yes, it's time for a rebuild.
We offer two precision-crafted services tailored to your budget and riding style — whether you're chasing trail reliability or race-day performance.
Option 1: Top End Rebuild Service (recommended for low compression, smoking, oil-loss or top-end ticking noises)
Service Includes:
- Clean, prep, disassemble top end
- Clean, inspect, and measure all top end components
- Cylinder Inspection: bore / hone (as needed)
- Cylinder Head Inspection: remove carbon build up, grind & lapp valves (as needed)
- Install New Parts
- Assemble to factory torque specs
- Set Ignition Timing & Valve Clearance
Parts Included in Top End Rebuild Service:
- (1) Wiseco Forged Series Piston
- (1) Wiseco Piston Ring Set
- (1) Wiseco Piston Wrist Pin
- (2) Wiseco Piston Circlips
- (1) Wiseco Top End Gasket Kit
Option 2: Complete Engine Rebuild Service (recommended for knocking noises, seized engine, worn transmission, or complete failure)
Service Includes:
- Everything from Top End Rebuild, plus:
- Complete engine disassembly
- Clean, Inspect, and measure all internal components
- Media or vapor blasting of cases, cylinder, and head
- OEM color-match paint with oven-cure finish
- Transmission and clutch inspection
- Install New Parts
- Reassembly to factory torque specs
- Set ignition timing and valve clearance
Parts Included in Complete Engine Rebuild Service:
- (1) Wiseco Crankshaft Assembly
- (2) Wiseco Crankshaft Bearings
- (1) Wiseco Forged Series Piston
- (1) Wiseco Piston Ring Set
- (1) Wiseco Piston Wrist Pin
- (2) Wiseco Piston Circlips
- (1) Wiseco Camshaft Chain
- (1) Wiseco Top End Gasket Kit
- (1) Wiseco Bottom End Gasket Kit with Oil Seals
- (7) Genuine OEM Honda Fiber Clutch Plates
- (1) Genuine OEM Honda Oil Filter
- (1) Maxima Assembly Lube
- (1) Hour Meter with Mounting Bracket and Decal
- Includes Wiseco Limited Warranty
Benefits
- Precision OEM Fit: Each component matches factory tolerances for a hassle-free rebuild
- Superior Durability: Heavy-duty materials stand up to off-road heat and stress
- Restored Power & Efficiency: Balanced assembly promotes consistent power delivery and reliability
- Time-Saving Completeness: All necessary parts in one package eliminate back-and-forth ordering
- Cost Savings: Wiseco Engine Rebuild Kits can save you hundreds of dollars versus the same OEM Parts
Additional Info
- All pricing includes listed labor, and listed parts for each service
- Additional parts needed? You'll get a detailed estimate with NO ADDITIONAL LABOR CHARGES.
- Professionally rebuilt with precision and care
- This service is for all 1999-2008 Honda TRX400EX models.
- Click here for Tips on Shipping Your Engine
- Return shipping is on us—once your engine rebuild is complete, we’ll cover the cost to ship it back to you!
Not sure what service you need?
Click here to Send Us a Message and we can help you get the correct parts and service.
Shipping
Please allow 2 business days for processing. Order conformation email will be sent. Please allow 5–7 business days for delivery after processing. We’ll send you tracking info as soon as your order ships! You may also log into your account for updates to your order.
Return Policy
We must be notified within 48 hours of receiving your package of any damage caused during shipping. NO Returns on Any Installed Parts. NO Returns on Tires. NO Returns after 14 days. No Cancellations. See our full shipping and return policy here. https://rebuiltpowersports.com/shipping-and-returns/
Products are guaranteed to fit for the model and model years described. Part numbers have been superceded to the most updated part numbers from the manufacturer. All incoming parts from manufacturers and out going parts to customers are 100% inspected for manufacturer defects, damage or missing items before shipping to customers.
Here are some questions and answers to help you along the way.
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How long will it take to get my order?
Many factors contribute to shipping. When a parts kit order is placed it usually takes 7 to 10 business days from time of order until the customer receives the order. Weekends and Holidays are not business days. But carriers do have delays due to weather and other events beyond our control.
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Where is RebuiltPowerSports located?
Rural Northern Minnesota. About 100 miles south of the Canadian border.
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Do I have to pay Tax on my order?
Only customers from Minnesota pay Tax. When you enter your zip code at time of checkout, the tax will be added if necessary.
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Do you have parts for other kinds of vehicles?
We have parts and do engine work for Honda, Yamaha, Suzuki, Kawasaki, and Polaris. ATV's , Side by Side's , and Dirt Bikes.
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What kind of engine work do you do?
We do CNC cylinder boring-honing, cylinder sleeving, cylinder plating, crankshaft rebuilding, cylinder head rebuilding, complete engine rebuilding, and full engine restorations.
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What if some parts are no longer available or too old?
We have partners that still have many Vintage NOS Parts for a lot of models back to about 1966. Not all OEM parts are still avaiable.
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Do you offer Free Shipping?
YES. We offer Free Shipping on all parts orders. We will also pay the return shipping for you on most repair services.
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What is the turn around time to bore my cylinder?
After we receive your cylinder, it will take about 2 weeks to get it back to you, unless more repair or special parts are needed. We can also supply you with a New Piston Kit & Gasket Kit.
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How come I dont see my parts listed I need?
With millions of parts available, it is very hard to list everything. We add new parts and engine repair services to models every day. If you dont see something you need, use our Contact Us page and send us a message. We answer emails 24/7. You will get a reply within 24 hours.
