Honda CRF450 Engine Teardown | 2005 Honda CRF450 Engine Rebuild Project | Partzilla.com

Check out the Wiseco Garage Buddy kit for the Honda CRF450R here: http://partzil.la/Honda-CRF450-Garage-Buddy-Kit

If you’re going to rebuild the engine on a Honda CRF450R, you have to get it apart first, and that’s what we’re doing here. In this video, we’ll show you how to remove the engine on your CRF450R, then disassemble the top end on the CRF45R, and then perform a bottom end teardown on our CRF450R.

The process begins with engine removal. We’ll drain the fluids first and then tackle the bolts one at a time. We’ll drop out the exhaust, the radiators, and the carburetor before pulling the engine out of the frame. Now there’s a trick to this part: you need to turn the motor a certain way to get it out of the frame.

See this CRF450 frame diagram to identify many of the bolts that bisect the motorcycle: https://www.partzilla.com/catalog/honda/motorcycle/2005/crf450r-a/frame-05?utm_source=youtube&utm_medium=video&utm_campaign=description_btf

See how the radiators are connected here: https://www.partzilla.com/catalog/honda/motorcycle/2005/crf450r-a/radiator-05?utm_source=youtube&utm_medium=video&utm_campaign=description_btf

See how the swingarm is mounted here: https://www.partzilla.com/catalog/honda/motorcycle/2005/crf450r-a/swingarm?utm_source=youtube&utm_medium=video&utm_campaign=description_btf

With the engine removed, we’ll start getting it torn down. We’ll start by getting off the valve cover and finding top dead center. Then we'll go after the cylinder head and the piston, and you’ll need to be patient here because you need to loosen the bolts incrementally to relieve the torque on the bolts evenly. With this part done, we’ll get our first good look and the valves, piston, and cylinder walls.

See the Honda CRF450 cylinder head diagram here: https://www.partzilla.com/catalog/honda/motorcycle/2005/crf450r-a/cylinder-head?utm_source=youtube&utm_medium=video&utm_campaign=description_btf

See the camshaft and valve assembly: https://www.partzilla.com/catalog/honda/motorcycle/2005/crf450r-a/camshaft-valve?utm_source=youtube&utm_medium=video&utm_campaign=description_btf

The CRF450 piston diagram is here: https://www.partzilla.com/catalog/honda/motorcycle/2005/crf450r-a/crankshaft-piston?utm_source=youtube&utm_medium=video&utm_campaign=description_btf

Next, we’re digging deep into the engine to tear down the bottom end of the motor. This will involve spitting the crankcase halves.

We’ll start with the clutch and move from one side of the engine to the other, tackling the water pump, the stator, and the flywheel, which will require a special tool to remove. Then we’ll go after the shifting mechanism. At that point, we’ll split the cases. John has some trouble getting the case halves apart, but he’ll guide you though his thinking as he works through getting the motor cracked open.

Then we’ll grab a handful of transmission and pop out the crankshaft to finish off this phase of the project.

See the Honda CRF450 clutch diagram here: https://www.partzilla.com/catalog/honda/motorcycle/2005/crf450r-a/clutch?utm_source=youtube&utm_medium=video&utm_campaign=description_btf

See the crankcase here: https://www.partzilla.com/catalog/honda/motorcycle/2005/crf450r-a/crankcase?utm_source=youtube&utm_medium=video&utm_campaign=description_btf

The CRF450 transmission diagram is here: https://www.partzilla.com/catalog/honda/motorcycle/2005/crf450r-a/transmission?utm_source=youtube&utm_medium=video&utm_campaign=description_btf

VIDEO HIGHLIGHTS:
Introduction - 0:00
Draining the fluids - 1:10
Removing the seat - 3:30
Removing the fuel tank - 3:40
Removing the fender - 4:40
Removing exhaust - 6:00
Removing radiators - 7:10
Disconnecting the carburetor - 10:10
Disconnecting the clutch - 11:20
Removing the ignition coil - 13:00
Unbolting the engine - 13:15
Disconnecting the swingarm - 15:00
Removing the motor - 17:30
Removing the valve cover - 19:30
Finding top dead center - 20:00
Removing the cam chain tensioner - 21:35
Removing the cam assembly holder - 22:45
Unbolting the head - 23:45
Removing the head - 24:30
Unbolting the cylinder - 25:20
Removing the piston - 26:30
Removing the clutch - 2:45
Removing the clutch basket - 36:50
Removing the crankcase cover - 37:45
Removing the stator - 39:45
Removing the flywheel - 42:15
Removing the crankshaft gear - 44:15
Splitting crankcase halves - 37:35
Removing the transmission - 53:15
Removing the crankshaft - 54:15

Shop for OEM Honda motorcycle parts here: https://www.partzilla.com/catalog/honda/motorcycle?utm_source=youtube&utm_medium=video&utm_campaign=description_btf

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In the video we’re working with a 2005 Honda CRF450R, but you may have similar steps for your Honda dirt bike. If you’re not sure whether these steps apply to your machine, leave a comment and we’ll get back to you.

Видео Honda CRF450 Engine Teardown | 2005 Honda CRF450 Engine Rebuild Project | Partzilla.com канала Partzilla