Removing the Cams

Next, remove the cam's chrome, outer cover, assembly.

Tip: You won't have to remove the little, circular, 'Yamaha' cover or the decompression lever. They'll both come out with the cover. Just be careful not to put much pressure on the decompression lever, as it is easily bent.

Stuff a rag or rubber glove into the bottom of the cam area to prevent small parts from disappearing into the crankcase. Label a sandwich baggie, "Cam Area Small Parts."

Extract the small, solid aluminum, alignment dowels from the engine case or the cover, and store them in the baggie.

The cams' drive/driven gears are now exposed. Extract both decompression needles and place them in the baggie. See photo below.

Next, remove the nut and washer in the center of the driven gear--the bigger one. Now, pull the gear off its shaft. As you do this, be careful to keep track of the tiny, shaft, straight-key. See photo below.

Store the key in the "Cam Area Small Parts" baggie.

Repeat this process for the cam drive gear. Note: It has a tiny key, as well.

Next, remove the large front-cam retainer-washer by removing its two little bolts. Refer to the photo below. Store these three in the "Cam Area Small Parts" baggie.

Now, remove the seven bolts securing the cam cover. Then remove the cover. As you do this, be very careful that the cams do not fall out. You can prevent this by pressing the ends of the cams as you extract the cover. Just be careful as you go; cam surfaces are very delicate.

Remove the cams.

Re-install the drive/driven gears, nut, bolt, and washers--hand tight only--onto the ends of the cams. Then wrap, label, and store each cam.

Next, remove the brass, cam oil delivery tube (and its two O-rings) from the cam cover, unless you have no need to remove the tube--such as powdercoating, crankcase machining, or nearby welding. To remove the tube, just push and wiggle the it out from the inside. See photo below.

Place the parts into the "Cam Area Small Parts" baggie, then securely seal and store the baggie.

To access related articles, refer back to the Complete Engine Tear Down, Orientation article in this series to see which additional articles best address your situation.

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DISCLAIMER: This information and procedure is provided as a courtesy and is for informational purposes only.  Neither the publishers nor the authors accept any responsibility for the accuracy, applicability, or suitability of this procedure.  You assume all risks associated with the use of this information.  NEITHER THE PUBLISHERs NOR THE AUTHORs SHALL IN ANY EVENT BE LIABLE FOR ANY DIRECT, INDIRECT, PUNITIVE, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, OF ANY NATURE ARISING OUT OF OR IN ANY WAY CONNECTED WITH THE USE OR MISUSE OF THIS INFORMATION OR LACK OF INFORMATION.  Any type of modification or service work on your motorcycle should always be performed by a professional mechanic. If performed incorrectly, this procedure may endanger the safety of you and others on your motorcycle and possibly invalidate your manufacturer’s warranty.

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