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October 22nd, 2018, 10:45 AM   #1
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I Ride: vintage mx and Hypermotard road
FC470 camshaft?

Hello! I have a 2001 FC470, which I recently picked up.This bike does not appear to have been used more than 30-40 hours total. 8 years ago new crank bearings and 2 balance weight bearings were installed. The camchain made a slapping noise when kicking over and there was no spark. New stator fixed the spark issue. I have ordered a camchain, dual springs for valves, intake valves (they were tuliped) and rocker arm rollers. I have just purchased on ebay a camshaft from a 2004 450 that I plan on using instead of the camshaft currently in the 470 (steel sprocket and is marked 49/00 53) The 2004 camshaft is marked 800-5521 3/4067. My question is this 2004 camshaft a suitable replacement if my goal is to have a reliable engine that will used as a fun practice bike by a 69 year old vintage motocross rider? I do not prefer an engine that must be revved all the time or one that is all low end torque. thanks for any advice or information. John
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October 22nd, 2018, 11:34 AM   #2
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You hit the nail on the head. The 04 cam will be a great upgrade imo. The 01 470's were stump pullers. Crack the throttle and it starts to dig a ditch. The 04 cam will soften the low end hit and give an overall smoother power delivery. It will also help with starting. Use the upgraded 04-08 autodecompression device to take full advantage of the better starting attributes of the 04-08 cam.

With the superior 04-08 cam and ADC you will probably be able to lose the kickstart activated decompression cable and hardware if you want.
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October 22nd, 2018, 03:47 PM   #3
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The two cams visually appear to be identical, base dia. and lift measure to be the same so I was wondering if the numbers can prove that the cams are original to the engines? I hit the nail due to all the great info from this website and also the husaberg.org web with the Husaberg Motorcycle Owners Doc info! Both cams have concave ramps which is something that I have never noticed previously, but may be related to the rollers in the rocker arms. It seems that the lobes would seriously whack the valves open. Does anyone have info on the actual numbers on the cams as to what year, type of power etc.? I will also be addressing the cam chain guides and tensioner issues as mentioned. I had already removed the kick actuated compressiuon release cable as I am very familiar with the manual lever, and I really don't see how the timing could be correct with the kick actuated/
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November 2nd, 2018, 03:05 AM   #4
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the code 49/00 means that the cam was made on the 49th week of 2000 and the mince pies were being passed around the factory!

there's barely any difference twixt the 53 cam and the 5521 but I'd have thought you could see a little in the flanks?

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