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June 6th, 2009, 11:37 AM   #1
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FC470 Bummer

Hey guys, as you may know I just picked up an '02 FC470. I bought this bike over the phone and was told it ran but was making a clattering sound. It was delivered Wednesday night but I only tried starting it this morning. Nothing. Not even a fart or backfire. Decided to pull the plug and check for spark. Nothing. I took the plug and checked it on my XR650R and it sparked no problem. The stator has evidently been changed because the wiring under the tank has been spliced into and there appears to be two extra yellow wires going nowhere from it. Charging circuit maybe?
Also, I got to looking around at the engine really close and much to my dismay, the right hand maincase is cracked at the swingarm pivot.
Oh well. Looks like I REALLY have my work cut out for me!
I'll post some pics of this thing later.

Sorry mods, I really didn't know where to post this, so if it's wrong please move it. Thanks.

Bruce
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June 6th, 2009, 11:40 AM   #2
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The 2 yellow wires are for the lighting coil I believe. Yes the FC's came with a lighting coil.
The case is a common problem and can most likely be welded by a competant welder.

Good luck!!
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June 6th, 2009, 05:15 PM   #3
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Thanks for the luck berger, I'm gonna need it. lol
Here's a couple sunlit glaring pics. I'll take more when I begin the teardown.

[img][/img]
[img][/img]
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June 6th, 2009, 07:04 PM   #4
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Originally Posted by berger
The 2 yellow wires are for the lighting coil I believe. Yes the FC's came with a lighting coil.
The case is a common problem and can most likely be welded by a competant welder.

Good luck!!
What causes that crack? Bottomin' out, jumping are just a flaw?

Daniel
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June 6th, 2009, 11:20 PM   #5
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Originally Posted by danielsfc501
Originally Posted by berger
The 2 yellow wires are for the lighting coil I believe. Yes the FC's came with a lighting coil.
The case is a common problem and can most likely be welded by a competant welder.

Good luck!!
What causes that crack? Bottomin' out, jumping are just a flaw?

Daniel
A combination of a weak spot in the casting and bottoming out. A siezed swingarm bolt will do it too. You usually only see it on 01's and early 02's.
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June 7th, 2009, 10:29 AM   #6
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i was going to say ken, the '02 had strengthened cases there, i think it's that old story of "a few very early '02s might have had the earlier cases to clear the stock"! otherwise i think it's fair to say it was just an '01 problem. and brucifer, you might think of a set of '02 or '03 cases but i'm afraid they'll be rare coz owners were running con rod alley and they are much sought after!

regards

Taffy
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June 7th, 2009, 11:55 AM   #7
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There's a guy selling a motor on ebay here in the states. Unfortunately, it's been in a fire. Looks to me that it's an '01+ 470. Would it be worth getting? Or would I just be spending money where it's not needed?

http://cgi.ebay.com/ebaymotors/ws/eBayI ... MEWAX%3AIT
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June 7th, 2009, 03:04 PM   #8
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Probably better off fixing what you have. On the other hand, a new piston and ring set is well over $200.
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June 7th, 2009, 07:27 PM   #9
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Yeah, you're right. Thanks berger.
Well, I checked the resistance in the stator and naturally it's not within spec. Checked the valves and they were all too tight. Pulled the rocker cover to eyeball the valve train. It has the alloy cam sprocket (in good shape). Cam chain is tight. Rocker arms and rollers look to be in good shape. The auto decomp looks good and functions well. The cam, not so much. The intake lobe is going away. Pitting and starting to groove.
That's it for now.
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June 8th, 2009, 12:45 AM   #10
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check those inlets for tuliping!!!

also, if the tappets are tight and the cam is going south then i can't see how those little CFBs have survived. ok they may but i would knock the pins out 1/2 way and look for a dull grey look or spalling underneath.

agree with ken, weld these cases. you defo have an'01 or an early '02 engine because of that alloy sprocket.

regards

Taffy
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