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- Sep 14, 2008
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- Up North Uk
pics and location please!
- Joined
- Nov 20, 2001
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- Ely, England
husa98 may well be right but there are many bikes out there with far earlier cases in them. so i suggest a photo lik armin does. you may have a very old engine in that later chassis.
regards
Taffy
regards
Taffy
- Joined
- Feb 19, 2003
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- Escondido, Ca. USA
It can't hurt to keep that swingarm bolt well lubricated and your motor mounts tight especially on 01 and below models.
Husa98 said:
I think the cases were actually modified in 03. My 02 501 suffered from the dreaded crack. Never heard of the problem on 2000 and and previous years which leads me to believe it was just an 01' and 02' flaw.
log
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logjump said:
believe me log, all the earlier cases were just as incapable. my theory is that if the front plates broke and were left long enough the poor old cases got it.
another very under estimated part that we never discuss here are the 'top hat' inserts in the back of the case that the SA pin goes through!
we replace the pins and dowels but we should be replacing the crankcase 'top hats' as well!
regards
Taffy
- Joined
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My 00 501 case cracked on the right side also at 272 hours, 7368 miles. Tore down engine and had the case welded. pictures are in my gallery.
116 hours later, it cracked again. Haven't removed the engine yet, but looks like it cracked in the same place again.
Joe
116 hours later, it cracked again. Haven't removed the engine yet, but looks like it cracked in the same place again.
Joe
- Joined
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RE: FX470E crankcase crack
Make sure you have a welder that knows what he's doing ! This is an alloy case it must be SPOTLESS before welding. All oil must be cleaned/purged this includes inside the crack itself. The two cases should be bolted together before welding the outside to insure no warpage, then when that is done it should be welded on the inside, paying attention to gear clearances on the inside. This is not a job for a "backyard" welder. Skilled personel only. Good luck
Make sure you have a welder that knows what he's doing ! This is an alloy case it must be SPOTLESS before welding. All oil must be cleaned/purged this includes inside the crack itself. The two cases should be bolted together before welding the outside to insure no warpage, then when that is done it should be welded on the inside, paying attention to gear clearances on the inside. This is not a job for a "backyard" welder. Skilled personel only. Good luck
my friend has a 2002 FC 470e and a thicker case.
Maybe they changed the case during the 2002 production.
Taffy: sorry for the disaccording.
When I told about the 501(2001): this was my former bike an is sold.
Actually i have a 550 (2006) since 2007.
Maybe they changed the case during the 2002 production.
Taffy: sorry for the disaccording.
When I told about the 501(2001): this was my former bike an is sold.
Actually i have a 550 (2006) since 2007.
Re: RE: FX470E crankcase crack
You are right, the case have to be warmed up in a oven.
He does that not.... I think one possible reason for the new crack
I gave him only the right side, there was no problem with buckling.
On the inner side I have to milling the welding for fitting the gear wheel.
Stoveguy said:
You are right, the case have to be warmed up in a oven.
He does that not.... I think one possible reason for the new crack
I gave him only the right side, there was no problem with buckling.
On the inner side I have to milling the welding for fitting the gear wheel.
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Re: RE: FX470E crankcase crack
Good points!
My dealer did the whole job, including the welding. He did not weld the inside. The case warped and had to be surfaced. The amount of material removed caused the transmission main shaft bearings to be axially preloaded and the clutch side bearing ribbon ball retainer failed in 19 hours.
No, he did not make good on it!
Joe
Stoveguy said:
Good points!
My dealer did the whole job, including the welding. He did not weld the inside. The case warped and had to be surfaced. The amount of material removed caused the transmission main shaft bearings to be axially preloaded and the clutch side bearing ribbon ball retainer failed in 19 hours.
No, he did not make good on it!
Joe
RE: Re: RE: FX470E crankcase crack
Thanks for all of the advice guys. I have stripped engine down and found a couple of gears with rounded dogs so an easy fix here. Cases had been welded before and not dressed properly so the swing arm pressured the weld build up and punched back through again. Pretty ugly really. I have a Miller Gold Star tig in my workshop so I know my way around ally welding but this repair does not appear to have much room for error so will vee the crack right through and get from both sides. I will also fill in and reboss the 6mm case screw just above the swingarm boss as this is an obvious stress raiser.
Cheers, Stu
Thanks for all of the advice guys. I have stripped engine down and found a couple of gears with rounded dogs so an easy fix here. Cases had been welded before and not dressed properly so the swing arm pressured the weld build up and punched back through again. Pretty ugly really. I have a Miller Gold Star tig in my workshop so I know my way around ally welding but this repair does not appear to have much room for error so will vee the crack right through and get from both sides. I will also fill in and reboss the 6mm case screw just above the swingarm boss as this is an obvious stress raiser.
Cheers, Stu
- Joined
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RE: Re: RE: FX470E crankcase crack
Stu, Not to beat a dead horse, but my guy stressed that the area being welded MUST be absolutely spotlessly cleaned of oil. My case was welded once before by someone who did not thouroughly clean hence it cracked again and needed re-welded. Got it done right the second time !
Stu, Not to beat a dead horse, but my guy stressed that the area being welded MUST be absolutely spotlessly cleaned of oil. My case was welded once before by someone who did not thouroughly clean hence it cracked again and needed re-welded. Got it done right the second time !
- Joined
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- SWEDEN
Re: RE: FX470E crankcase crack
I agree with Stoveguy, Also when you weld a crack is to find ist startingpoint and drill a hole in the end to stop the crack to spread and then weld everything.
Regards
Stoveguy said:
I agree with Stoveguy, Also when you weld a crack is to find ist startingpoint and drill a hole in the end to stop the crack to spread and then weld everything.
Regards
- Joined
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RE: Re: RE: FX470E crankcase crack
you need degreaser, steam, then direct flame to clean it properly
you need degreaser, steam, then direct flame to clean it properly
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