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main bearing failure

M

madpugs

Joined Apr 2008
13 Posts | 0+
yarrawonga, vic, australia
hi guys and gals,
I know there is a thread about this but im more interested in how many people have actually had dramas concerning these bearings.Is it a major issue or been blown out of proportion? Ive recently purchased an 04 fe 550 so am wondering if it is an issue. I would prefer to here from people who actually have these bikes, not the ones who know a bloke who knows a bloke etc
Cheers
 
my 06 fe550 did the main bearings, bike had 80 hours, 3900kms, caused damage to sleeve, piston, rings, cost of repair was AU$2300 luckily repaired under warranty.
 
it was an australian 550 problem!!!!

mudplugs: i can guess you're from the Uk but whereabouts?

regards

Taffy
 
Love the 04's
My 2004 550 has 335hours+ and over 9000 miles. Replaced worn cam chain and a few seals and thats it. The 2004 650 I sold has almost 7000 miles and has been flawless. Change oil and air filter often and dont be bouncin of that rev limiter all the time. Good luck.
cheeseberger
 
Good words of advice cheeseberger about the rev limiter. It's why I dont let just anyone ride my berg. Clean airfilter & oil will keep that berg running for longer & personnally I change my oil at 5hr intervals with oil filter changes at 10hrs.
 
thanks for the input, lm actually in australia but have trouble understanding why the aust models had a problem and not other countries.
 
That would have to be because of the better riders here in Oz testing the limits of the machines more often !!! Ha ha lol.
 
madpugs said:
thanks for the input, lm actually in australia but have trouble understanding why the aust models had a problem and not other countries.
Click to expand...

thats because you aussies are just coming into season (bitches heh!) whereas the rest of us are going into hibernation.

fritz und hans ver having ze bad day in ze office und got a slappen after ze virst 200 hat bin built!

no jokes about something happening at dawn .....

regards

Taffy
 
And all you boys who are trying to find the rev limiter well there ain't one. Ran a Kokusan system this morning on the rig took it to 12000 rpm still sparking like a goodun.

Any body that is interested in the advance curve it starts at 3000 and is smooth and progressive through to 7000 25 Degrees in total revs on to 9500 with no further advance.
This was a 550 ignition.

Regards

Sparks.
 
Sparks,
Can you figure out a way to connect a TPS to the CDI and twist the TPS shaft while testing? I would like to know what amount of change is due to the TPS and what difference it has at max and min settings.

As a reward for this exercise I have an business idea for you - please make a little rev limiter gizmo we can clip on the bike and adjust the limit.
 
Neil_E. said:
Sparks,
Can you figure out a way to connect a TPS to the CDI and twist the TPS shaft while testing? I would like to know what amount of change is due to the TPS and what difference it has at max and min settings.

As a reward for this exercise I have an business idea for you - please make a little rev limiter gizmo we can clip on the bike and adjust the limit.
Click to expand...

Hi Neil,

Yes I know what you are getting at and I was going to try this experiment, as you know I don-t run the TPS I just had it unplugged but when I removed it from the carb and plugged it in when on test no reaction the TPS is US.
So if there is any body out there that can donate one just for this test it would be most appreciated.

As for the limiter Neil I don-t know if this can be done by just hooking some thing up on the out side, might have to be done internally, I am not that electronically talented.
I once raised the rev limiter on the first of the GXR-s 750-s but you could actually buy a race cdi with this mod, so all I did was to find what they did and it was just two resistors, cheap fix for an expensive cdi box.

Regards

Sparks.
 
Madplugs, good question about why in Aus more than anywhere. ( & great reply Cafey18 ) I am starting to believe its bearing clearances (or lack of) & thermal expansion. I dont know $hit about rebuilding them but heat is the only thing we have more of really.
 
only thing we have more of really.[/quote]

You guys down under seams to have more of ,snakes, spiders,rabbits,croocs and kangaroo SxxT. Than we do up-north, Maybe its the draft from the mighty husaengine that suck up that kind off stuff Down-there :D

Regards
 
You guys down under seams to have more of ,snakes, spiders,rabbits,croocs and kangaroo SxxT. Than we do up-north, Maybe its the draft from the mighty husaengine that suck up that kind off stuff Down-there Very Happy
Click to expand...

haha,
or maybe it´s because they´re Aussies riding it upside-down at down under? 8O
 
So is upside down and downunder a double negative that makes it the right way up?
 
It wasn´t meant negative,
but I think you´re right about the double negation
 
It seems that a quite common problem is a misaligned crank. Some of the more serious racers (at least here in Finland) take their brand new engines apart and straighten the crank. I had a similar problem, I thought I was riding a Harley, the bearing showed signs of moving around and the crank measured .08 and .07 off. Some hammering and a new bearing and voilà, it runs beautifully. Some people straighten the crank and weld it as a more permanent fix.

-Hannu
 

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