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post #1 of 9 Old 06-14-2010, 11:37 PM Thread Starter
 
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98 cbr 900rr

im in need of some help my crank bearing spun on my number 3 rod i had it all taken apart i took the crank in to a shop and had it welded and shaved down to stock size the oil pump was replaced new rod and berings well the bike lasted about 2-3 weeks and that was it the bearing spun on number 3 again can someone help me and tell me how to keep this from doing the same thing i would like to get it back on the road befor winter hits
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post #2 of 9 Old 06-15-2010, 5:33 AM
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Re: 98 cbr 900rr

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Originally Posted by zz23zztom View Post
im in need of some help my crank bearing spun on my number 3 rod i had it all taken apart i took the crank in to a shop and had it welded and shaved down to stock size the oil pump was replaced new rod and berings well the bike lasted about 2-3 weeks and that was it the bearing spun on number 3 again can someone help me and tell me how to keep this from doing the same thing i would like to get it back on the road befor winter hits

Did you clean out all the galleries before rebuilding the engine?
Did you check the crank runout and plastigauge the bearing clearances?

"I won't forget that ride for a while. Maybe you're right. Living fast might be worth the final crash. Maybe that's the secret you fliers know." - Flight of the Intruder
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post #3 of 9 Old 06-15-2010, 11:47 PM Thread Starter
 
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Re: 98 cbr 900rr

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Did you clean out all the galleries before rebuilding the engine?
Did you check the crank runout and plastigauge the bearing clearances?
i didnt rebuild it my self i payed some one to do it i do know that all the parts went threw the parts washing tank i highly doubt he used the plastigauge and i dont know anything about the runout i will call him tomorrow and ask those questions i know this time im doing it myself screw paying someone else the thing is i still oue him some money but i dont want to pay him he blamed it on me for not breaking the engine in for a mounth i call out bull **** on that
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post #4 of 9 Old 06-15-2010, 11:55 PM
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Re: 98 cbr 900rr

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i didnt rebuild it my self i payed some one to do it i do know that all the parts went threw the parts washing tank i highly doubt he used the plastigauge and i dont know anything about the runout i will call him tomorrow and ask those questions i know this time im doing it myself screw paying someone else the thing is i still oue him some money but i dont want to pay him he blamed it on me for not breaking the engine in for a mounth i call out bull **** on that

Were you riding hard or just cruising around?
You've already pulled it apart to check the bearing?
Is the crank intact where it was welded up?

"I won't forget that ride for a while. Maybe you're right. Living fast might be worth the final crash. Maybe that's the secret you fliers know." - Flight of the Intruder
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post #5 of 9 Old 06-16-2010, 7:12 AM Thread Starter
 
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Re: 98 cbr 900rr

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Were you riding hard or just cruising around?
You've already pulled it apart to check the bearing?
Is the crank intact where it was welded up?
i pulled the oil pan off and took a look so far the crank looks to be intact i put about 700 miles on it then after that i road it hard
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post #6 of 9 Old 06-16-2010, 8:54 AM
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Re: 98 cbr 900rr

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Originally Posted by zz23zztom View Post
i pulled the oil pan off and took a look so far the crank looks to be intact i put about 700 miles on it then after that i road it hard
Did the oil come out clean?
Has the bearing spun or collapsed or is it just worn?
Are the crank or rod blue or black from heat?
You rode it hard but still within the normal safe limits for the engine?
What exactly was damaged and replaced in the engine when it went last time?
Did you change the oil sometime within the first few miles or did the mechanic run the engine in and change the oil before you picked it up?
When you get it apart you'll have to measure _everything_ and make sure all the galleries are clear of any debris.

"I won't forget that ride for a while. Maybe you're right. Living fast might be worth the final crash. Maybe that's the secret you fliers know." - Flight of the Intruder
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post #7 of 9 Old 06-16-2010, 4:50 PM Thread Starter
 
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Re: 98 cbr 900rr

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Originally Posted by bladeracer View Post
Did the oil come out clean?
Has the bearing spun or collapsed or is it just worn?
Are the crank or rod blue or black from heat?
You rode it hard but still within the normal safe limits for the engine?
What exactly was damaged and replaced in the engine when it went last time?
Did you change the oil sometime within the first few miles or did the mechanic run the engine in and change the oil before you picked it up?
When you get it apart you'll have to measure _everything_ and make sure all the galleries are clear of any debris.

i dont think the oil got chaged it was black the bearing spun destorying the crank and rod the same thing that happend last time so there was already color to the crank the things that were replaced were the oil pump connecting rod bearings and the crank shaft went into a shop and was fixed
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post #8 of 9 Old 06-16-2010, 10:09 PM
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Re: 98 cbr 900rr

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Originally Posted by zz23zztom View Post
i dont think the oil got chaged it was black the bearing spun destorying the crank and rod the same thing that happend last time so there was already color to the crank the things that were replaced were the oil pump connecting rod bearings and the crank shaft went into a shop and was fixed

Black oil in 700 miles?
Or do you mean it didn't even have new oil after the build?
Do you do burnouts at all?
If the crank was already showing colour it shouldn't be used in my opinion.
You said the rod was replaced as well?
So the engine was totally stripped down?

"I won't forget that ride for a while. Maybe you're right. Living fast might be worth the final crash. Maybe that's the secret you fliers know." - Flight of the Intruder
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post #9 of 9 Old 06-16-2010, 10:20 PM Thread Starter
 
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Re: 98 cbr 900rr

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Originally Posted by bladeracer View Post
Black oil in 700 miles?
Or do you mean it didn't even have new oil after the build?
Do you do burnouts at all?
If the crank was already showing colour it shouldn't be used in my opinion.
You said the rod was replaced as well?
So the engine was totally stripped down?
no it had new oil in it the bike burned oil to witch it didnt befor but i know why that is i never did a burn out after the motor was rebuilt and yes the motor was completly striped down
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