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Old 05-17-2011, 11:27 PM
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Default 99 cr250 locked up.

     

i got i 99 cr250. i always keep up with changing the oil, cleaning air filter lube chain ext..... now one day i was riding hard and out of no where my bike lost power and shut off. i was about to kick start it when i noticed the motor had locked up. week later i drained the oil and i didnt see no metal shavings. so i took the motor out. took the top end off and there was alot of metal shavings but coming from the crank. and i tried spinning the crank but it was locked up. can anyone help me and give me advise on what could of caused that too happened?? and the crank is the orignal one never been replaced?? and would it be a good idea to replace everything??? another thing the shavings looked like copper, gold/copper color.....
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Old 05-18-2011, 05:48 AM
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Being that age it was bound to happen sometime. When you drained the tranny fluid you shouldnt see any shavings, the crank has no part of that. Can you move the rod? If i were you i would do a new crank and new bearings and seals,top end. The copper color shavings would be from the big end of the rod. The cause, it just happens. All motors eat up a crank at some point.

---------- Post added at 04:48 AM ---------- Previous post was at 04:47 AM ----------

Also what are you mixing your gas at?
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Old 05-18-2011, 04:02 PM
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ok yea im doing the whole top end, and bottom end. and i use the honda HP2 100% synthetic 2 stroke oil. size is 1 pint. and i mix it with plus/premieum gas 4 Gal with the 1 pint of oil.or am i mix it right?? i heard its better to go with a little bit of gas like 3 3/4??
wat would be a good mixture???? and thanks for helping out

---------- Post added at 04:02 PM ---------- Previous post was at 03:54 PM ----------

and the rod isnt locked. i can move it but the crank is locked up.
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Old 05-18-2011, 09:06 PM
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32:1 is a good all around mix. I have had good luck with amsoil dominator oil or klotz R50. Good luck on your rebuild

---------- Post added at 08:06 PM ---------- Previous post was at 08:01 PM ----------

and 32:1 would be 16oz oil for 4 gal of gas
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Old 05-19-2011, 12:24 AM
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ok so i was doing good on the mix then, well again thanks for the help,....
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