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Author Topic: Does this sleeve need to be replaced?  (Read 753 times)

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Does this sleeve need to be replaced?
« on: February 03, 2014, 02:29:06 pm »
Can this sleeve be honed or needs to be replaced? It's a 87 head with a small chip and crack near one of the ports other than that the sleeve it is really smooth. The crack protrudes out about 3 thousands of an inch and the chip does not protrude out. Just trying to save some money. Local shop wants $300+ to do a resleeve job. I have 2 pics posted at bottom. Thanks.
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2013 Suzuki KINGQUAD 400
2018 Yamaha YFZ450R

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Re: Does this sleeve need to be replaced?
« Reply #1 on: February 03, 2014, 02:57:36 pm »
Whenever I came across the bridge being broke I've resleaved. Was afraid of it making a hot spot or catching a ring. No sense in repairing with new parts and worrying of a fail or just to do it again. Not sure if there's a fix for it
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Re: Does this sleeve need to be replaced?
« Reply #2 on: February 03, 2014, 05:18:37 pm »
So you're saying to replace sleeve?
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Re: Does this sleeve need to be replaced?
« Reply #3 on: February 03, 2014, 05:45:02 pm »
Unless you want to catch a ring.
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Re: Does this sleeve need to be replaced?
« Reply #4 on: February 03, 2014, 06:07:43 pm »
So you don't think honing will smooth out the chip?
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Re: Does this sleeve need to be replaced?
« Reply #5 on: February 03, 2014, 06:28:34 pm »
Cut the bridge out all the 86 rms dont have bridges  there basicly the same cylinder as the lt if its ben ported real big u would want to resleeve it then

u can probly chanfer the chip in the port to keep it from catching the ring most builders will recomend a resleeve
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Re: Does this sleeve need to be replaced?
« Reply #6 on: February 04, 2014, 09:32:39 am »
DO NOT CUT THE BRIDGE OUT. That port will break the rings and swallow a  piston on a 250 engine. It is way too big.  A RM port is oval and narrower. The bridge is there to support the rings So they won't push and catch on the ex port. And the roof is flat adding to the problem.
No, honing will not fix it. It will ruin the rings. 
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Re: Does this sleeve need to be replaced?
« Reply #7 on: February 04, 2014, 01:11:51 pm »
Sleeves are readily available for the 87 250,s.My 87 sleeve **** on the bridge so had to get it resleeved.
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Re: Does this sleeve need to be replaced?
« Reply #8 on: February 04, 2014, 04:57:30 pm »
I found that its cheaper to buy a GOOD new top end
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Re: Does this sleeve need to be replaced?
« Reply #9 on: February 05, 2014, 01:50:33 pm »
Most heads I have found are around $500
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Re: Does this sleeve need to be replaced?
« Reply #10 on: February 05, 2014, 03:55:17 pm »
where you looking.
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Re: Does this sleeve need to be replaced?
« Reply #11 on: February 06, 2014, 06:29:07 am »
Not brand new just a good used one. You can find complete running motors for 800
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Re: Does this sleeve need to be replaced?
« Reply #12 on: February 06, 2014, 01:11:11 pm »
I have a complete cylinder piston and head here ready to go. Its nick Kimmels was for his build he sent it to me and the bottom end was toast. I need to send it back to him unless he sells it then send it wherever. Having heard from him in she come to think of it.
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Re: Does this sleeve need to be replaced?
« Reply #13 on: February 07, 2014, 09:52:13 am »
I am willing to buy a good running engine or buy a good top end head. I have about a $1200 budget on the engine.
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Re: Does this sleeve need to be replaced?
« Reply #14 on: February 07, 2014, 12:08:03 pm »
I have a complete small reed motor previous owner said bike is a 90' haven't had time to check. I will sell the whole motor cheap needs to be gone through clutch cover was off basket appears to haves broken finger and kick start gear is messed up pm me if you want more info
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