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Author Topic: whats this head off  (Read 1567 times)

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Offline LWC82PE

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whats this head off
« on: August 24, 2009, 09:09:37 pm »
Big bore Yamaha head marked 5X600

« Last Edit: August 24, 2009, 09:19:33 pm by LWC82PE »
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Wanted - 1978 TS185 frame or frame&motor. Frame # TS1852-24007 up to TS1852-39022

Offline holeshot buddy

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Re: whats this head off
« Reply #1 on: August 24, 2009, 09:26:36 pm »
peewee 50

no its a yz490j 1982

cheers rusty
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Offline frostype400

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Re: whats this head off
« Reply #2 on: August 24, 2009, 09:27:20 pm »
got the donk to go with it Leith?
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Offline LWC82PE

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Re: whats this head off
« Reply #3 on: August 24, 2009, 09:29:25 pm »
No Frosty.
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Offline paul

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Re: whats this head off
« Reply #4 on: August 24, 2009, 09:32:04 pm »
5x6 may bee yz 490 k
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Offline Viper666

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Re: whats this head off
« Reply #5 on: August 25, 2009, 09:40:38 am »

Definitely 1982 YZ490J but will fit a YZ490K as well as IT490K & L. With the last three though the combustion chamber and squish design will be slightly different but I would not think enough to make any big difference in performance or reliabilty either way.

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Offline LWC82PE

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Re: whats this head off
« Reply #6 on: August 25, 2009, 07:42:04 pm »
thanks guys for your help
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Offline caps 999

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Re: whats this head off
« Reply #7 on: August 25, 2009, 08:46:02 pm »
definitly 490 j

all 82 models use the 5x prefix
eg 250j 5x5
125j 5x4
80j 5x2
etc
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Offline holeshot buddy

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Re: whats this head off
« Reply #8 on: August 25, 2009, 10:21:33 pm »
must be a 490 j then ;D ;D ;D
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