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Post subject: TKR pistons, any good?
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jante350  RD/RZ Jedi Master Joined: 05 Aug 2003 Total posts: 5220 Location: Bergen, Norway |
Are these pistons any good compared to stock quality?
http://i5.ebayimg.com/02/i/03/89/1d/6f_1_b.JPG
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Posted: Mon Mar 07, 2005 10:57 am
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SEB4LO All-gear Wheelie! Location: FRANCE - QUIMPER |
Some people will be hurt but :
SAME CASTING AS PROX=TKR=OEM
look at them closely , i ve had one set of each in my hand , EXATLY the same casting ....... think they are the same thing , except ring are sometimes differents .
you can go for them , no pb , just one thing , there is an expander , forget it , it s crap .....
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Posted: Mon Mar 07, 2005 11:11 am
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hybrid Rear-wheel Steering! Joined: 07 Aug 2003 Total posts: 2591 |
I used some in my LC I think.
I too was told by the guy that they were the same as the OEM pistons.
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Posted: Mon Mar 07, 2005 12:41 pm
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z1100r  Ace of Spades Joined: 05 Aug 2003 Total posts: 4745 Location: Coventry |
If they have '31K' inside them .... they are the same castings again as the good old Shitakas. Its dead easy to tell a Shitaka, PROX, or any other Marketing outlet for these piston, against an original ART piston... look at the inlet windows from the inside. The Mitaka type are sort of individually framed with a bulbous ridge, the stock ART (note ART) are just a plane rough cast porus looking surface across both holes, well all the ones I've seen are..... 
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Posted: Mon Mar 07, 2005 1:16 pm
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SEB4LOAll-gear Wheelie! Location: FRANCE - QUIMPER |
any picture is welcome , i don t understand what he says 
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Posted: Mon Mar 07, 2005 1:30 pm
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z1100rAce of Spades Joined: 05 Aug 2003 Total posts: 4745 Location: Coventry |
Let me put it this way SEB....every aftermarket Japanese made piston you buy for a valve is made by one Japanese company...probably based in Taiwan.....These pistons are then sold to companies like PROX, Mitaka, TKR, blah blah blah, who put them in there own box and sell them. Sometimes it goes even further and PROX will sell them to another company who put them in their box and sell them.
However none of them are OEM pistons....you can only buy those from Yamaha and they are made by ART....they have Art written in them above the gudgin pin hole somewhere I believe and do not have '31k' written or cast in anywhere. They only come in white YAMAHA boxes...and cost twice as much as the others.....wether they are twice as good is another matter.. 
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Last edited by z1100r on Mon Mar 07, 2005 1:56 pm; edited 1 time in total
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Posted: Mon Mar 07, 2005 1:39 pm
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SEB4LOAll-gear Wheelie! Location: FRANCE - QUIMPER |
won t debate here , i put expander ring and nobody noticed
so , will strip one of my engines soon and there are OEM in , i have some sets of PROX somewhere , will look at them more closely than i ve ever done
but i don t matter I USE WISECO
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Posted: Mon Mar 07, 2005 1:47 pm
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z1100rAce of Spades Joined: 05 Aug 2003 Total posts: 4745 Location: Coventry |
I'll take a piccy of each type tonight as I have loads of each lying about....
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Posted: Mon Mar 07, 2005 2:00 pm
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z1100rAce of Spades Joined: 05 Aug 2003 Total posts: 4745 Location: Coventry |
heres the piccies I promised....
Mitaka left and OEM right...
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Posted: Mon Mar 07, 2005 11:42 pm
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jante350RD/RZ Jedi Master Joined: 05 Aug 2003 Total posts: 5220 Location: Bergen, Norway |
Bought the b*stards anyway, will let you know how it works out!
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=7958558377&ssPageName=ADME:B:EOAB:US:6
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Posted: Wed Mar 09, 2005 10:13 pm
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SEB4LOAll-gear Wheelie! Location: FRANCE - QUIMPER |
OK , understand what you where talking about , but don t remember mine are like that ( prox and TKR ) will look at them and post pics too 
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Posted: Thu Mar 10, 2005 7:49 am
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jlyon Mmm, Fully Synthetic! Joined: 13 Aug 2003 Total posts: 1181 Location: South Yorks. |
| z1100r wrote: |
<SNIPPED>
They only come in white YAMAHA boxes...and cost twice as much as the others |
JL - Not entirely true. Many years ago, I bought genuine ART piston kits in ART boxes for significantly less than the cost of Yamaha pistons.
Unfortunately, the shop I bought them from has disappeared, & I suspect the guy retired.
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Posted: Fri Mar 11, 2005 1:40 pm
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