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Author Topic: Piston markings  (Read 2103 times)

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Offline craigclayton

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Piston markings
« on: September 04, 2016, 04:11:54 pm »
Have barrel off of rm 125 b, and wondering what the markings are on the piston, and what they mean

I45K7
55mm
432P2
CD.   

Please enlighten me
Cheers C
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74 Bultaco 250, 77 RM125b

Offline SUZUKI311

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Re: Piston markings
« Reply #1 on: September 04, 2016, 05:14:23 pm »
To me it looks like Wiseco markings, 55mm bore size, (std is 54mm) 432p2 is from memory Wiseco second oversize, CD is the type of rings applicable.
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Offline LWC82PE

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Re: Piston markings
« Reply #2 on: September 04, 2016, 05:15:28 pm »
Its a Wiseco, although 432P2 is 54.5mm. 55mm would be 432P4.
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Offline Suzukal

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Re: Piston markings
« Reply #3 on: September 04, 2016, 05:46:28 pm »
P2 - 54.50mm
P3 - 54.75mm
P4 - 55.00mm
P6 - 55.50mm
P8 - 56.00mm
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Offline craigclayton

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Re: Piston markings
« Reply #4 on: September 04, 2016, 07:10:44 pm »
Now have magnifying glass out and it is marked
I45K7
50 mm
432P2
CD
Sorry for the error, both piston and bore look good so ????????
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74 Bultaco 250, 77 RM125b
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