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Piston coding

Started by Bill Pine, September 18, 2020, 04:29:01 AM

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Bill Pine

September 18, 2020, 04:29:01 AM
Hi all,
Can anyone tell me what the wording and numbers mean on the underside of the piston.
Mine has:
ART, YAMAHA, 3 with What looks like an upside T above it
1TX00
Thanx Bill. 

krusty

#1
September 18, 2020, 05:24:37 PM
Quote from: Bill Pine on September 18, 2020, 04:29:01 AM
Hi all,
Can anyone tell me what the wording and numbers mean on the underside of the piston.
Mine has:
ART, YAMAHA, 3 with What looks like an upside T above it
1TX00
Thanx Bill. 
ART is the manufacturer.
Don't know about the #3.
1TX is model code = FJ1200'87
91 FJ1200
84 FJ1100 x 2
85 FJ1100
89 GL1500
76 CB750F1
72 CB350F
63 C92 x 2
59 C76
62 C100
63 C100
60 Colleda 250TA x 3
63 Suzuki MD50
77 DT125E
77 DT175E x 2
79 DT250F

Bill Pine

#2
September 18, 2020, 06:14:31 PM
Thank you for the help.
Now I'm not sure what I have as the bike is a 95 FJ1200.
Thanx again. 

fj1289

#3
September 18, 2020, 07:55:04 PM
87 was the first year the piston was redesigned to increase the displacement to 1200 (1188 cc actual).  So the pistons get "tagged" with the 1TX part number. 

If Yamaha doesn't change a part's design even when used on a new model, it usually retains the part number of the earlier model.  In other words - nothing hinky at all with your engine - no worries!

Bill Pine

#4
September 19, 2020, 06:02:35 AM
Thank you so much for the info it's greatly appreciated.
Regards, Bill
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