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Makotosun

Which piston is this?

  • pabdt
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Which piston is this? was created by pabdt

I just picked up a 360 DT engine and started disassembling it to check things over and clean it up. Cylinder and piston/rings/looked good.   
The poor engine was out to pasture with literally 29 other bikes.
 
I'm wondering which piston this is. the piston/rings appear in great shape.  Apparently 0.5mm over by stampings.
Has 1 ring.  

No Yamaha markings, but a 36501 on inside of piston.

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1974 Yamaha DT125A
1974 Yamaha DT360A with SP96 Exhaust
Next…196x-197x Yamaha something.
19 Oct 2025 16:41 #1

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  • MarkT
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Replied by MarkT on topic Which piston is this?

MX360
 
1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250
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19 Oct 2025 16:59 #2

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Replied by pabdt on topic Which piston is this?

Thanks for the info.   I asked him for a carb and he apparently stuck a 415 00 on it. 415 Product code shows Euro dt175???? 1973?  Same as USA 74? No 175s at my house….yet 

i think i got shorted on carb. 
1974 Yamaha DT125A
1974 Yamaha DT360A with SP96 Exhaust
Next…196x-197x Yamaha something.
19 Oct 2025 18:23 #3

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Replied by MarkT on topic Which piston is this?

175 carb would be a smaller body than 360 carb.  I doubt the manifold would even tighten down that much?

Anyway, seems unlikely you'd find a rare Euro DT175 carb laying around in the US.  Other manufacturers used Mikuni and those codes could be for a Suzuki model or something?  
1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250
19 Oct 2025 22:25 #4

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