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Piston options Dt1 250

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Piston options Dt1 250 was created by Ace_1

Just wondering what the differences are between the early piston port pistons as opposed to the 74 and later pistons?? Wiseco does a 74 later kit.
15 Jun 2021 19:57 #1

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  • MarkT
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Replied by MarkT on topic Piston options Dt1 250

Biggest issue is windows in skirt.

Check with Enduronut. He likely has what you need. Or post here and someone else might.
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
15 Jun 2021 20:04 #2

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Replied by RT325 on topic Piston options Dt1 250

& even biggerer issue is gudgeon height difference.
16 Jun 2021 00:23 #3

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Replied by RT325 on topic Piston options Dt1 250

Now i'm sitting up & taking notice. Tell us more about ya bike. I expanded your pic & looks great in action. Tank looks RT2. What cylinder are you running, a piston port DT1mx cylinder or a DT1 GYT race kit chrome cylinder "like i stuffed running wrong ring against chrome, doh!!" Or did you port your original cylinder. If its a borable cylinder what size are you after, 70.?--i'll go searching.Sorry for the annoying questions. One more, where are you situated--i'm in NZ & see mud in the pic so looks like home to me.
16 Jun 2021 00:38 #4

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Replied by RT325 on topic Piston options Dt1 250

!mm "4th over in the first link.
Std one in the second
Couple of others but don't have rings which might be near impossible when it come to 6th over 1.5mm in one link
First over single rin DT1MX in last link but once again no rings. I see that one has K for keystone on top & by memory the rings from a two ring DT1 piston fit, so you end up with a spare ring. My memory a bit erratic thinking back50 years so double check!!.
Have a DT1MX cylinder on a tat bike relic of mine, although running a 360 crank just to confuse things but man it goes well. Must be 280cc or so--70x70. Ok, enough Bull S--.

NOS ART Yamaha DT1 DT-1 1.00 Piston Set Kit Rings Pin Circlips 214-11638-00
Buy It Now
Std Size Piston Kit For Yamaha 250cc Enduro DT1 DT-1 DT 1 Includes Rings Pin
Buy It Now
NOS Piston Kit Oversized +1.00mm Yamaha DT-1 214-11638-01 (no rings)
Buy It Now
NOS MC Brand Yamaha DT1 DT-1 1.50 Plain ART Piston Set Kit MC833 6th Oversize
Buy It Now
Yamaha DT1 DT1 MX 1969-71 NOS Piston 1st Over 285-11635-00
Buy It Now
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16 Jun 2021 01:01 #5

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Replied by RT325 on topic Piston options Dt1 250

sorry thought just links would come up, not take up lots of room.
16 Jun 2021 01:02 #6

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