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DT2 cylinder alternatives

  • Jogar
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DT2 cylinder alternatives was created by Jogar

Howdy all, 

I’m in the process of splitting my cases on my seized DT2 bottom end. It didn’t come with a jug, and I fear I may have to replace the crank rod anyways cause it’s rusted in place (I think).

are there any interchangeable jugs for the DT2? If so, is there anything I should be weary of / change while I’ve got the bottom end open? 

thanks! 

 
1973 Yamaha RT3
1973 Yamaha CT3
1972 Yamaha DT2
1969 Yamaha AT1
1964 Honda CT200
15 Apr 2023 15:15 #1

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Replied by RT325 on topic DT2 cylinder alternatives

Not really, just DT2 or DT3. Or DT1 if you wanted to change the rod to a longer rod. Or if you wanted to wheely off into the sunset--a YZ250A or B.
The following user(s) Liked this Post: 1971DT250, Ht1kid
15 Apr 2023 15:25 #2

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Replied by 1971DT250 on topic DT2 cylinder alternatives

Several cylinders on eBay. Some used, some new. Correct part # is 311-11311-01-00. Some of the eBay listings are incorrect. The DT2MX and DT3MX is different. RT2 and RT3 also different. Used ones will likely need to be rebored to a matching oversize piston and rings.
The hours spent riding my Enduros is not deducted from my life span.
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15 Apr 2023 15:43 #3

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Replied by RT325 on topic DT2 cylinder alternatives

Yes DT2MX "72 will fit that i'd not thought of. DT3MX doesn't exist. In "73 they went MX250 which is a total motor change. I guess we're meant to be sticking to trail cylinders? lol. Me gettin carried away--or should be at times.
The following user(s) Liked this Post: MarkT, Jogar
15 Apr 2023 15:48 #4

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  • Jogar
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Replied by Jogar on topic DT2 cylinder alternatives

I mean, wheelies off into the sunset are always preferred haha
1973 Yamaha RT3
1973 Yamaha CT3
1972 Yamaha DT2
1969 Yamaha AT1
1964 Honda CT200
15 Apr 2023 16:09 #5

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  • Jogar
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Replied by Jogar on topic DT2 cylinder alternatives

Any tips for splitting the case? If it’s seized (hard to know without getting in first) what are the usual suspects that need new parts? I’m guessing bearings and seals… 
1973 Yamaha RT3
1973 Yamaha CT3
1972 Yamaha DT2
1969 Yamaha AT1
1964 Honda CT200
15 Apr 2023 16:11 #6

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Replied by RT325 on topic DT2 cylinder alternatives

Here's a randon DT1 video i just googled & found & is very good & clear. If you want a slower look you can reduce youtube to .25 speed. It's all very relevant to your DT2 except your selectors in the transmission will have three selectors on shafts instead of one wrapped around the drum. Must admit i skipped through it a bit but should be very helpful.
www.google.com/search?q=yamaha+dt1+engin...446f,vid:C-WtZ1VrAFM
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Last edit: 15 Apr 2023 18:11 by RT325.
15 Apr 2023 18:09 #7

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Replied by hcdiiiga on topic DT2 cylinder alternatives

What is he doing at 17:59 in that video? Is he measuring between the spacer and gear with a feeler gauge?
16 Apr 2023 05:21 #8

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Replied by MarkT on topic DT2 cylinder alternatives

Not sure if this will work, Service Bulletin 259 on gear shimming and notes from Lyn Garland.  (most people don't bother with shimming trans)

 
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
The following user(s) Liked this Post: Enduronut
16 Apr 2023 07:50 #9

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Replied by yamayeeha on topic DT2 cylinder alternatives

Hi Mark
Is this in the tech library? If so I seem to be missing it
Thanks
Ian
16 Apr 2023 15:19 #10

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