facebook1 youtube1 twitter1 instagram linkedin1 pinterest1

NOTICE:  If you are not a free registered member of the site, you will not see the photos in the forum, and you won't be able to access our premium member content. Please consider joining our community! REGISTER AND MAKE THIS BOX DISAPPEAR!

1971 DT-1 MX autolube

  • lolipop50
  • lolipop50's Avatar Topic Author
  • Offline
  • Junior Member
  • Junior Member
  • Posts: 15
  • Likes received: 12

1971 DT-1 MX autolube was created by lolipop50

Today I got around to firing up the 250MX. Used pre-mix fuel so I knew it would be oiling while I checked to see if oil was arriving from the autolube pump to the intake. Yes there was oil arriving there but I wonder how much I should be seeing?? ( I just removed the banjo fitting at the intake to observe while the bike was running.) Still a considerable amount of good 'ol exhaust smoke also.
Thanks in advance for any replies.
Itching to give it a ride

This image is hidden for guests.
Please log in or register to see it.

12 Jan 2022 14:37 #1

Please Log in or Create an account to join the conversation.

  • Posts: 1100
  • Likes received: 342

Replied by asco on topic 1971 DT-1 MX autolube

Without changing Main Jet Size ADDING PREMIX makes the bike run Lean. Beware of Lean Running 2 Strokes.

I TUNE therefore I AM 

ASCO
YAMA-LAND RESTORATIONS, 818-521-2109 This email address is being protected from spambots. You need JavaScript enabled to view it. 1971 CT1-C (BRANDY) 1970 DT1-C (MONICA) 1973 100cc Hodaka Combat Rat (ABBY NORMAL) 1972 AT2M (ARNOLD ZIFFLE)
The following user(s) Liked this Post: Tinkicker
15 Jan 2022 11:31 #2

Please Log in or Create an account to join the conversation.

  • lolipop50
  • lolipop50's Avatar Topic Author
  • Offline
  • Junior Member
  • Junior Member
  • Posts: 15
  • Likes received: 12

Replied by lolipop50 on topic 1971 DT-1 MX autolube

   Thanks for that info on the main jets; will double check the auto-lube pump before taking it out for a ride, and then, if it's working correctly I'll rely on it for lubrication. Just an fyi: I have been using 95 octane racing fuel for all my small engines (chainsaws, weed-eaters, etc.) which I plan on using in the bike. This fuel supposedly has no added ethanols or other ingredients which degrade the fuel over time if not used right away.My other "baby" is a 1964 F-100 with the stock Y-block V8 so all this 2 cycle stuff is kind of foreign to me, I have rebuilt my truck engine and otherwise restored my truck to a good usable condition but when I look at some of the procedures for the Yamaha engine in my "Clymers" shop manual it seems to be more complex than an old school V8.Cheers
16 Jan 2022 11:40 #3

This message has an attachment image.
Please log in or register to see it.

Please Log in or Create an account to join the conversation.

  • Posts: 272
  • Likes received: 153

Replied by Ht1kid on topic 1971 DT-1 MX autolube

Hey Lolipop50 does your truck have the 292 or 312 y block. These old Yamaha’s are pretty simple once you get the hang of it. 
16 Jan 2022 17:17 #4

Please Log in or Create an account to join the conversation.

  • lolipop50
  • lolipop50's Avatar Topic Author
  • Offline
  • Junior Member
  • Junior Member
  • Posts: 15
  • Likes received: 12

Replied by lolipop50 on topic 1971 DT-1 MX autolube

 Hey Ht1kid: the V8 is a 292 in the truck.
The following user(s) Liked this Post: MarkT, Ht1kid, msavitt, Sneezles61
Last edit: 17 Jan 2022 12:34 by lolipop50. Reason: trying to add an attachment (picture)
17 Jan 2022 12:29 #5

This message has an attachment image.
Please log in or register to see it.

Please Log in or Create an account to join the conversation.

  • Posts: 11768
  • Likes received: 6969

Replied by MarkT on topic 1971 DT-1 MX autolube

Nice!!  Looks like a picture postcard scene of life in America.
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
17 Jan 2022 12:45 #6

Please Log in or Create an account to join the conversation.

  • Posts: 272
  • Likes received: 153

Replied by Ht1kid on topic 1971 DT-1 MX autolube

Looks great with your tag along trailer bet you get a lot of thumbs up!!!
17 Jan 2022 15:55 #7

Please Log in or Create an account to join the conversation.

  • Posts: 478
  • Likes received: 294

Replied by adguy2112 on topic 1971 DT-1 MX autolube

Love the Shasta! That fam is too many for one of those now but someday…
17 Jan 2022 16:06 #8

Please Log in or Create an account to join the conversation.

  • Posts: 25
  • Likes received: 7

Replied by my68dt1 on topic 1971 DT-1 MX autolube

I removed the auto line on my 68 onetime to see the feed rate. It isn't much. Good info on the main jet. Maybe that is why I stuck the new piston on my 69. Got to love those old Fords. I have two 65's one is a camper special, not as nice as yours. . Stan.
The following user(s) Liked this Post: Ht1kid
17 Jan 2022 16:17 #9

Please Log in or Create an account to join the conversation.

  • Posts: 272
  • Likes received: 153

Replied by Ht1kid on topic 1971 DT-1 MX autolube

Ford’s and Yamaha’s Thumbs up!!
17 Jan 2022 17:27 #10

Please Log in or Create an account to join the conversation.

Moderators: yamadminEnduronutMakotosunDEETVinnieDevinJames Hart