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!

Adjusting height on Mikuni VM24-512

  • ksours
  • ksours's Avatar Topic Author
  • Offline
  • Premium Member
  • Premium Member
  • Posts: 128
  • Likes received: 23

Adjusting height on Mikuni VM24-512 was created by ksours

The Mikuni specs say the float height should be at 21mm. Measuring from the gasket surface , is it the top of the float sitting natural in the upside down position? I have very little gas in the bowl when I pulled it and the measurement is 28mm. I want to use the clear tube but would like to adjust first to reduce the trial and error. See pic.
16 Oct 2021 09:15 #1

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: 10951
  • Likes received: 6387

Replied by MarkT on topic Adjusting height on Mikuni VM24-512

Are you sure the floats aren't on upside down or something?  That looks way off.

Rule of thumb on Mikuni is float arms should be parallel to float bowl gasket surface.
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
16 Oct 2021 09:58 #2

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

  • ksours
  • ksours's Avatar Topic Author
  • Offline
  • Premium Member
  • Premium Member
  • Posts: 128
  • Likes received: 23

Replied by ksours on topic Adjusting height on Mikuni VM24-512

Funny you should mention that. I wanted to button it up last night and noticed tension when setting on the bowl. This morning I found the floats upside down and figured I threw the tang out of measurement at that time. I did not hear from anybody so I adjusted to 21MM on both sides and the bike runs very well. The 30 pilot jet you recommended is in and I went back to standard Mikuni adjustments ( 1 turn out on the air/mix and adjusted the idle to @1700 with the needle adjustment back to 4). It has a small sputter at around 50-60%. I'm going to put a couple of miles on it and check the plug.
16 Oct 2021 10:22 #3

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

  • Posts: 6842
  • Likes received: 2539

Replied by RT325 on topic Adjusting height on Mikuni VM24-512

Just looked at the pic & thought can't be upside-down because of where the arm comes off the float but sure looks very bent up or something.
16 Oct 2021 23:16 #4

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

  • Posts: 6842
  • Likes received: 2539

Replied by RT325 on topic Adjusting height on Mikuni VM24-512

Oh, she all sorted, that's good.
16 Oct 2021 23:17 #5

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

Moderators: yamadminEnduronutMakotosunDEETVinnieDevinJames Hart