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Picture Attachments Fixed? (18 Feb 2023)

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Gas to oil premix ratio

  • Aintnothintoitbuttodoit27
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Gas to oil premix ratio was created by Aintnothintoitbuttodoit27

I have a 1978 Yamaha dt250 that I use for ice racing someone on here once gave me a ratio and I’ve since lost the number and haven’t ridden in almost 2 years taking the bike out this weekend but I need to mix some fuel can anyone help? 
06 Jan 2023 15:21 #1

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Replied by automan on topic Gas to oil premix ratio

can't go wrong with 20/1
40/1 is power mix in cold weather

cliff
The following user(s) Liked this Post: Aintnothintoitbuttodoit27, Crazy Horse 124
08 Jan 2023 10:17 #2

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Replied by asco on topic Gas to oil premix ratio

Jetting at high altitude plays a more important role than mixing ratios.

a
YAMA-LAND RESTORATION,
( 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 ) 1972 AT2M ( ZIFFLE) 1970 CT1-B ( HULK ) 1971 DT1E
( GINA ) 1970 CT1-B ( CLIDE ) 1968 DT1 ( WILSON )
08 Jan 2023 13:01 #3

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Replied by Aintnothintoitbuttodoit27 on topic Gas to oil premix ratio

I meant to add that I thought 20:1 sounded right and you and everyone else has pretty much said the same thing can’t go wrong with it! Thank you for the response. 
08 Jan 2023 13:28 #4

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Replied by DaveHunter on topic Gas to oil premix ratio

Mine are run with lots of oil, we have metal rubbing against metal in there under high temperatures /RPM speeds / friction…my grandfather used to say grease is cheeper than steel …..   What about power ….there was an article from a bike magazine & I think it is in the library here of a dynometer test using different oil ratios. The most horsepower was at a ratio of 16/1.  
Yes that was from years ago so gas was different and oil too but until someone does actual tests I’ll run a mix non synthetic 20/1
 
 
 
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08 Jan 2023 19:03 #5

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