OzVMX Forum
Marque Remarks => Yamaha => Topic started by: Tossa on May 17, 2017, 02:07:02 pm
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Mate running a 250 at 25:1 using Castrol TTS synthetic
I have been running my bikes at 40:1 (not IT)
Just wondering what everybody else is running ratios and plug. Just think 25:1 with synthetic might cause problems, but i could be wrong
Barry
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Tossa - this will open the old can of worms and run for many pages if history repeats!!!
25:1 should not be a problem - but then neither is 40:1 :)
Doesn't help much thought does it?
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Tossa - this will open the old can of worms and run for many pages if history repeats!!!
25:1 should not be a problem - but then neither is 40:1 :)
Doesn't help much thought does it?
can you be he;pful for once, cheers Rossco
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most synthetics can be run happily at 40:1.
25:1 is fine, just a waste of oil to a degree...smokey as well. the newer oils work better at the higher ratios...
in synthetic two stroke oils, they are using a light base or a deep base . light bases are used by the most common oils and 30 - 50: 1 is the leanest I would run these oils. motorex fully synthetic is a deep base oil and I have run this quite successfully with no issues at 100:1 in the new kato, the old husky and all the powered tools in the shed. id still be using but the kato shop closed and I love the smell of the castor 727...
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That'd be 927
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thanks guya. My thought were towards the 40:1 with new age oils and fuels
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if it does help Baz - I have run my YZ on 40:1 Silkolene synthetic for years now and never had an engine issue.
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Search the forum as it has been done before with many good ideas and replies for and against many methods. I run mineral oil at about 30 to 1 as I believe it helps transfer heat better in air cooled bikes.
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I run my bikes at 40:1 and had no problems, just wondered why he would run at 25:1 with fully synthetic. Ah well when i pick it up tomorrow I'll change to what i run in everything else. thanks for your input
Barry
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Run my IT"s and YZs at same ratio as 1st post with same oil.
Have for 20 years.
Cheers
Kim
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http://forum.ozvmx.com/index.php?topic=13351.60
Interestingly 20:1 through 33:1 seems very popular in above thread. What advantage does running 50:1 have?
Makes no difference to jetting once you jet for a ratio you use.
Thicker oils such as Motul 800 are meant for leaner ratios as they have a heavier base.
Run 25:1 TTS no smoke, no plug problems in air cooled bikes
Use TTS at 32:1 as recommended by Yamaha in '05 YZ250.
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I used tts at 30:1 in a kdx years ago with no dramas and then had a lc husky and I used silkolene at 50:1...everyone was in shock...ran like a dream, crisp, no pooh at the pipe...I used the silkolene pro at one meet which had octane booster in it. was expensive but dealer was out of std stuff so he gave me a bottle for the same price. it was in the last drum at the final fuel stop and about 10 kms into the last section the bike suddenly took off with a noticeable kick in the pants...was impressive but not on my budget at the time.
your safe as houses at 40:1
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I have a small variety of 2 stroke bikes ;
All run on:
BP 98 ( my preferred choice ) fuel
All mixed on Castrol TTS Synthetic oil ;
Vintage (air & w/cooled ) @ 32:1
Modern bike @ 40:1
Same oil used in 1 modern auto- lube bike as well;
Chain saw / trimmer / mowers get the surplus pre mixed fuel .
One brand of 2 stroke oil for all ; one choice of fuel for all
Tuned right ; All run clean ;
Regards ,
Steve
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The oil manufacturer recommends the ratio to run their oils at.....
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I have run both my 74 HuskY Mag250 and my 79 WR250 at 40:1 using TTS with no problems at all. That is using 98 fuel
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Use 32.1 TTS she will be sweet...trust me Baz this will blow smoke right in Lexs smug face 8)
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An engine must be lubricated, I have never blown up motor, always used a fuel mix of 25.1. never had a problem.
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always use a quality oil...ive run 100:1 ..never had an issue ;D hardly make any smoke....
in summary I rekon this is a good rule of thumb...
pre 78 --25:1 mineral
a/c post 78 --25:1 mineral - 40: 1 synthetic
L/c 40:1 synth.
how does that sound??
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always use a quality oil...ive run 100:1 ..never had an issue ;D hardly make any smoke....
in summary I rekon this is a good rule of thumb...
pre 78 --25:1 mineral
a/c post 78 --25:1 mineral - 40: 1 synthetic
L/c 40:1 synth.
how does that sound??
Yeah I'm with 25:1 mineral, 40:1 synthetic