IT250K

[Tossa]

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

[Rossvickicampbell]

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?

[Tossa]

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

[80-85 husky]

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...

[Ted]

That'd be 927

[Tossa]

thanks guya.  My thought were towards the 40:1 with new age oils and fuels

[Rossvickicampbell]

if it does help Baz - I have run my YZ on 40:1 Silkolene synthetic for years now and never had an engine issue.

[Slakewell]

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.

[Tossa]

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

[kim80y]

Run my IT"s and YZs at same ratio as 1st post with same oil.
Have for 20 years.
Cheers
Kim

[HeavenVMX]

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.

[80-85 husky]

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

[b490]

 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

 
 
 
 

[evo550]

The oil manufacturer recommends the ratio to run their oils at.....

[Tossa]

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