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The Shop
I'm so ready to ride!!! Springs come in on Saturday. Hoping they get in early enough that I'll have time to install them and take it out on Sunday. Got the handlebars/grips/sunline brake lever put on Tuesday. All I need now is the springs, suspension oil and gas.
Whoever said Castor is shit is correct for this rider.
Castor IS the best 2 stroke oil.....for high rpm high heat sustained load apps.
And race applications with frequent teardowns.
Castor is dirty and was good way back.
Today a quality full synthetic approaches castor properties while being way cleaner.
However you won't seize with any oil at the right ratio.
What's right? That depends on you.
A shifter kart 125 runs 16:1. Far too oil rich for a my bike.
Ron lechien ran 24:1 but your grandma could easily get away with 100:1.
Oil migration time is what determines what is correct.
SX and woods doesn't need the oil of say a desert guy.
You dig?
It's not the best fuel for this application per se, but it's far better and far more consistent than any shit from the local station.
Including stations selling shit like 100 street that never sells and is probably stale.
Even Dick Lechien would tell you seizures are caused from runaway heat or too little oil for your use.
Meaning JS7 on a 125 needs way more oil than grandpa putting around the back 40.
Secondly don't tell anyone your four choke blew. THAT DOES NOT HAPPEN
Oh yea and run Maxima Castor 927 or Klotz Benol with Avgas from your local airport. Your nose will appreciate that.
Another thing to think about is the more oil in your mixture, the less fuel and oxygen which equals less power. Just my 2 cents. I actually use and recommend it at 50:1 myself as I like that little bit of margin for error and durability. Used it for years at that ratio too.
At times more oil creates a better ring seal.
There is no correct ratio. Only what's right for you and what you're doing.
I'm a fan of castor.....I'm old school.....but it's not needed in a my bike except for say Stewart barcia or decotis on a 125.
Or shifter karts. It is the best oil. However a quality synthetic like Motul Klotz or even Maxima K2 is approaches the pure film strength of castor with much cleaner burning.
And for the 927 guys.....it's a syn/ castor blend.
For this guy....Yamalube R at 40:1 would be good enough for Chad Reed at Glen Helen.
Or whatever you can get a deal on. This isn't the 60s or 70s where 2 stroke oil was thinned out 30 wt motor oil.
Personally, I prefer a light viscosity semi-synthetic oil because they mix easily in any fuel and they stay mixed no matter how cold it is outside.
My bikes guts always look fresh when I pull them apart.
mmmmmmmmmm..............
Pit Row
Can't go wrong with this oil. You will thank us later when you do a top end.
We run all our 2-smokes on it @ 32:1. Stock YZ 250 we run a 50/50 blend of 110 race fuel and 93 pump gas. Mod 125's get 100% 110 race fuel.
37.2 Hours and this is what our KX125 head looked like.... Notice the lack of carbon build up!
(Spark plug is loose and backed out, pits in the head are from a previous owners oops....)
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For the masses it's good enough at the right ratio for their application.
Look at chain saws. Air cooled hot running and those things are WFO with a heavy load for way longer than a mx bike.
At 50:1 that scares me a bit but Damn things run forever.
I run 40 to 1 in my saws with whatever I can get cheap.
I'd bet that stihl oil above is as good as any.
Everyone just adds their own additive package.
I've ran cases of Havoline 2 stroke. Same as Chevy Texaco Pennzoil or quaker state.
I say for bikes run a moto brand and support the sport but think of this. Honda Yamaha etc buy the oil from a refiner....someone.
I read an article a few years back that measured horsepower with different ratios and even with gas that had sat for several months. No significant difference whatsoever.
The reason I run 32:1 is because it's 4 oz per gallon. Since the bottle has a scale on the side in 4 oz increments I just add 8 oz of oil to a 2 gallon gas can and skip the hassle of dealing with the Ratio rite cup. No cleaning required.
The race gas sounds interesting. I think I'll give that a try.
Little back ground, I'm 40 and ride vet INT and open and let me tell you. You havent lived till you decide to run the 125cc open class at 40! 8 little shits on the line and I was old enough to be there dad! Anyway was 2nd out of the first turn and lead for about 10 seconds lol, ended up going 4-3 for 3rd overall. Anyways I knew somebody that was looking for a backup 250f and hit him up about his CR and the deal was done. So pumped! I got some vid I'll edit and post here in a few.
Best thing you can add to your gas is Yamalube Ring Free. Might have to have your shop order it or go to a Yamaha boat shop and they will have it.
I have seen the before and after first hand with the Ring Free and man it makes a huge difference.
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