Hello, I just purchased a new Birel with a 125cc X30 TaG engine. I have a few questions…
Best castor based oil to use?
Onces per gallon of 2 cycle oil?
Best coolant temperature in ⁰F?
Optimal EGT in ⁰F?
Should I use a little more oil during break-in?
What is the best way to break in the new engine, and for how long?
I’m more into longevity, and not so much maximum HP.
In the 90’s, I raced a Kali Kalifornia with a Parilla TT36, and the oil mix was 4oz. of Castrol castor R40, but I hear the X30 takes much more oil?
Thank you!
I use Elf HTX 909, it’s recommended by IAME. Not cheap but works well.
I use 8 Oz per gallon as recommended to me by both IAME and Fellow Karters
Like most Karts I like to be around 135 f on coolant temp and around 1175ish egt. Of course there are a lot of factors, I would highly recommend getting The IAME jetting app. It’s only 5 usd on the App Store and pays for itself after the first use.
Not a break in expert but I don’t see why using a little more oil would hurt.
Follow the manual for break in instructions. I really baby the engine in the beginning and then build up the revs. https://iameusawest.com/content/X30-Assembly-Manual.pdf
It’s page 26
Hope this helps!
Elf HTX 909 is a blend of castor and synthetic oils. It’s magic.
IAME and Elf recommend 4% oil, which is 5 oz per gallon.
Coolant temperature should be around 50 C (125 F).
Best EGT is 1000 F, higher in qualifying.
Same amount of oil for break-in and normal use.
To break in drive the engine normally but choke the airbox when you get to 10000 RPM for the first 5 minutes, 11000 RPM for the 2nd 5 minutes, and 12000 rpm for the third 5 minutes. Ideally you’d have short sessions on a quiet practice day to allow full cooling between these.
The question you didn’t ask is “what fuel should I use” and the answer is 93 octane pump gas, fresh that day, with any remaining mixture at the end of the day used either to clean parts or start the campfire.
Thank you!
I was going to get 100 octane unleaded race fuel because our 93 octane has 10% ethanol, or does that not matter? Some say 6-8oz per gallon. Is that with a different 2 cycle oil?
5oz. per gallon should be safe?
Thanks for the information!
I’m slowly convincing people that ethanol is a beneficial and useful component of kart fuel. It’s good for both crankcase cooling and detonation prevention. I like Marathon/Speedway 10% ethanol 93, but if you prefer another brand it’ll probably be good too.
5 oz per gallon is what both IAME and Elf recommend. If I were stuck using a generic mineral 2-stroke oil I’d use 8 oz per gallon.
Thank you!
One last questions. What tire pressures should I start out with?
It’s been a long time, but I think I used to run between 24 and 28 psi.
You’ll want a different tire gauge. With the MG Yellow tire we start at 10 PSI!
Yes, it must have been much lower. I think I was thinking of the Porsche 914-6GT I used to race in the late 90’s early 2000’s.
I know on that car we were running 22psi fronts and 24-26psi rears.
The spec tires here in Jacksonville Florida are Vega Reds for the junior and cadet karts, and I currently have new Vega Blues on the Birel with the X30.
So typical tire pressures are from around 8-13 psi?
Thanks!
For break in follow the IAME user manual, just google x30 user manual you’ll find it.