2-stroke gearbox oil type and 2-stroke mix

[Blue_SV650S]

Do you use normal bike multigrade 4-stroke engine oil, or do you use gear oil?

Also what ratio 2-stroke mix do you use (pre-mixers obviously).
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The purpose of life is to fight maturity.

[Kickstart]

Hi

Depends how I feel. Have used normal multigrade quite often.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[.....]

50:1 for me in the smoker.

[Blue_SV650S]

Ok, I'll use normal 10w40 bike oil in the 'box ...

boundy runs 50:1 2-stroke in his gasser too ... but a bit of googling seems people run 40:1 in KTMs ... not really sure why!?!?!? Any ideas????


Oh yeah, what is the accepted mix for running in ... and how long/far should I be doing it??

My concern is that green laning itself is pretty harsh on a motor, especially when it is as muddy as it is this time of year, I am obviously intending to be doing mega revvs, but there is certainly a lot of load ... which is what you are suppose to avoid when running in (revs being a kind of heavy loading) ... I am thinking I should bang a few road miles in before going offroad ... but realistically how much time do I need to be running it?
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The purpose of life is to fight maturity.

[Charlie]

Not that I agree (or disagree) but this might prove interesting:
https://www.mototuneusa.com/break_in_secrets.htm
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Past: Honda x8rs, Honda City fly, Honda Hornet 250, Honda VFR750, Yamaha xt600e.
Current: Honda CBR929RR & Yamaha XT660Z Tenere

[Blue_SV650S]

[.....]

What are you running in? Top end all whole engine?

Warm it up then ride it normally. Job done.

Although this is not based on any technical knowledge.

[silky666]

[.....]

Silky's stroker denial is like closet homosexuals in that the ones that protest the most are usually the bummers.

Face it Silky, you love the 2 strokes.

[Blue_SV650S]

[silky666]

[Blue_SV650S]

I have heard of the heat cycle method - when I paid for the work today, I asked them how they reccomend I run it in ... supposedly they put destructions in the box .... wonder if they state the cycle method??
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The purpose of life is to fight maturity.

[ms51ves3]

The only thing that needs running in on a 2 stroke is the piston so what's on the website Charlie posted up is still relevant.

Personally, I'd warm it up, take it gentle for 10-20 miles and then forget about it.

[stevo as b4]

I use Castrol MTX transmission oil which i think is semi-syth in all 2 stroke engines i've had in bikes. It made the gearchange feel much more slick and positive on my KMX200, so i've stuck with it really.

As for pre-mix, i would consult the manufactuer's manual, as the ratio can depend on a few things really. I've used 40:1 in all my old trials bikes, and on my old YZ125, and if jetted right they never smoked much when hot.

Just pick your favourite brand of 2stroke pre-mix only fully synthetic oil. I'm not a fan of oils where they say they can be used for both injector and pre-mix systems, as they are often too thin IMO. I do rate Motul, Silkolene, and especially Rock oil fully synthetic oils.

[Blue_SV650S]

FYI, the gearbox oil that the engine place supplied me with the motor is this :-


Rock Oil GRO clicky

Anyone else use it?
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The purpose of life is to fight maturity.