"Recommend me a decent two-stroke oil?" thread in "Motorbike Chat"
It's been a good while since I've had to buy any two-stroke so what's a good 'un these days? It's for a road-ridden TDR, not ...

It's been a good while since I've had to buy any two-stroke so what's a good 'un these days?

It's for a road-ridden TDR, not a racer.

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UXB - Welcome To The Dark Side

Hi Nik, can't go wrong with this stuff. Used to be called TTS but now they've renamed it to Power 1. Not cheap though, you're looking at about £11 a litre.

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http://img.photobucket.com/albums/v1...ha/sigmain.jpg

Yipe! Really? That much! Foocanell.

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UXB - Welcome To The Dark Side

Silkolene comp 2 injector about £8 a liter top stuff

I've long been a fan of Silkolene, on road and track. It's never let me down, which is about all you need to say.

But TBH as long as you go for a reputable brand of bike oil (don't use car oil!) you won't go far wrong. For a road bike use semi-synth injector oil as full synthetic may not burn fully, especially if it's formulated for premix, on road bike part throttle use.

PS oil is cheaper than engines!

Thanks!

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UXB - Welcome To The Dark Side

If it's a premix like mine, use Castrol A747, she don't come cheap though!!!

Attached Images

castrol_a747.jpg (22.8 KB, 21 views)

It's not, but ta!

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UXB - Welcome To The Dark Side

I always used a semi synthetic mid price two stroke oil in my TDR - it was fine for 1000s of miles.

The top end fully synth £10+ a litre is overkill in a Yamaha 40bhp 250 parallel twin IMHO.

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Lying outrageously on the internet since 2003

What's your bike Duddits? I only ask because I used to use Pro-2 (equivalent of A747 more or less) in our kid's KX85 and it always ran very oily. I later realised that motocross premix oil is thinner because you don't get the sustained full throttle use that you do on a road racer. Road race oils, (which A747 and Pro-2 are) besides being too viscous for pump lube systems, need a high temperature to burn off fully, and don't burn properly in road or MX engines. MX oil is formulated differently to burn off at lower temperatures so you don't get oil fouling and coking.

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Never break more than one law at a time, and never carry more grass than you are willing to eat.

I believe sir, you could well be right there.
Caster927 is the same sort of thing as A747, the problem is, they're caster based, or caster synthetic blend. Everybody that runs these oils complains of "gumming up", the sticky oily residue that ramains on powervalves, it seems to be the nature of the beast regardless of the application. A747 was developed for multi cylinder 2strokes like RD's & RGV's, not for single MX bikes. The "gummyness" can be reduced in a number of ways. Run as lean as you dare and the bike will perform fantastic (for a reduced period) run rich and she'll run like a pig but forever..... Jetting plays a HUGE part in the burn but it takes forever to get it perfect and TBH I can't be arsed. They're high maintenance engines and running caster just makes them a bit MORE high maintenance). To reduce the stress and make it more cost effective I run at 50:1, no more oily, but how long will I get away with it? Further to that and getting back to the point, I think the choice of oil is determined by atomisation rather than temperature (won't be the first time I'm wrong though) My RGV ran just as gummy as my MX bikes on this stuff but that could be as much to do with setup as oil choice.

In conclusion though, a 100% synthetic oil, premix or pump will always run cleaner than caster............Wont smell as good though