Oil Questions
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Hi, yes thanks very much that helped a lot, so for gearbox oil any engine oil as long as it's 10w30 does it have to be fully or semi , and for engine oil any decent 2t oil I take there no 10w30 or 10w40 for this also does it have to be fully or semi ? Lol and coolant any premixed coolant should be fine? And change the gearbox oil and coolant at least once a year ? And top up up engine oil when necessary. Many thanks. Again sorry I'm very very new to all this 2 stroke malarkey and want to make sure it is well maintained.
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@yamahaman5000 For the gearbox I have always used castrol gtx semi-synthetic 5w-30.
Two stroke doesn't have those properties specified. But any decent oil should be sufficient, I prefer silkolene fully synthetic.
Coolant, I personally have gone for evans waterless coolant, but I used to use CarPlan premix. But each to their own for that one.
Engine oil, well light comes on and you fill it up.
Gearbox oil should be replaced according to mileage, if you do lots of miles, then replace the oil.
The oil is designed to be replaced after 10k miles in a car, so probably doesn't need replacing in a DT. Replace oil when you do the piston and rings, approx every 10k.
But again it's all down to how you ride.
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Thanks for help, that's cleared everything up.
. Is there anything I should look for when buying a dt 125. So you recommend changing piston and rings every 10k is there a kit I could buy online all in one. I know a friend who would do this for me if needs be so should save a lot of money on Labour etc. -
@yamahaman5000 These bikes are pretty bullet proof. I do piston and rings every 10k because my bike isn't in stock trim.
I had my bike stolen and ramped and battered on the stock piston for 15k miles and it was in mint condition.
I err on the side of caution, but others will be happy to leave the engine till its seriously down on power.
It's cheaper to replace rings earlier than necessary, rather than to have the engine fail and need a full rebuild.
Many people rebuild the head gaskets using cheap pattern parts, only Genuine or Athena gaskets can be used.
In which instance the head gaskets tend to be blowing because people "can't" fix them.
If that's the case it just needs a gentle skim and a decent head gasket. Clues to this will be the expansion bottle missing the little cap, usually the first thing to go when the head gaskets gone.
There will be a layer of black oil circulating around the radiator system, take the cap off and run your fingers inside and you will be covered in oil
The swingarm bearings wear and don't get replaced. Pull the bike on its stand, pull it off the wheels over to you and check the swingarm for side to side lateral play.
This is less common, but is just general advice for DT's.
They're pretty darn strong bikes, there doesn't tend to be common faults that need looking out for.
Generally, pay extra for a better condition one and it'll serve you well.
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And note, not all 2-stroke oils are suitable for premix. Make sure it says so on the bottle, unless you mix it up yourself.
Just about any half-decent 2-stroke oil will do, but most use some of the best, as the pricedifference per mile is so small nothing.
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What do you think about this oil?
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It's about £36 for 4 liters.
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I'm asking for oil quality only, which is the best.
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@irongamer727 It's subjective I guess. Personally I run Silkolene oils for my four strokes. But currently running Castrol in my Starlet as a quick fix. It's leaking it all over the floor so need to sort that out.
Always Originate, Never Pirate!
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@irongamer727 To each their preference. My mate works in the oil industry for motul, so when I need oil I just ask him and he'll bring the best stuff
Yamaha DT125R Blue 2002, XT 125 1982, Yamaha WR250Z 1992, BMW GS650F 1994, Benelli BN302 2015
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It just feels so hard choosing. I want the best possible oil for my machines!
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@irongamer727 As long as you stick with the bigger well-known brands you can't really mess it up. As for types of oil I use yamaha 10w-40 4t for my gearbox and motul 100% synthetic 2-stroke oil for the engine for all my 2 strokes. If I don't have motul, I just go with castrol.
Yamaha DT125R Blue 2002, XT 125 1982, Yamaha WR250Z 1992, BMW GS650F 1994, Benelli BN302 2015
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@yamahaman5000 I always found that Silkolene products were very high quality and performed very well indeed.
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My castrol oil cost roughly £10 for 1l. I found that silkolene for a whopping £22!!
You guys think there is a difference in quality between them?
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@irongamer727 You can get Silkolene comp 2 for £15 a litre, which yes is more expensive, but as with everything in life - quality does not come cheap. Some people will say that oil is oil, but all the top race teams will most definitely not be using Castrol oil for-sure.
