Fuel and oil ratio for 2 stroke Solex moped.
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Thread: Fuel and oil ratio for 2 stroke Solex moped.

  1. #1
    1000+ Posts Bad Bertie's Avatar
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    Default Fuel and oil ratio for 2 stroke Solex moped.

    Got meself a Solex moped with the two stroke engine on the front wheel. I have a 5 litre container with fuel, and a 200 ml container of two stroke oil, how much of that i put in with the 5 litres of fuel? Appreciate your knowledge.

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    Quote Originally Posted by Bad Bertie View Post
    Got meself a Solex moped with the two stroke engine on the front wheel. I have a 5 litre container with fuel, and a 200 ml container of two stroke oil, how much of that i put in with the 5 litres of fuel? Appreciate your knowledge.
    http://bpretail.bp.nl/australie/2_stroke_brochure.pdf

    I'd suggest 50 :1
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    Quote Originally Posted by robmac View Post
    Ah, thank you Rob! It's a long time since I tanked my mopeds in Holland, and there were pre mix bowsers for the mopeds.

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    Quote Originally Posted by Bad Bertie View Post
    Ah, thank you Rob! It's a long time since I tanked my mopeds in Holland, and there were pre mix bowsers for the mopeds.
    25:1 is for a fully synthetic oil.

    If it not a full synthetic use 50:1.
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    I usually follow the manufacturers spec, but add a little more oil.
    My rationale is that the dissolved oil is the only form of lubriation for the engine internals. I would rather err on the side of longevity.
    Btw I have an old Dolmar chainsaw that runs at 25:1 and a newer Husquavana that runs at 33:1
    Given the age of the velosolex (I assume that it is some years old?) and based on my experience, I would be suggesting 25:1.
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    Good grief, a Very Sore Legs.

    Don't forget, this not being Holland, not to go down long hills with a closed throttle......

    Pre-mix bowsers!! I had NEVER heard of that. How interesting.

    Enjoy.
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    There's a Solex S3800 manual at http://www.generare.com/SolexManual.pdf. 4 oz to 1 US gallon in that publication.


    (1:32)

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    Quote Originally Posted by seasink View Post
    There's a Solex S3800 manual at http://www.generare.com/SolexManual.pdf. 4 oz to 1 US gallon in that publication.


    (1:32)

    Heavens, it will pollute like a VW diesel with that much oil.

    Respectfully, I'd use 1:50 mix with a full synthetic lubricant.

    Stihl sell a two stroke additive which I've used successfully on all 2 stokes.

    I hope Bertie is wearing his wooden shoes when he is riding it.
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    i have a vague idea there were premix pumps at gas stations in oz up till the late 60s.
    is that right?
    perhaps it was some other sort of "mix".

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    You are right.
    BP Zoom was available in a bowser, later a 44gallon (200litre) drum with a tap at my local service station.
    I have a hazy memory it was available in two mixes (strengths) for a while.
    Zetas, Victas, Vespas, Qualcasts, would have been the market I assume.

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    Quote Originally Posted by alexander View Post
    i have a vague idea there were premix pumps at gas stations in oz up till the late 60s.
    is that right?
    perhaps it was some other sort of "mix".
    Yes, I recall the BP Zoom pump in the Beach side Servos on the Mornington Peninsula. Dromana, Rosebud, Rye and Blairgowrie and a line of Dudes with their outboard tanks filling up.
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    Quote Originally Posted by robmac View Post
    Yes, I recall the BP Zoom pump in the Beach side Servos on the Mornington Peninsula. Dromana, Rosebud, Rye and Blairgowrie and a line of Dudes with their outboard tanks filling up.
    I hadn't thought of boats, Rob.
    I was thinking more of the 1/4 acre blocks in the 'burbs, some 15 km from the CBD.

    What other users would have needed 2 stroke?

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    Quote Originally Posted by David M View Post
    I hadn't thought of boats, Rob.
    I was thinking more of the 1/4 acre blocks in the 'burbs, some 15 km from the CBD.

    What other users would have needed 2 stroke?
    Motorbikes, agricultural power equipment used two stokes. The latter superseded by diesels these days.

    Rather than have it "on tap", it obviously became cheaper to sell the oil in the servo shop and let the user mix their own.
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    ah yes, back in the days when australians had real backyards for their kids, so everyone in the burbs had a lawnmower.

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    I would go with the synthetic oil at 33 to 1, (150ml to 5L) given it is an old air cooled 2 stroke. I didn't work out the figures from the manual,(I see now 32 to 1 written lower) but I would guess it would have been 25 to 1 in the day. New synthetic oils produce a lot less smoke than the oils of the '70s, and are much more effective. Modern 2 stroke water cooled trials bikes are up at 80 to 1, but are not being revved very hard or for very long.
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    Quote Originally Posted by David M View Post
    You are right.
    BP Zoom was available in a bowser, later a 44gallon (200litre) drum with a tap at my local service station.
    I have a hazy memory it was available in two mixes (strengths) for a while.
    Zetas, Victas, Vespas, Qualcasts, would have been the market I assume.
    BP Zoom, of course. I'd completely forgotten!
    JohnW

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    Quote Originally Posted by alexander View Post
    ah yes, back in the days when australians had real backyards for their kids, so everyone in the burbs had a lawnmower.
    And most were two-strokes until the 70s I think.
    JohnW

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    Quote Originally Posted by alexander View Post
    i have a vague idea there were premix pumps at gas stations in oz up till the late 60s.
    is that right?
    perhaps it was some other sort of "mix".
    If memory serves, the premix pumps at the servos wasn't two stroke but a octane mixer so you could mix your fuel to the optimum octane rating for your car. Went from standard (around 90RON) to super (around 98RON).
    Was a total flop, didn't take long to work out 99% of cars were just as happy with either standard or super. Cars weren't sophisticated enough that a couple of octane points between the two made any difference.

    But most servos would mix up two stroke for you. Don't know what ratio it was, you got 2 pumps of oil in your gallon can.
    But of course there's no such thing as service stations any more, just filling stations so you have to mix your own.

    Cheers
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    Quote Originally Posted by REN TIN TIN View Post


    But of course there's no such thing as service stations any more, just filling stations so you have to mix your own.

    Cheers
    Ren
    Ironic isn't it in these days of protection of the general public from any dangerous materials or dangerous practices here we have the opposite.
    Economics has dictated that cars are no longer refueled by a person familiar with the procedure and the dangers involved and one who could be trained as a specialist at the job..
    Basically anybody can walk onto the forecourt , grab a nozel and do what they like with the highly flammable liquid available.
    Try doing that with any other material with a similar MSDS profile.

    Paul.

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    Quote Originally Posted by 504-504-504 View Post
    Ironic isn't it in these days of protection of the general public from any dangerous materials or dangerous practices here we have the opposite. Economics has dictated that cars are no longer refueled by a person familiar with the procedure and the dangers involved and one who could be trained as a specialist at the job.. Basically anybody can walk onto the forecourt , grab a nozel and do what they like with the highly flammable liquid available. Try doing that with any other material with a similar MSDS profile. Paul.
    You make such a good point. A couple of years ago I had to stand looking serious while I was given a safety induction at a mining company office. The subject of the induction? The coffee machine. You couldn't make it up, could you!!!
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    Quote Originally Posted by JohnW View Post
    Good grief, a Very Sore Legs.

    Don't forget, this not being Holland, not to go down long hills with a closed throttle......

    Pre-mix bowsers!! I had NEVER heard of that. How interesting.

    Enjoy.
    Well, it had to be. I had various mopeds. A NSU Quickly, Puch, and a Mobylette. All 49CC, and I never added oil to the fuel. Dont forget, there were hundreds and thousands of these things running around in those days.
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    Not that it really matters if I get them running or not, as they are deemed to be illegal on the roads?

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    Petrol power was banned last year. Currently
    Legal bicycles from 1 October 2014 include:
    Regular bicycles with no engines attached
    Complying 250 watt pedalecs
    200 watt power assisted pedal bicycles that have an electric motor
    It was stated by the RMS that it was previously too difficult for policemen to assess the motor capacity. There is a lot of info and test data here - http://roadsafety.transport.nsw.gov....ycle-tests.pdf

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    About SolexOz

    look here for inspiration and information on oil/fuel mix ratio. cheers Hawk ( Ted Cross )

    viz
    FUEL MIX: In many of the Solex user manuals, differing oil/ fuel ratios
    can be found ranging from 2% to 6%. With modern oils especially
    Synthetics I have found that 2% works best with un-leaded and reduces
    smoke and oil drips from exhaust. Good quality motorcycle 2 Stroke
    synthetic or semi-synthetic oil is best. Avoid using premium un-leaded
    as this can breakdown the lubricating properties of the oil.
    SPARK PLUS: The original V36 Marchal plugs are very hard to come
    by if at all, the following plugs are readily available and the correct
    replacement type: NGK B6HS, Bosch W7AC and Champion L10.
    HEAD LIGHT GLOBES: The correct globes for most Solex headlights
    are 6v. 6w. and are very hard to find.

    AIR FILTER: The original air filter material is costly and hard to find,
    a great substitute that I have tried and works well is surgical gauze.
    Packets can be purchased from your friendly chemist very cheaply. Just
    lever off the air filter retaining ring and place a single sheet of gauze
    over the inlet, trim excess and press on the ring. Old blocked filter
    material can cause rough running and power loss through rich mixture.
    Last edited by hawk; 12th December 2015 at 04:46 PM. Reason: additional assistance

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    Quote Originally Posted by hawk View Post
    About SolexOz

    look here for inspiration and information on oil/fuel mix ratio. cheers Hawk ( Ted Cross )

    viz
    FUEL MIX: In many of the Solex user manuals, differing oil/ fuel ratios
    can be found ranging from 2% to 6%. With modern oils especially
    Synthetics I have found that 2% works best with un-leaded and reduces
    smoke and oil drips from exhaust. Good quality motorcycle 2 Stroke
    synthetic or semi-synthetic oil is best. Avoid using premium un-leaded
    as this can breakdown the lubricating properties of the oil.
    SPARK PLUS: The original V36 Marchal plugs are very hard to come
    by if at all, the following plugs are readily available and the correct
    replacement type: NGK B6HS, Bosch W7AC and Champion L10.
    HEAD LIGHT GLOBES: The correct globes for most Solex headlights
    are 6v. 6w. and are very hard to find.

    AIR FILTER: The original air filter material is costly and hard to find,
    a great substitute that I have tried and works well is surgical gauze.
    Packets can be purchased from your friendly chemist very cheaply. Just
    lever off the air filter retaining ring and place a single sheet of gauze
    over the inlet, trim excess and press on the ring. Old blocked filter
    material can cause rough running and power loss through rich mixture.
    Good to hear from you Ted! Still got yours?

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