New member intro and TS250 fuel tank size question.

[Kruh]

Pretty cool. I've never seen that measuring cup.
My TS250/1 doesn't have it, and I see no sings it ever had one.

[Blurredman]

Okay I found some TC grade 2T oil (Lucas semi synthetic) and going to run that on 40:1 based on previous owners recommendation. Now I just need to figure out a solution to carrying around/measuring the oil While on the bike.

All my two stroke MZs (I`ve had five of them) had a measuring pot on the underside of the filler cap marked 33:1 or 50:1 depending on engine size, doesn`t yours? Carried a bottle of oil behind a side panel.
Mine certainly all had long and hard lives, be it hard road miles or (in the case of the trail bike versions) Low speed running with cooling fins clogged with mud, all good.
Remember, they are relatively low revving engines NOT racing ones and the more oil you add the leaner you are making the mixture.
Each to their own at the end of the day but i think the manufacturer have more idea than us mere amateurs.

I carry a half litre bottle in my rucksack- which is something I feel naked without these days. I need it to carry work stuff anyway so it's no biggy- it can also carry bike repair tools


33:1 = roughly 530ml of oil per 17.5l, 50:1 is 350ml. There's only 1 percent difference in oil ratio- The ETZ official service manual didn't see it worth mentioning any difference in jetting between the pre-mix and the oil pump models.

[Puffs]

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[R1100purist]

Hi all as the original poster, I really appreciate all the input! It’s seems like you can go wrong with a quality 2T oil at a mix 50:1 or even a tad richer if that’s something you’re concerned about. Either way I need to get myself one of those cool gas caps with measuring cup! I’m always making a mess.

I’ll continue to clean up and sort my MZ and post more pics and questions along the way.

Thanks again!

[parrbd]

I use chainsaw oil in my 84 ETZ (owned since new) because it is available everywhere in my area. I looked on the label of my makita oil and it is rated JASO FD. The other brands are probably the same. I tip in to the tank one mililitre for every kilometre since the last fill up (eg 250km means 250ml) and then fill her up with the bowser. At my fuel consumption, this works out at about 45:1.

[breakwellmz]

The filler caps with measuring pots must have been only for the UK market, i think the wording was something like " fill to mark for 1 gallon 50:1" I have one in the garage i must check.
As i`m sure you know the UK gallon is bigger than the US gallon.
My Gas Gas Pampera TRAIL bike ran on 50:1 but forum discussion would be about running less oil rather than more.

https://www.ebay.co.uk/itm/MZ-125-150-2 ... 4311231950

https://www.ebay.co.uk/itm/D-60-Fuel-Ta ... Sw8d1fXRer

https://www.ebay.co.uk/itm/1978-MZ250-T ... SwYrZeUZM1

[Guesi]

The ES models had to use 1: 33 because of the gudgeon pin bearing.

The later models had needle bearings, so MZ changed the recommendation to 1: 50.

Using more oil does NOT mean the lubrication gets better, it means that not all the oil can be burned and so there will be more carbon deposits on the piston and piston rings.So Piston rings can stick...


But do whatever you want

By the way:
Someone asked what MM and EM means on the description of the MZ engines, like EM 250 or MM 250/3 or MM 250/4.

MM means Motorradmotor(Motorcycle engine) in contrast to RM for Rollermotor (Scooter engine)

EM means Einheitsmotor (Standard Motor)

[Puffs]

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[Guesi]

Hello

I mix about 1: 50 and 1: 70

with semi synthetic 2 stroke oil.

[Puffs]

Thanks for that info, and also for the EM = Einheitsmotor!

Maybe Blurredman was right, maybe it indeed just depends on the application.

[R1100purist]

Guesi and puffs thanks for the lively conversation. I’m hoping this thread can be useful for others searching in the fuel. I understand the normal perils and pitfalls in discussions about oil and oil quantity on forums but I feel this has been a nice conversation among all players.

In the end it sounds like if I’m 50:1 or slightly richer I should be good to go. To that end I found an 8 oz (250ml) nalgene brand container with graduations to accurately mix/carry oil on the road.

I’ll be cleaning up my TS 250 this weekend and I’ll take some photos post clean!

Thanks again all for the responses.

[Blurredman]

An 8oz bottle would be just fine for the 12.5litre/2.7gal tank you have for 50:1

[Puffs]

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[R1100purist]

Alright, got her cleaned up and did an initial shakedown ride. It was out to the country side and she did fine. Although a little difficult to keep her idling, and after a fast run idle was reluctant to come down.

Additionally there was a little leak from the drain plug that I’m trying to sort out.

[Puffs]

Nice bike!

Check if everything seals well & that it doesn't aspire air bypassing the carb ('false air'), that might cause your idling issues.