Hi chaps, I've just bought a cheap beta techno 250. The first issue I need help with is the oil like substance leaking from where the rear silencer joins the centre section. Do I need to do rings or something else.

The other issue is that the cooling fan is missing. Is it necessary or can I do without it for now.

Thanks in advance

Carl

The technical term for the fluid coming from the silencer is "Spooge" LOL

All it indicates is that you are running rich or possibly the oil mix is way to conservative

Run it at 80:1 with a good brand of oil, might need to repack your silencer as it will be plugged with the gorp

As for the fan, ya I think you will need it

Thanks 0007. Carb is off for a clean. When you say mix is too conservative do you mean not enough fuel or oil. And fan is on order £120 ouch. Thanks again

Conservative would be running it at 20:1

I run my bike at 80:1 with a good quality Motorsport oil

Avoid cheep oils and marine oils

just to be clear thats 80ml of oil for 5l of fuel? is that right

80 liters of gas to 1 liter of oil

8 l to 100cc

4 l to 50cc

That's how I do my moron math LOL

Easier way= 1 litre divided by 80, so as follows:

1000 (ml) divided by 80 = 12 .5 - so, you use 12.5 ml or cc of oil per one litre of gas

Multiply as required for the number of litres of gas you have

Edited April 28, 201313 yr by canada280i

Now that's what I call a definitive answer. Now I know I need 62.5 ml per 5l of fuel. Previous owner ran 75ml per 5l which is probably why I've got spooge from the exhaust.

Many thanks

Carl

I use 16ml oil per litre of fuel at 60:1. No spooge.

Just make sure at least once a ride you get the pipe warm by doing 5-6 3rd gear roll ons, low speed to fast and back whilst under load. Also change you silencer packing as it is a sign that it is soaked with old oil and due a change. All two strokes make spooge but most applications get hot enough to burn it off. Trials irons don't tend to rev to clear it.

This is one of the reasons they are no longer accepted as mainstream racing tools because they are dirty and fairly oily beasts. I'd rather have a tad of spooge at the end of a years riding than a seized/worn motor through lack of oil.

I've pulled the packing from the exhaust and it was like an oily rag!! Now repacked and ready for action