Good day.
I am from Europe from the Czech Republic.
I repaired my 1977 Yamaha DT 125E type 1GO.
Can you advise me what carburetor jets I should put.
For me, the main three in the manual is the 95/100/105 option.
Is it possible to give size 110?
The motorcycle is just getting started after being polished, even though the power is low, the motorcycle drives very poorly.
Sorry, I'm writing through a translator.
Thank you and best regards, Daniel Jaroš.

Vítejte z Kalifornie U.S.A
Může to být tím, že máte ucpané výfukové potrubí.
Sundej to z kola a spal to v ohni, aby se to vyčistilo.
Uvidíte spoustu kouře.

Taky píšu přes překladatele.

Slabý výkon může způsobit ucpané výfukové potrubí.
Zkuste a pošlete fotku svého kola, máme rádi fotky.

Welcome. With main jets if you go too large in numbers it will just go rich & not rev right out so no harm [no damage] in experimenting with a 110.

děkuji

Thanks for the anwers.
As for the exhaust, it's ok.
Triska is a 105 carburetor mikuni 24mm.
The problem is that the maximum speed is 80 - 85 km/h ccm
The motor has a speed of approx. 7500 rpm
It runs fine on the first 3 gears.
When I shift 4th and 5th the gear reaches 80km/h and between 4th and 5th the speed does not increase
The motorcycle spins but has no power and does not pull.
The engine has been driven approx. 500 km after a complete go.

Try cleaning the points, or better still replacing them.

Ok, so i'd better not mention exhaust again. Does it have points gap close to 15 thou. I've seen them close right down to very little gap which pulls the timing back to nearer tdc.
Are you expecting too much from it. Is it way overgeared.
I'm thinking yours is magneto of course, but is it electric start?, in which case is the advancer opening up fully, & points gap still apply.
Head off into the country with the exhaust tail muffler removed for a try. [sorry wasn't going to say exhaust was i lol].

Thank you for your answers.
I have already tuned the engine.
I don't expect much from the bike.
It's got 10hp but it just rode badly.
The problem was the rosette I have 37 teeth and it is supposed to be 45 teeth.
The previous owner put it in and I didn't realize it was wrong.
The exhaust is clean.
I bought a replacement exhaust kit and am going to modify it and look inside.
They're typing through a translator.
I'm from Europe from the Czech Republic have been repairing and restoring motorcycles with my dad for 16 years.
You can check us out the web site www.dilna-jaros.cz
Thank you Daniel.

Thanks for the link. I'm going to very much enjoy looking through that. I might need to translate it but photos tell 1000 words. Thanks again.