Yamaha QT 1980 Mods

Can anyone tell me anything I can do to my Yamaha QT 1980 to increase its top speed? It just goes so slow...


Re: Yamaha QT 1980 Mods

david f martin /

I tried all kinds of stuff to mine, but it only ran much better after I pulled the head and cylinder and cleaned all the carbon out of the ports and from the top of the piston... Hope that helps.


Re: Yamaha QT 1980 Mods

I'm just browsing and looking for some nice pictures of a red qt50 (used to have one back in the day) but I can help you with your search for more power. First pull the head and cylinder and clean all the carbon as mentioned earlier. It also helps to use a good sparkplug. I enlarged the intake air horn on the carb and radiused all the hard edges inside it...then followed that up with a full polish on the inside of the carb. You can pick up a lot of power by smoothing out the little intake pipe between the reed valve and carb...You need to use a die grider or dremel with a long carbide bit. I enlarged and contoured the ports in the cylinder, and also milled the head for some more compression. You can add a k and n filter to the carb if you get rid of the stock side covers over the air filter housing. If you want to know more just email me at matpei@yahoo.com

Re: Yamaha QT 1980 Mods

Hallo I need all information I can get abaout yamaha qt.1980 mod

do you want to mail me som stuff abaout it so hadd it been god.

my adress is lail_ska@hotmail.no

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