yamaha QT50 YT60 SG50 MJ50 malossi 70cc kit - ***CRACKED skirt, CYLINDER ONLY***
yamaha QT50 YT60 SG50 MJ50 malossi 70cc kit - ***CRACKED CYLINDER SKIRT***
 
  $49.99
alternate reality price $24.99

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*** CYLINDER ONLY!!! no piston, no gaskets. this is a special deal because the cylinder skirt was cracked in shipping. you'll need to cut off the cracked section of the skirt or the entire skirt before running it. the cool thing is that you can totally still rip with the skirt removed!! cheap cheap cheap so no returns! sorry! ***

here at long last is the yamaha QT50 yamahopper kit! it's a 70cc 45.5mm cast iron kit. originally made for the yamaha STING SG50, this actually fits perfectly on yamahopper QT50, TRI ZINGER YT60, TOWNY MJ50 and i believe the PW50 as well. comes with everything pictured, cylinder, piston, ring, wrist pin, clips and gasket set.

get a replacement piston here!

get replacement gaskets here!

get replacement ring here!

get a hi compression head here! If you want to use this head, be sure your spark plug is the correct model. this head uses short plugs like these. do not use the wrong plug length AND check and recheck your squish and the spacing before you run this head with this setup. or suffer the consequences. the stock head is totally usable on this setup as well, it is all in your hands, don't destroy your new kit. check everything out before you run it and destroy it. if you don't have a lot of experience with spacing things out use the stock head for now.

also probably a good idea to read this thread to get some more ideas on spacing and necessary modifications.

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3 of 5 I have been here before January 14, 2025
taco eater : Anonymous Person from Louisville, KY United States  
The last time I got one of these the skirt was cracked, I am not sure if it came that way or if I did it.

I fully removed the skirt and it gets wayy hotter way faster than without a skirt in fact it melted the piston after only a week or so of riding. Could totally be a tuning error or something. I was as careful as usual, pressure testing and sneaking up on the correct jetting, squish band etc.
My previous cylinder was bulletproof until I hydro locked it mudding.
Just my experience with this situation.

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