taco eater :
Dylan Goebel from Palm Bay, FL United States
If you're looking to replace your stock 50cc with a 70cc, this may be the kit for you. Treatland sends this kit with an Airsal semi-domed piston with a flat lip around the edge to allow you to run the stock 50cc head. Transfers have a very flat roof so better for lower RPM setups.
From my measurements:
Top of Exhaust: 95° ATDC Top of Transfer: 130° ATDC
EX Duration: 170° TR Duration: 100° Blowdown: 35°
These numbers put it in the 7500RPM theoretical peak power range out of the box.
I'd personally go with the newer cheaper "Import" kits with a proper cut 70cc head if you're looking to go for higher RPM setups.
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Also using mikuni vm20 #273 jetting roundabouts??
September 11, 2023
taco eater :
Scott H from Richmond, IN United States
To Hayden from grand rapids.. where did u end up on your jetting for the mikuni? Thanks!
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Airsal review. Best Kit for the money
May 26, 2019
taco eater :
Richard Pellegrino from Albuquerque, NM United States
Please see my review on the Malossi as it out lines the differences between this system and the Malossi. I run both set ups. In comparing this to stock, the stock mb5 when ports are polished and running the Dutch pipe with hit a higher top speed. However my airsal kit deliver balls out snort to climb long uphills and I weight 225 lbs at speeds of 65 mph. I love this kit for the price it it is hard to beat. Use the 70 cc hi comp head and a techno pipe along with the HPI ignition and hold on for dear life. The proma pipe is not as good on the high top end. Super high quality set up and so worth the little change Benin and Dana are asking for this hot kit. Really works great and runs hard. Really great kit!!
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A little disappointed
May 29, 2018
taco eater :
Conan Segar from North Myrtle Beach, SC United States
So I have now seized 2 of these at low temperatures, between 287 and 320 with correct jetting, correct break in procedures, needle set to proper position, proper mixing and a clean tank. The 1st kit seized in 6 miles of light riding, the newest kit made it through a whole rally weekend of blaaaasting in STL, I ride it to work this morning which is only 2 miles away and I walked a half mile in after the sieze. There was 82 miles put on this kit. I guess the moped God's are telling me to pay up for the more expensive kit.
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Nice cylinder
April 1, 2014
taco eater :
Hayden Butcher from Grand Rapids, MI United States
I installed this kit and a 20mm mikuni and love the new low end grunt that my bike has. I have done about 2500 miles on it now with no problems. Just get your jetting right and your off.
Average 70cc kit 
Airsal review. Best Kit for the money 
A little disappointed