taco eater :
David Bixler from South BURLINGTON, VT United States
It's a lot of work but this kit is wild! So so fast!! I welded up the sides with map/oxy and aluminum welding rods and bored out the case and transfers with a dremel. Decked it down with a piece of glass and sand paper. It came out great but I'd recommend having this done by a machine shop. I paired this kit with a super stroker crank, dellorto 19 and a MLM devinci pipe. It absolutely rips!!! No idea how fast it goes but it's straight up scary. I'd recemented getting a bunch of thick gasket paper for between the cylinder and case. I had to use three gaskets to get the squish correct which is probably the equivalent of like 6 normal gaskets lol.
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Solid Kit
May 13, 2019
taco eater :
Andy from Detroit, MI United States
Super affordable and stacked transfers! what more can you ask for!
I was able to hit 65mph on my magnum on this kit with no port work, just other engine tricks!
If you can figure out how to seal up the massive transfers, I highly suggest this kit for thrashing! And if you seize it, no biggie!
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Tomos A55
August 21, 2016
taco eater :
MSG from Los Angeles, CA United States
21mm Dellorto, case matched, 61.9 mph, 28T Front 20T Rear on an Eagle III
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best big boy pp kit for puch/derbi
May 31, 2016
taco eater :
jackerz from napa, CA United States
supper solid and ripin kit and comes with a MATCHING head! i don't have to make a crazy decision like what head am i going to get with my favorite kit? i like to use a vm20 or a 19 del race with a 38 idle on this big boy. heck, spray it black and tell everyone it's a metra but save the extra $100.. yeha..
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Used on a piston-ported Derbi!
December 27, 2014
taco eater :
Robert Smiley from Fountain Valley, CA United States
I bought the $99 one on special that was missing the head which I would have chucked anyway. I had been running a Gila 47mm giamt-reed but was disappointed in the bottom end. This one is a stump puller yet has the same top end as the Gila! Of note you DO need to shorten the piston or bore your case out for piston-only bottom clearance. I'm running a Delorto 16.16 SHA with a home made manifold and hollowed out stock Derbi RD-50 exhaust. Update: I actually used the flat exhaust version but it shouldn't make any difference if used on a Derbi PP because you're 'gonna have to make up the exhaust header anyway.
Airsal 47mm review 
