Return to puch 80cc metrakit large port cylinder kit
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3 of 5 Can we has math drunk? Friday, April 21, 2017
taco eater : Andy from Milwaukee, WI United States  
(a*(pi*(b/2)^2))/1000=74.44cc

where:
a=Puch E50/ZA50/Z50 stroke length = 43mm
b=Metra kit piston bore = 46.95mm

Sorry to burst your bubble boiz n galz but it's not 80cc. I'm sure the kit rips regardless.


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5 of 5 super fast Monday, March 21, 2016
taco eater : Darrell Brown from Lincoln, NE United States  
cant believe I got ran down from a motorcycle cop, he clocked me at 68 miles per hour, the good thing no ticket, he says he would be ashamed if I would take it to court in front of a judge,   puch magnum ===== lots of treatland goodies

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5 of 5 Crazy Fast Wednesday, September 10, 2014
taco eater : Ron Sparaco from wrightstown, NJ United States  
Gps 62mph 9500 rpms. 05 tomos lx. A55 engine. 30/20 gearing 24mm tm flatslide  mikuni carb  simonini pipe

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4 of 5 New castings are poor, but it will rip. Thursday, April 17, 2014
taco eater : daniel from Seattle  
great kit and really pulls hardest with an 8p in the 8-11k range. the only negative thing i can say is the quality has significantly been much worse with the last kit I bought. both intake and exhaust surfaces had been coated the same as the kit, but had a lot of imperfections and raised casting bumps, also around the intake studs(which are pressed in) its all weird and raised up. the exhaust threads are also wayyy  shorter than they should be and i could only fit a 15mm bolt inside and those even got a little stripped on the very end. I helicoiled both holes and it's been great. all and all probably worth the time and money putting this kit together right, does better than a gila in the city, and blasts the frenchies in the top end.

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5 of 5 This is why you can't keep up. Wednesday, March 6, 2013
taco eater : Long Beach Mopeds from Long Beach, CA  
Not for children.

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4 of 5 Ripper! Hang onto your hats Sunday, July 8, 2012
taco eater : Nathan Barrett from San Jose, CA United States  
Added aluminium to E50 cases, matched all the way down, super stuffy crank, kehin pe20, NGK B8HS, and homoet 8p. Shit is fast! Powerband hits at around 20 from there on after you better hang on for dear life. Big massive fins cool down quickly, and its cast iron bore is almost idiot proof (in terms of seizing). No reed valve so your filter will get oily, but its not like it'll ruin your pants. Only thing left to do is get a 3shoe clutch and maybe attempt mild porting. Very satisfied indeed.

Oh yeah and the black finish looks like sex on my black swinger

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1 of 5 Exhaust port problem? Saturday, July 31, 2010
taco eater : Robert Smiley from Fountain Valley, CA United States  
This kit is actually designed and sold by Metrakit for the Puch "Condor" which we don't have over here on this side of the "Pond".  I used it in another Derbi piston-ported project and it seized up just below the exhaust port . I was using known-good carburation, exhaust, timing, extra break-in oil, etc.  Upon disassembly-inspection the problem was very likely due to not having a "bridge' across the huge and (TOO?)WIDE exhaust port.  I believe that the rings DID NOT have enough "support" and would "grow" into the port and cause the problem but I can't swear to it. I've been doing this stuff for 15 years now but, hey, I'm still learning!  Anyone else have this problem?

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5 of 5 Great kit Sunday, June 21, 2009
taco eater : Mars from Boston  
Current Setup w/ MK80BP:
19 PHBG
90 main
Estoril pipe
17x45 gearing

Still breaking the kit in, but so far there is no hill I can't destroy.

Exhaust mount surface is a bit uneven, but the big crush gasket makes up for it. Making room for the cylinder in the case is a lot of work like any other 70+ kit, and to do the port matching, some material will need to be added, or you can simply not match 100% like I did.

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