taco eater :
Matthew Mulligan from terryville, CT United States
Didn’t have the exhaust port clearance issue everyone else had. Maybe a new batch? My exhaust port was actually a bit higher than the piston at bdc and needed to be lowered.
Check my review on “puch 70cc absolute treat party supreme“ for other details.
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Something's changed
November 18, 2017
taco eater :
Wesley Brown from Austin, TX United States
I ran 2 of these kits for over 1000 miles a piece with no issue but the last two I've bought have puked wrist pin clips into the cylinder.
I've checked positioning on both, maybe they're using new wrist pin clips now?
edit treats : nothing has changed at all! if the wrist pin clips are consistently causing you issues maybe try some of the malossi or polini ones.
edit wes: Just an update on this, I knew something had to be different between the previous builds I've done and this one. I looked through my orders and it ends up I used a wider needle bearing on the piston side.
I ordered a 12 x 15 x 16.3 bearing and have been running this kit successfully for the past year. Just a heads up that the piston opening for the connecting rod is wider than stock and as such, don't use either a stock bearing or the one that comes with a crank as it'll walk, unbalance your piston and you'll be puking piston rings for days.
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What size bolts for the intake?
August 4, 2017
taco eater :
Nicholas Colaianne from Grand Rapids, MI United States
I wanna ride! but the metric bolts I had didn't fit...
Looks like a good quality casting, and went on nice and pretty. My cali sidebleed doesn't fit perfectly but it's close.
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5 years strong
July 26, 2017
taco eater :
Ismael Canas from Imperial Beach, CA United States
This is a really great kit to learn on. I've been running it since 2012. Made tons of mistakes, learned a lot, and it keeps on running. It's as close as you can get to seize-proof. Definitely convert the piston to run clip-less wrist pin clips, it takes maybe 2 minutes.
Current setup: Vm20 170 & 17.5 Weak-ends pipe from 2012 Malossi 4 petal Counter-sunk head @ 1mm squish Treatmetric Clutch w/ light springs Timed 18deg BTDC 16x40
Hits 60mph regularly, fastest was 63.7. Gearing better would help, but the low end is nice. Takes a little to get there but it's a heavy ass magnum.
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Echoing the same concern
May 5, 2017
taco eater :
Boogaloo from Omaha, NE
These kits are great!... until you a circlip destroys your cylinder. Ive purchased two of these kits in the past year, both have blown up due to this malfunction. Definitely not user installation, both times, the clips were installed in the correct position. So yeah man, this obviously isn't a controlled issue. Maybe include some better clips? I dunno. Breathe in, Breathe out, throw in garbage.
Sickk 
5 years strong 
Echoing the same concern