Ok so i installed one of these babys a few days ago on a red 50v. and i have to say I like it alot but don't love it.
So the stats are; Parmakit 70cc, for the AV7 usa motobecane motors, this kit was priced at around $150 from treats, but i am sure its just an old warehouse stock that was sold, there is rumor of a large batch being available again in the future however.
this kit comes with most gaskets and no hardware, the piston is a 2 ring design (plus for reliability), the overall size is a bit larger than a sock cylinder and won't turn any heads (till u blast them). the cylinder is all aluminum with a nickel chromed bore that comes crosshatched and is a 4 port design, with a large intake, massive exhaust, and large split transfers, alas there are no boost ports on this baby. All the ports are nicely rounded (even tho they look rough) but not chamfered like malossi likes to do on their kits. the transfers are large and look almost like av10 transfers.
Installation started off with me having to make my own base gasket since the one they supply is for an av10 motor and was not going to work at all. the second mod i had to do was remove the mount on the bottom end of the av7 for the variator watercover (that thing one uses or ever has on thier bike) with it in place the parmakit can fully sit into the bottom end.
removing this piece means removing the variator as well, so a short cut method would be to just dremil it down so the kit can fit.
The dual rings were also very tricky, they are big thick and brittle a forceful move here will surely result in a broken ring (already know someone who did this) so for u guys who have trouble with rings, its time to pull out all tricks or a an extra set of hands, don't say i didn't warn you.
With everything on i opped to not use the head gasket that came with the kit, it did not look up to snuff so i ran it gasketless on the top.
the setup:
av7 on a 50v
70cc parmakit with portmatched bottomend
1977's high comp head (av10 head)
15:15 dellorto with a 90 jet and unifilter
shorty 15mm intake
leovinci pipe
malossi variplus running middle weightset
the performance is quite good, however i'm having issues with the leo pipe pulling the motor in odd ways and would rather the setup using a doppler or ninga.
there is lowend bog that might be tuneable once the kit is broken in. but after the variplus hits and the pipe hits its all fun. top speed thus far is in the mid 40's and with a larger carb and or more tuning it should go faster. the parma kit really pulls well with the leo pipe the powerband is a good match (again except for off the line pop). the variplus opens fully really fast with the middle weight set, so i think the next lighter setting would be perfect. Overall it performs well but not quite as well as I would like.
I said b4 i like it but don't love it. the off the line lag is not fun, and may be due to the exsessivly large exhaust port, i think the setup would benefit with a 19mm or larger PHBG carb with an idle and progression cuicuit. tuning an SHA with a 90 main means its not going to be too happy at idle. I'm also curious as to the performance with another pipe, the leo seems to buck the motor at low rpms, i have tried mounting it several different ways but it's just not liking it.
For now i'm going to stick with the malossi 62 kit on my av7, but i think the parma has alot of potential, the acceleration of the parma is much better but i don't think it can wind out rpms as high, its just a little too much effort for a guy who has fallen to the dark side of mobys... AV10>AV7
peace
