in my country that last question would be understud like a threat or an insult and not like a smart observation and advice of the moderator.
But perhaps in your country means somthing else ???

the blocks of e90 arent the same of 50...........there is a diferent crankshaft and diferent space betwen that bolts that are holding the cylinder........bore X stroke is 48x48...............the stock cylinder is made of aluminium and is totaly diferent than the 50 cylinder...............and to enla...

i think that i undarstad what you wrote.............but there are two diferent engines on aprilia af1............i was talking about minareli rv4 engine(the water doesnt goes trough the block).......not the am 6........sure it takes a lot of work to fit it on tomos block...........the best with a di...

yes maybee the cylinders............ but doesnt the honda nsr have a diferent bore x stroke.......i think 39x41............or I m wrong??.............i think that the best cylinder for LC is the aprilia af1 cylinder.......cause has very similar bore x stroke........... 38.5 x 42 i think..........and...

praatpaal from other topic heh...........yes it must be done very precise................and if it is done right there is no way that the cylinder( A5 ) owerheats............the drilling, portening( both in a workshop) and a new piston comes around 30 eur.....................and the head can be lowe...

das anybody have or had a problem with a crankshaft if mounted a 70 ccm kit, sport exhaust and bigger carb ???........and if you had a problem how did you fix it???

thanks for answers

sitt

thanks for the tip

we can get only polini for puch, or raptor kit............but almost nobady buy this kits............the most of people just drill the cylinder at diameter 42 mm and fit a bigger piston............this is very cheep to do and it is very good............but the crankshaft is not strong inaf ............

hehe i live 500 m from the tomos factory 8) ...............my cylinder was tuned in the factory reaserch department................but now they have bad days...............here in Slovenija nobady wants to ride tomos mopeds any more...............the only thing that holds them up is export.............

if you change the stock cylinder with a 70 ccm kit cylinder do you have to change the crankshaft too???.........or only the connecting rod???.........do in your country sell the rinforced conecting rod????

ammmm......that vas 3 years ago...........i dont ride mopeds any more..........but i had dellorto 26 , mf power exaust , meteor piston with L ring, lowered head , polished and encrased canals...........with 15/27 sprockets i had a top speed around 140 km/h and very good acelerations...............bu...

hehe yes.........the bigest problem is the rear swing arm...........i twisted it twice.................then i fixed the engine on atx frame ................

das anybody know how much hp has the 70 ccm kit???..........and the deegres of port opening???

if anybody is planing to place a E90 or 80 engine on a frame of tomos automatic it wont fix directly, cause it has not the same holes on the blocks..............and another problem is that has to much power an it will twist the frame............. ........E90 engine has 5 gears and the 80 ccm too.......