R/C Tech Forums - Novarossi 21 UNKNOWN WHICH ONE??? HELP HELP HELP HELP?????

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- - Novarossi 21 UNKNOWN WHICH ONE??? HELP HELP HELP HELP????? (https://www.rctech.net/forum/electric-off-road/242989-novarossi-21-unknown-one-help-help-help-help.html)

Novarossi 21 UNKNOWN WHICH ONE??? HELP HELP HELP HELP?????

I didnt see an engine section so I figured Id post it here.. I have a Novarossi 21 engine and I cant figure out which one it is,, the guy I got it from cant be found and the head has been changed.. I need another piston and sleeve for it as the piston shattered into a million pieces yesterday... any help would be nice and thanks in advance..
Info on motor
one side (left) says TOP 3.5 and the (RIGHT) says BT 3.5 and the
carb says TOP engines and their a number under the right motor mount 675705
it is a offroad motor and Ill get pics of the block and sleeve which it is a 4 port..

Post in the nitro off road section, they will be alot more helpful there.

LOL yeah that might help I didnt realize i was in electric!