need help buzzing sound on break in
 

first of all i hate to double post but i posted it in the hpi section and it doesnt even look like anyones reading it so hopefully i get a responce here as im really concerned my new savage which isnt even 4 hours old is gonna go to crap on me


i got a savage with the .25 my fuel is 20% nitro 16% oil (i figured the higher oil content would be better for break in)

started it up began the heat cycles as reccomended by the hobby shop and a freind of mine heated up to 190 shut the motor down (finger over exhaust) turned it to bottom dead center let it cool to 70 everything went great

it was suggested to me to richen the low end 1 hour (not even a quarter of a turn) so i did this hard to restart finally got it restarted and it was making a high pitched buzzing sound bbbbbbbbzzzzzzzzzzzzzzzzzzzzz (probably just liek your imagining) like metal vibrating against metal gave it a quick look while it was still running seen nothing loose ........

got worried killed the motor

is this noise normal and im just being paranoid or should i be concerned?


also is the one way bearing problem fixed cause it seems to me mine wasnt catching all the time

im not new to rc but this is my first brand new truck and my first break in ritual

RE: need help buzzing sound on break in
 

Im not sure what that noise is, but if i was you.. i would take it to the LHS and ask for help..

RE: need help buzzing sound on break in
 

Might be the header vibrating against the chassis. If you look under it, you will see the header may be contacting the top of the chassis plate. A design flaw courtesy of HPI. Mine rubbed so much it almost wore a hole in the header. I wrapped a piece of a silicone exhaust coupler around mine to stop it. Start it back up and get it to vibrate, then start feeling around the truck for it. It's more than likely not engine related at all.