My 21 comes off from a 30 min a main saturday night at 168 degrees and getting 10 minutes on a tank of fuel..got to love that!!

Nice what are ur settings on your needles

where can i get an extech 21 engine coz i am in need of a good engine that i dont have to break in and what pipe to use
thanks

A GRP carb will work and a Novarossi for .21

I need a new head button for my Race Prepped .21 and A-main is out. Anyone know which of the Siro or Werks turbo head buttons will work?

Cool thanx so basicially i can use the carb off my RB

what size is the inner bearing on the .24?? tks

Neither i have tried that before and you will never get the right tune on the engine. I dont care what anybody tells you. Id call Trinity to see if they have any instock

I was tearing down my Extech .21 to replace the connecting rod and noticed there were no head shims. Is that normal? My RB came with 2 from the factory. I was thinking about using my RB carb as well. Any feed back as to how it performs as well as base line needle settings? As far as Dishsoap’s issues are concerned, mine acted the some way and it turned out to be a worn out connecting rod where it connected to the crankshaft pin.

Rick

Hello Rick,

Is this the extech 1 or 2?

Pay close attention on bottom of the cooling head the shims are silver.

Thanks! I will take a look tonight.

Rick

I am not sure. I bought it over the Xmas holidays. It is not modified. It is box stock.

Would have to check them out, I do not go by so many turns in our out from flush, I tune to conditions. Saturday was in high 80's, saturday night, temps dropped down into the mid 60's.

It is a part number TRI40060. How many shims should the be?

Rick

You get the mill close to that 185 mark and then tune from there. Run a good hard clean lap & check your time, smoke, & temp. Then give it another run & check that time/temp/smoke. This is a very efficient motor, not alot of heat escapes it so your temp gun reads cooler temps then most other motors will read in.