Where are you buying them from??

Is it a EFRA type crank? As these seem to be the only ones breaking. No one that i know of at the worlds had a drama and they were all IFMAR cranks.

I have come to the conclusion that my engine is just plain worn out. Can push the piston all the way to the top of the liner.

got the 2nd one from kyosho usa cuz i broke the 1st one and its a sti ifmar why just the sirios and not all my other motors, all my other motors they just wear out and get old so idono.

i have two sti's and 2 evo3's and i have only broken the cranks on the early evo3's before they fixed the crank.
how do you run them in?

heres a little info i got at the worlds from the sirio boys. they said the sti's work best with sirio 7 plugs and the sirio 2611 pipe. they ran effortlessly through all the 10 days!

Wally, you can't run stock gearing in Hamilton especially since you enter the straight via a sweeper. You have a huge run up to the sweeper plus the straight, that's alot of stress on a motor with stock Mugen gearing. My RRR's second gear ratio is maxed.

Dave

the first one like josh and the 2nd like my novas,on the box for 2 then on the track rich.la la la la

the thing dident run out and if i went up it would realy be dogy on the staight i tried that.lol I told you that on sunday.

my novarrossis did not brake so why dos the sirios do,LOL maybe i need a RRR.

i had a look and for the main i ran a #7 sirio plug

hmmm..... maybe it had a defect?

was the engine modified?

I wonder how the Nova 12+3 fairs against the Sirio STI???

no i dont do that stuff

Ask Uriah. He probably knows.