My first time swapping out the motor in my SR3 RS. (This is different RPE motor, not a rebuild of the original). Everything fits together fine: cradle studs all go in (with the spacers), GDU coupler fits right, and 5 of the 6 upper triangular brace bolts to the head fit
right, but the 6th pictured here isn't even close. I drilled it out a bit for a bit more allowable play, but it isn't close. All fit fine with previous motor. Anyone else run into this? Big problem if we just leave it at 5 out of 6? I don't want to make custom triangular fitting.
Are all of the other mounting bolts loose? If all of the mounting bolts are loose you should be able to get the engine into a position where all of the bolts fit, and then you can start tightening them. You should not drill to make more clearance.
Yup; loosened everything. Tightened in different orders. Of course I could fit the outlined bolt but then the others don't work. It's a mystery
Strange one that Gordon, the engine mount points are the same for all the Busa engines so it should fit straight in.
As you removed an engine that was fitted with all of the bolts then it must either be a fitting problem or something wrong with that engine?
Has the engine had any mounting points repaired?
Did you get sorted with the output coupling and are you completely happy that it is sat in correctly? On the change over from Gen 1 to Gen 2 Radical stopped using that chamfered washer as a stop bolt in the end of the output shaft as with certain GDU's it would bottom out before the coupling was completely engaged properly.
Can you get the rear main frame spacers in place ok?
I have often found getting the mount bolts into the cylinder head loosely to start with and then the main mount bolts through the chassis after easier as you have a bit of play in the bushes.
Even with the rear mount bolts in place either a jack gently under the engine or a crane lifting the engine slightly might give enough movement to get the bolt in?
