Originally Posted by hydrakermit

Hi all,

My names Josh,

I wonder if someone can help, sorry if this has been asked previously,

When I first assembled my BD7 15, I couldn't tighten the little M3x6 flat head screw that goes into the layshaft, if i do, when the drivetrain runs forward the whole drivetrain locks up, as the car was new i didnt want to over tighten it, so i decided to slacken it up (maybe a little to much) on the first run with the car, the screw and bearing flew out during a race and I lost them.

Is there anything i can do to prevent this?

I have brought new screws and the washer and bearing that I lost and put a little thread lock on a M3x6 flat head screw, this has so far worked for 5 rounds.

Ive heard I can use a button head screw without the washer, but im unsure what size screw, maybe M3x8 Button head?

Just wondered if anybody has/had this problem and what you have done to prevent it, also wondered what you lot are running.

I have attached a pic of the screw in question, the pic shows someone using a button head screw with no washer, hence the question.

Any replies and help is appreciated.