Exhaust Stub cross head screw removal

[r1_pete]

I have a K2 engine with the cross head screws holding the exhaust stubs in, they look lik ethe type of screw which are a real pain to get out, anyone have any tips?

Also, once removed, does anyone know if F1 pipes will fit?

[hairygit]

A decent impact driver generally gets them moving, make sure the driver bit is a good fit in the screw, 9 times out of 10 they'll loosen quite easily, DON'T be tempted to try ordinary screwdrivers, as if the screwhead gets damaged/ chewed, then the problems really start

[mick]

Hi Pete i've gone the opposite way and fitted stubs onto a F1 engine with no problems so you should be able to fit an F1 exhaust on there but you will need the

exhaust studs and colletts, cheers Mick.

[r1_pete]

Cheers guys, I can make the studs and collets, I just like the look of the F1 4-1, its goimng to finish up quite a bitsa, F2 Chassis, K2 engine, F1 exhaust......

Off to machine mart now for an impact driver.....

[SteveD CB500K0]

I've got a set of collets.
I don't know what they're from (other than that they're off a 750...) but you are welcome to them for the postage cost if you want them.

There are 8 of them.

[mick]

They look like 750 F1 Steve  cheers Mick.

[SteveD CB500K0]

The title of the picture is a bit of a giveaway...

[K2-K6]

Just to add to the other advice already given, I start by using a broad faced punch (you can use an old socket extension bar) to "peen" the edges of the cross into the gaps slightly. Then if you get the impact driver bit on it's own you can tap it into the screw to get a really good tight fit. Finally fit the impact driver and wallop it with club hammer to make it move before you loosen the fit at all.

As the others have said, these usually don't give too much of a problem as long as you don't round them out.