Taking of Head and Barrel

[tribonnie]

Hello all, bit of advice. Getting to the point of taking off the head and barrel on my Jota
Anyone have any tricks on how to control the two ends of the chain as I lift of the head and barrel
If one end does drop into the crankcases does the the cable guide in the bottom of the case stop the chain coming off the crank sprocket.
Any other tips on doing this.
Thanks Richard

 

[The Sock]

Tie them with a length of 5 Amp auto electrical wire round the rollers second out from the joining link.

 

[Haggis]

The chain guide will stop it falling off the sprocket, but then the ends are a bugger to get to in the crankcases and might 'fold' inconveniently and miraculously trap themselves.

Add some long wire to the chain ends. As you lift off the head, get a buddy to control the chain and hold it up and out.

Or do it all upside down. Our buddies in Australia have the advantage there.

(Sorry Hamish - posted at same time)

 

[Dellortoman]

Tie them with a length of 5 Amp auto electrical wire round the rollers second out from the joining link.

Does it have to be 5 Amp?
Actually, I use a bit of steel tie wire about half a mm thick. It's easier to bend into the shape you want and holds its shape better than braided and insulated electrical cable.

 

[chrisk]

Plastic coated stainless steel garden tie wire, works a treat too. Non scratch and conforms as Cams .5mm tie wire does.

 

[Vince]

Shoelaces.

 

[tribonnie]

Thanks for info, seems the only thing I have to worry about is what sort of wire I use. There’s me thinking it might be a bit more technically complicated. Thanks again, Richard

 

[Paul Marx]

Thanks for info, seems the only thing I have to worry about is what sort of wire I use. There’s me thinking it might be a bit more technically complicated. Thanks again, Richard

Don't trust that bottom chain guide to keep the chain on the crank sprocket. Keep it taught.
Might be better to take that chain guide off anyway because it will a) allow you to peer down the chaun tunnel more easily, b) pull the chain back up if you drop it, c) make sure it was mounted the right way around.

Paul

 

[The Sock]

Don't trust that bottom chain guide to keep the chain on the crank sprocket. Keep it taught.
Might be better to take that chain guide off anyway because it will a) allow you to peer down the chaun tunnel more easily, b) pull the chain back up if you drop it, c) make sure it was mounted the right way around.

Paul

If you're going to follow Paul's advice, take note, and photographs, of the position of the joining link when the cams are lined up. I found it's easier to join the chain up when it joins on top of the exhaust cam sprocket with all marks lined up.

 

[AndyW]

I use shoelaces and tie them off to a couple of heavy spanners (or similar) so that the tension is maintained when you lift the head on the studs…

 

[Dellortoman]

I tie balloons to the ends of the chain and do the disassembly underwater.

 

[Paul LeClair]

when putting the cam chain back together, be sure to stuff rags down all the spaces and holes the chain link clip could drop down........

 

[tribonnie]

Thanks again, wire and rags at the ready just need to find 10mil socket

 

[AndyW]

Don’t forget your balloons and dive watch…

 

[tribonnie]

Head and barrel off, 4C cams and high comp pistons, luverly jubley

 

[The Sock]

Remember to check the cam timing, as per Phil's guide, after you've fitted the new cams.

 

[1200 JOTA]

it all depends on how OCD you are ... sometimes I just approach a problem / fix / parts etc. as

" ... hour 23 of the 24 hour race, so get the f*cker out there and see if it holds!"

 

[chrisk]

Thanks again, wire and rags at the ready just need to find 10mil socket

Hint: Look for one that reads 10mm, much better than a Columbian cocaine straw..