repairing yz10 '94 cf chassis

[Naushad]

I have a yz10 '94 chassis which is essentially intact.

However one of the front corners (where the screwhole is) seems to be a little thin and chipped.

If an impact were to occur then it would almost certainly break.

Can anyone recommend how I can repair this? Could I use a carbon fibre repair kit. How would I apply this?

Many thanks.

[charlie2]

best i would suggest is try and get some epoxy resin and repair with that. pre-preg carbon fibre is virtually impossible to repair so epoxy resin i would say is the only answer.

[Naushad]

Hi thanks for your reply.

That did cross my mind, though I thought cf would be easier.

I would need to mould it carefully i guess once applied?

[dodgydiy]

as above, definately epoxy. if the chassis has started to delaminate (split) then run some thin cyano down the split then rebuild with epoxy. get a strip of lexan or similar plastic, apply a little vaseline or similar to stop it getting stuck and tape it upright around the front edge securely, you can then fill the damaged area tidily. i put tiny offcuts of raw carbon matting in with the epoxy mix when i do it, makes it all look a little prettier, but thats only because i always have little bits hanging around from one project or another

[charlie2]

basicaly pre preg carbon fibre does not repair well.epoxy resin when cured is very hard and durable hence why it is used with carbon to give it the strength that is associated with carbon fibre.get some plasticine and build it up around the area to make a dam and carefully fill with the resin trying to get any air bubbles out,dont do it in the house it will stink!.if you tryed to over lay carbon over the area it would not bind to it properly and come away from your chassis.dont get polyester based resin as that is very flexable and soft compared to epoxy.

[Naushad]

That'a a good idea from someone who does dodgydiy!

Thanks for that!

I understood the idea, so I'll do that!

Regards

[Naushad]

thanks for that helpful advice Charlie.

If you are familiar with the YZ10 '94 chassis you'd know that those corners are small.

I can use some blu tack I guess: around the corner and in the hole?

Naushad

Originally Posted by charlie2

basicaly pre preg carbon fibre does not repair well.epoxy resin when cured is very hard and durable hence why it is used with carbon to give it the strength that is associated with carbon fibre.get some plasticine and build it up around the area to make a dam and carefully fill with the resin trying to get any air bubbles out,dont do it in the house it will stink!.if you tryed to over lay carbon over the area it would not bind to it properly and come away from your chassis.dont get polyester based resin as that is very flexable and soft compared to epoxy.

[Naushad]

So I had a quick look on ebay and they sell cheap epoxy resin/hardener kits.

Are these 2-part kits what I need?

If not does anyone have suggestions or alternatives based on experience.

[Naushad]

http://www.ebay.co.uk/itm/Epoxy-Putt...2bb7b00&_uhb=1

This looks promising...less mess and better precision?

[CAT3K]

I used petrol tank repair putty on a touring car chassis that had a few chips at the front. It sets rock hard and can be coloured to match the chassis once dry. If the chassis is delaminating though, i'd epoxy it first then fill, mine just had a chip.

[dodgydiy]

http://www.cfsnet.co.uk/acatalog/West_Resin.html is the stuff i use, have tried others but settled on these. the mini pack would do you, i use the larger ones and the delivery pumps to get the correct mixture each time. you could use blutack in the hole, if you do then put cling film around it and coat it to stop it sticking. personally i would just redrill the hole afterwards, strip of lexan is by far the best around the outside, just use very thin stuff if its a small area. oh and avoid fast set hardeners and just put it in a warm place for a day or so to help the resin cure