125-200cc Cracked case, cr125 - 11

Hello!

New member here

I have a cr125 - 11 that i just found a crack in the engine case by the swingarm mount.. Ill attach a photo further down.

So, how to fix this? Anyone had these cases welded with success?



Regards
Johan

that is not a big problem for a skillful welder

never had a husky cracked but another brand but welding was a simple task.

Robert-Jan

Welding not a problem.... but you need to figure out what caused it.... wore out swingarm bearings, loose mounts on front or top or frame cracked somewhere else

Perfect! really glad to hear that. Worried it was some weird magnesium/aluminium metal.

Actually it had both. Worn swingarm bearings and a cracked upper engine mount! Both fixed now tho

Not to happy with splitting the cases, think i can get it fixed without? It isnt to near anything else and behind it seems to be just air if i look at parts diagram. No oil behind it.

racemx is right, need to solve the problem of why it cracked. something is/was loose

metal putty maybe? could carefully dremel a bit of crack out(gonna get welded regardless sooner or later), clean it real good then jb weld the hell out of it. maybe rough up a bit of case around crack so it has bit of surface area to grab on to & spread any possible flex/vibes. do it properly be ya best bet though

Risk screwing up seals and bearing plus oil from crack will make it virtually impossible... Do it right or you'll be doing it again

Definately get a good welder onto that! No it's not any fancy alloy, something like 4043 filler with a good TIG unit would do. Any welder worth their while would be able to fix that you just have to clean the case REALLY well (think "you could eat off it clean") & pre heat the case prior to running the weld.

Correct! And de-grease with acetone over and over (wear gloves, acetone goes in the skin and messes with your organs).
Also drill 2 small holes at the ends of the crack to ease the stress, when welded up this prevents the crack appearing again.

Only thing is of concern is if the cases "moved" due to the crack and bearings will be out of alignment. If it's near the swing arm mount as yours is this should be no problem, if near a crank bearing this could be a no-go.