Frame welding

[Dale Sonnenschein]

I have a 75 250 harescrambler that needs a little welding done on the frame. One exhaust bracket is gone and there is a small hole in the rear of the frame. Can I mig weld this frame? I'm new to the penton world and from all I read this is a CMF.I'm not real experienced at welding either, but I can muddle through the easy stuff.

74 puch 175 SD
73 Husky 360 WR/RT
75 Penton 250
10 ktm 250xc
02 bmw r1150r

[Kip Kern]

You sure can, if you look good, you will see small wires at some of the original welds when built!

I have welded tons of them MIG and TIG, mostly MIG though.  Good luck!

[Dale Sonnenschein]

Thanks Kip

74 puch 175 SD
73 Husky 360 WR/RT
75 Penton 250
10 ktm 250xc
02 bmw r1150r

[wfopete]

Just to throw this in:

Remove your ignition parts if they are still on the bike prior to welding, just to be safe. Also I have heard that stick, MIG and TIG can cause arcing in main bearing races and even wheel bearings. I'm getting ready to weld my modern KTM frame pipe mount and I'm getting ready to pull the motor because of this condition.

I'm I full of it or can anyone chime in?

Pete Petrick
175 Jackpiner
Slow but Good

[tomale]

I had to have a pipe mount welded here a few weeks ago, I held the mount while my friend Tig welded it.. Here is the thing, all that is needed is to make sure that the path to ground does not go through you or any of your electrical parts or the motor for that matter. This blows my mind but the you can actually weld under water as long as you stay out of the path to ground...Electricity always moves to the path of least resistence.

Thom Green,Still crazy after all these years!
76' 250 MC5 (orginal owner)
74'250 hare scrambler (project)
74' 1/2 440 maico
78' 440 maico
72' cr125 Husky (project)
93' RMx 250 suzuki

[Rocket]

WFOPete
Make sure you attach the ground as close as possible to the area you are going to weld and you won't have a problem with arcing of bearings etc.

[SouthRider]

The absolute most important consideration is the QUALITY of the ground.

It must be squeaky clean - no paint, primer, grease, dirt film, etc. to get a good ground. Clamp it tight as possible.

It's a bad ground or loose ground that causes the other problems.

_____________________________________________________________________________________

"We the willing, led by the unknowing, are doing the impossible, for the ungrateful. We have done so much, for so long, with so little, that we are now qualified to do almost anything, with nothing."

1972 Penton Berkshire 100
1983 Husqvarna 250 XC
2011 Jayco 31.5 RLDS
2009 Chevy 2500 HD Duramax