Next project, looking for pointers ahead of time

[darwin]

If you have an alloy frame shouldn't the same alloy be used to repair it with?

 

[LewieBike]

if you are welding it there will be stress risers internally to the welded material that will make the repaired area cause new cracks to form. there's a difference between 6000 and 7000 grade aluminum, I think you can get away with welding 7000 grade aluminum easier, there's less annealing or heat treating required for the repaired piece. I suspect they make different welding rod for different aluminum grades.

 

[Frogslayer]

Ok guys all welding aside lol, i have a 66cc on that exact bike. Basically, the motor doesn't fit. The frame is still solid no cracks yet but i did put suspension forks on it and a 6 speed rear hub and derailleur and front and rear brakes. The wheel base is really small on this bike as well, lean back throttle wheelies are totally a thing. The only reason i used this bike is because i already had it. I would not recommend it to anyone.

 

[mcdanida]

I've always heard aluminum should be tig weld if a strong weld is required

Aluminum is probably the most versatile welding mediums on the planet. Stainless steel takes a very skilled welder, and if you want the best of the best, find someone who knows how to weld titanium. I bet if there are bikes out there that are titanium, they are probably the best for motorized.

 

[HumanPerson]

I think maple is easier to weld than willow though

 

[Chainlube]

I think maple is easier to weld than willow though

You don't need to weld willow, it can be bent and tied with ease. Now that birch is hard to weld.

 

[Axl Myk]

Now that birch is hard to weld.

As is Ironwood.

 

[MotorizedPickle]

I learned never to use an aluminum frame after my second build snapped completely in half after going over a small speed-bump lol.

 

[YetiWoodz]

I learned never to use an aluminum frame after my second build snapped completely in half after going over a small speed-bump lol.

Wow. What frame was that?

 

[Deleted Member 4613]

My fiberglass frame beats it all, completely flexible and never rusts.