About 3 weeks ago my chain de-railed. It didn’t seem like my chain was too loose. Then a few days ago I was about to go for a ride and noticed my frame was broken. I pulled my swingarm and found major cracks. Apparently the chain de-rail is a sign of a cracked swingarm. Both my frame and swingarm are trash and I haven’t had any major crashes.
Surron Ultra Bee Broken Frame and Swingarm
- Thread starter Yz450f
- Start date
It’s all aluminum. I said that it was “cast” in the video. Actually it is die-cast. That is where aluminum is cast under pressure in a die (form). And to answer your question. It is weldable. I have a TIG welder that will weld aluminum. I’m still debating repairing it.
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- Lake Havasu City, AZ
Sorry, @Yz450f, it hurts to see bikes break like this.
Whether the frames or swing arms are boxed or not boxed determines flex characteristics, not the maximum strength. You just need to make the aluminum thick enough. KTMs use die-cast open lattice, or open-grid, aluminum swing arms on their street and heavy adventure bikes with no issues.
I had to re-weld my 1995 CR-250 swing arm welds on both sides three times after they cracked one after another. This was back in the 90's. Once plenty of extra aluminum was added, the welds didn't break again. Those were welds though... You can re-weld and reinforce your swing arm, but for the frame, you'd need to add gussets and reinforcements.
If you are planning to re-weld the frame and the swing arm, more power to you. If not, here are some project ideas that I just saw today
Whether the frames or swing arms are boxed or not boxed determines flex characteristics, not the maximum strength. You just need to make the aluminum thick enough. KTMs use die-cast open lattice, or open-grid, aluminum swing arms on their street and heavy adventure bikes with no issues.
I had to re-weld my 1995 CR-250 swing arm welds on both sides three times after they cracked one after another. This was back in the 90's. Once plenty of extra aluminum was added, the welds didn't break again. Those were welds though... You can re-weld and reinforce your swing arm, but for the frame, you'd need to add gussets and reinforcements.
If you are planning to re-weld the frame and the swing arm, more power to you. If not, here are some project ideas that I just saw today
Thanks, I’ve owned many Yamaha and Honda dirt bikes. A couple Kawasakis and a Husqvarna dirtbike. I’ve broken bones, my back, wheels, and numerous engines, but I’ve never broken a frame or swingarm. I’m in my 50’s now and his bike has not seen anywhere near the abuse that I was once capable of dishing out. I’m shocked that this bike is only a couple years old and breaking up.Sorry, @Yz450f, it hurts to see bikes break like this.
Whether the frames or swing arms are boxed or not boxed determines flex characteristics, not the maximum strength. You just need to make the aluminum thick enough. KTMs use die-cast open lattice, or open-grid, aluminum swing arms on their street and heavy adventure bikes with no issues.
I had to re-weld my 1995 CR-250 swing arm welds on both sides three times after they cracked one after another. This was back in the 90's. Once plenty of extra aluminum was added, the welds didn't break again. Those were welds though... You can re-weld and reinforce your swing arm, but for the frame, you'd need to add gussets and reinforcements.
If you are planning to re-weld the frame and the swing arm, more power to you. If not, here are some project ideas that I just saw today
B. FRANK
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while being cool as can be sur rons are still toys not motorcycles. frame, suspension, wheels and brakes prove that. at 67, 6'3" and 260 lbs i chased the sur ron dream...i"ve since made a complete recovery!
Probably why Surron hasn’t put big fork and shock stiff shocks more rigid fork on Ultra bee
will put all the flex in frame and swing arm on the little play/trail bike. Possible maybe time to graduate a Stark Varg.
HadesOmega
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Wow never seen that before you coulda got a lemon. I have a Sur Ron Light Bee MX that I've beat the crap out racing for 7 years now. I have broken nearly everything on it but I haven't cracked the frame yet. I have cracked the swingarm and yeah the swimgarm is garbage on the Light Bee at least for what I'm using it for. I bought KO Moto swingarm and way stronger.
I remember Nate from charged cycle works's bike this year he was racing at the EMX championship race had problems with his chain coming off on his Ultra Bee. It's the swingarm is too flexy and when it flexes too much the chain gets thrown off. I have the same problem with my Light Bee also so I don't MX race it anymore.
I remember Nate from charged cycle works's bike this year he was racing at the EMX championship race had problems with his chain coming off on his Ultra Bee. It's the swingarm is too flexy and when it flexes too much the chain gets thrown off. I have the same problem with my Light Bee also so I don't MX race it anymore.