crazypj said:Not too sure the exhaust studs are a good mounting, they do fail due to heat/cooling cycles without any added loading
The frame looks super stiff though, are you going to slot something more powerful in at a later date?
sxecafe said:This thing is clearly a feat of engineering! Coming from a complete novice stand point, it seems like over kill to me, in particular the frame. What's the mindset behind all of that fabrication? I know that you're giving the motor a nice kick in the ass but a normal 500T frame doesnt have that type of reinforcement. Again, this is coming from a place of wanting to be educated, not talking shit on what you're doing.
mydlyfkryzis said:While the front mounts to the exhaust ports looks tough, I don't think the exhaust ports are really design for anything but an axial load. The side loading on that area seems a little iffy, as there is not a lot of cylinder structure right there.
For actual strength, you might do better on the upper head mounts. Much more structure to support the bolts. I suspect your mounts and frame are very strong, but not so the exhaust port area of the engine. an appropriate bracket for those heim joits would really be a tough looking and actually tough, mount.
Heck, those exhaust studs break just holding the exhaust pipe, never mind a mean dog of an engine. I think your mounts and bolts are going to be strong, just not the threaded head area.
Swivel said:The heim joint swingarm bushes will not work right:it will provide "rear wheel steering".The swingarm shaft appears to be too small for strength in the images.
The weird heim joint construction for the exhaust studs will not be strong,stable or rigid enough.
Y'r a CAR GUY right? .
Kind of agree, Looks cool though!
cyclhed said:Here are some new pictures. It's a roller. The exhaust stud holes will be plenty strong and the heim joints won't produce "rear steer" - not possible. Anyway enjoy.
crazypj said:Swing arm will be fine
Harley D use something very similar with a lot more weight and torque going through pivot.
May have an issue with wear as the bearing surface isn't very wide
I recognise HD hubs, what rims are you using?
Sonreir said:Is that just supposition, or can you share some info about that? My understanding of Heim joints is that they allow some side-to-side movement as well as up and down. I don't think that's something you really want in a swingarm.
Also... what are the reasons you think that the exhaust studs will be sufficient? I've seen these things break with little more than the weight of the exhaust on them. Heat cycling, I think, makes them brittle? The load you're expecting these things to carry is significant. That's even before you take into consideration the torque of the engine when it's running.
From what I know (and I'm always looking to learn more, so please share with us), both of these decisions don't seem like good ideas.
Just to be clear, I'm not being sarcastic. If there's something I'm missing here, I want to know about it.
Autotek said:Is the chain tension to be adjusted at the heim joints?
cyclhed said:Tell PJ front hub is narrowed Harley as he said, ft. wheel is 16 x
3.250" 40 spoke, don't know what brand. Rear is 16 x 4.250 Akront 40
spoke. Plan is to change rear hub to aluminum Harley to match the
front but who knows when, as I don't like to spoke and true, the front
was plenty for now.