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Let's Talk About Swingarm Length


FireHead

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Like the title of the thread states, how does a person go about figuring out what length of swingarm is best for a given application? What are the advantages and disadvantages of the different style of construction, and different materials? What are the advantages of having a link vs. no link arm? Is you swing arm choice effected by the type of shocks you are going to use?

 

I am trying to figure out the swing arm length I need for my triple and it's frame. I am not really sure how to shoose a good set of paddle tires to start with. From there on I think I can make an engineering case for several lengths of swingarms. So, I'd like to see how everyone else chooses their swingarms. :thanks:

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buy one of each length and start at stock and move up until you cant lift the front wheels then go back one :)

 

you going to be hillshooting your tripple or drag strip? i know the no link runs ery well on groomed track but not too sure how well they holdup on somethink olds where the whopps get bad mid season...

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I ended up with a +6. I wouldnt want any more for the dunes. Its a handful to turn but I can. Since I also want to hill shoot I started adding power till I feel I'm maxing out the +6. I am currently using 22x11x8 9p with 6lbs air and they make it even harder to turn but it works great on the hill. I'm makeing 70+ ponies to the wheels. Hope this helps

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you going to be hillshooting your tripple or drag strip? i know the no link runs ery well on groomed track but not too sure how well they holdup on somethink olds where the whopps get bad mid season...

I going to be doing both hill shooting and sand drag racing. Probably a great deal more hill shooting. I am sort of leaning towards a linkage style arm, but I would like to hear some other opinions about it so that I can feel better about my decision. :geek:

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I ended up with a +6. I wouldnt want any more for the dunes. Its a handful to turn but I can. Since I also want to hill shoot I started adding power till I feel I'm maxing out the +6. I am currently using 22x11x8 with 6lbs air and they make it even harder to turn but it works great on the hill. I'm makeing 70+ ponies to the wheels. Hope this helps

It helps a little bit. My red bike puts 72hp down to the rear wheels and I am well within the operating limits of my +4" arm. If I were just duning I wouldn't put anything more than a +4" arm on my bike.

 

However, my triple is probably going to be putting out closer to 180hp at the rear wheels. So. now you can kind of see where my personal experience gap is. :thumbsup:

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Trips rip. I would think at least a +12, +14 with 14p and hold on. On the flat drags much shorter with a bar.

I have pretty much no experience with a wheelie bar..........................I have no idea what to do once you throw that in there. I know you're right, but how to put a number on the arm legth I need is tough. :thanks:

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yea i was going to say you can get a little info here for that beast but if you want to do it right bite the bullet and hit PS... only a handful of guys here can give you the right answers for that thing and not just something they read off another post.. go to where its a normal thing and get your info right out of the horses mouth

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180 hp???!!!! Go longer. Sounds like you need to take a ride over to PS for that bad mofo.

I don't like Planet Sand very much. The population over there is mostly a bunch of folks with too much money, that don't work on their own stuff, and pretty much talk out their asses. There are a few good industry folks over there, but you have to listen to 10 people, who have trouble getting out of bed in the morning without getting hit by a truck, tell you about something they heard about once, that some other guy saw. :shoothead:

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They dont care for duners as much but they are very helpful. They helped me out a lot. Just be patient and persistant. Now that your moving up to the big time they will probably much more receptive. I think if you wnat to get top of the line stuff they are mostly saying GT performance I think. He builds nice swingers that are designed to put the power down. I'll go see if I can get a link.

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GT Performance

 

I would also call around some other places too like K&T A&S Ohton and whoever else you can think of.

GT definitely does good work. Before I start shopping for an arm by vendor, I would just assume get a better idea of what I need. I have recieved alot of reccomendations so far, but they seem to be all over the place and no one has really been able to back up the reccomendations with a technical explanation. :confused:

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