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Old 12-16-2007, 03:27 AM   #1
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Bolt on swing arm extension

for drag racing the stunt bike...


http://www.tocc.biz/product.php?prod...cat=333&page=1
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Old 12-16-2007, 09:09 AM   #2
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Old 12-16-2007, 09:25 AM   #3
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Old 12-16-2007, 10:04 AM   #4
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Old 12-16-2007, 01:57 PM   #5
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Old 12-17-2007, 11:48 AM   #6
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Man I would stay away from those bolt on extensions. I have personally seen several fail and its not pretty when they do. The only way I would use them is if you weld them on also...I know that defeats the purpose of them but....the bolts will pull out of the blocks or the blocks will break etc.... I just always advise against these. Not to mention its still a PITA to add/remove links from the chain when you want to pull the extensions off.

BTW when the extensions fail, your wheel will to one side, usually flinging the chain off or getting it bound up in the sprocket. I have also seen the sprocket cut into the swing arm.

If you use the extensions, weld them on, do not rely on the bolts and blocks. FYI....
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Old 12-17-2007, 11:53 AM   #7
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+1
However IF you do choose to use the bolt on extensions anyways, use high quality bolts and lock tite.
Inspect the bolts and the extensions themselves frequently as I've seen several crack.
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Old 12-18-2007, 02:20 AM   #8
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That is what I have on my bike right now. It took me a long time to decide to get them and the only reason I did was because a guy I met at the track had them on his 1k. I had debated it for a long time because I didn't se how they could hold up ,but he said he had never had a problem with them. He was the only person I had talked to with any experience of them. After I put them on is when I started to hear all the horror stories. I have only ran my bike with them at the track 2 times......last night amd the last time I went to the track which was about 4 months ago. I was gonna get them welded but as was mentioned earlier it kinda defeats the purpose of them. I will say mine show no sign of cracks or aything and the guy I talked to had ran on his for a long time (running low 9's at that) but after all i have heard i am probably gonna get a swingarm and get rid of the extensions. Would rather know my bike is gonna hold up then chance it.
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Old 12-18-2007, 09:12 AM   #9
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The extensions themselves are pretty strong, its the threads in the extensions. Also the blocks that go on the inside of the arm that the bolts go through fail. Some extensions use 2 allen bolts and those are better then the single bolt models but....I still don't trust them.....


Not that this is the same scenario but you don't want to go through anything like this at 100+mph, trust me:

http://www.motohouston.com/forums/sh...olt+extensions
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Old 12-18-2007, 09:26 AM   #10
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Out of the 5 failures I have seen, 2 have been cracked plates.
The others may have been due to improper installation (done by others) or loosening bolts.

All of the bikes in question were used primarily on the street where the rear suspension takes a pounding.


It may be a bit of a pain, but IMO the best set up for part time drag use would be to have 2 setups; a stock length chain and rear brake stay (if your bike has one), and a longer chain and stay for when you put on the plates.

The brake line could be looped like a pigtail so when you're short it doesn't drag and when you're long you can just unloop it.

I'd be willing to bet that with the right set up and tools, you could swap everything out in an hour to an hour and a half once you've done it a few times.

Is it a pain?
Well maybe a little, but it let's you keep your stock wheelbase and superior handling for the street and allows you to stretch it for the track.
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Old 12-18-2007, 09:37 AM   #11
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Old 12-18-2007, 10:06 AM   #12
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Yeah I knew about those, but I'm trying to keep it as simple / low cost as possible for these guys.
Besides, at this point most of the ss bikes don't use brake arms anymore.

I'd definitely have 2 chains, that way when you reassemble them you only have 1 link point vs 2.

I starting to think about possibly doing this to my 600 just for the of it just to see how qucik / fast it can go.
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Old 12-18-2007, 10:42 AM   #13
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Quote:
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Yeah I knew about those, but I'm trying to keep it as simple / low cost as possible for these guys.
Besides, at this point most of the ss bikes don't use brake arms anymore.

I'd definitely have 2 chains, that way when you reassemble them you only have 1 link point vs 2.

I starting to think about possibly doing this to my 600 just for the of it just to see how qucik / fast it can go.
Yes exactly, actually though, with 2 chains, you wouldn't need to break them at all...Just leave them on the arm when you pull the stock arm off, leave the stock chain on it, and when you pull the extended arm off, leave the long chain on it.

EXAMPLE:
1)Stock arm, 112 link chain, 44t sprocket, stock brake arm, remove the arm and leave the chain connected, just hanging on the arm pivot.

2)6" over arm, 130 link chain, 46t sprocket, use an extended brake arm, remove the arm and leave the chain connected.

You can easily switch back and forth between each of these setups within an hour. For me the longest part in swapping an arm is breaking the chain and riveting it back together, not to mention buying rivet master links each time.

Just thinking out loud here.....You would have to shell out about $400-500 to have a stock arm extended and a long brake arm, and another $120 in an extra chain. Then a set of adjustable dog bones and a strap for another $60, you could have a full drag setup ready to slap on or take off in an hour for $700.... Not exactly the cheapest but if someone wants to get serious about drag racing AND be able to ride the bike short on the street, this is the way to go....
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Old 12-18-2007, 10:56 AM   #14
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Well would it be cheaper to get a extended arm or get the extensions welded in and would the welded in extensions be as sturdy as just an extended arm itself???
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Old 12-18-2007, 11:37 AM   #15
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Quote:
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Well would it be cheaper to get a extended arm or get the extensions welded in and would the welded in extensions be as sturdy as just an extended arm itself???
Well if you have the extensions already, it would be cheaper to use them, pull the arm off and take it to a good tig welder and have it welded on both the inside and outside of the arm. I am sure that would be plenty sturdy but honestly, you can get an extended arm for your giggy from Canadian Mike for about $400 plus yours as exchange. It will be underbraced and come with the brake arm. Then you could sell your extensions and make some money back. It really depends on if you want to switch back and forth from stock length to extended etc or just leave it long..... a 4" arm is still very rideable on the street and twisties and helps a bunch at the strip. PM me if you need Canadian Mike's contact info.
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Old 12-18-2007, 11:41 AM   #16
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If you really wanted to be setup, you could have a complete rear with rim and tire, chain, swingarm and all. That way you can have a dedicated drag tire and everything ready to go.

Pop the swingarm bolt, in and out.
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Old 12-18-2007, 11:56 AM   #17
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In my example I was only using the idea of using the bolt on plates, not swapping entire wrms.
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