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Author Topic: fmf 500 af headpipe springs  (Read 5088 times)

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Offline yeomans

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fmf 500 af headpipe springs
« on: March 23, 2013, 07:01:08 AM »
just wondering what people are using and where people are getting the longer springs to use with the fmf pipes for the af conversions?
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Offline alward25

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Re: fmf 500 af headpipe springs
« Reply #1 on: March 23, 2013, 05:16:11 PM »
Rocky Mountain sells different length springs but they take a little bit of looking or just give them a call.
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Offline yeomans

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Re: fmf 500 af headpipe springs
« Reply #2 on: March 23, 2013, 11:29:31 PM »
Thanks,
I thought I had heard someone mention before that they were using springs off the arctic cat sleds.
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Offline brooksie

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Re: fmf 500 af headpipe springs
« Reply #3 on: March 28, 2013, 02:52:15 PM »
I bought the SH pipe and springs. I just went to fit it tonight, and the springs they sent are shorter that the original KX500. They won't go anywhere near! Also, the U shape cooling pipe rubs on the inside of the pipe. Going to need a bit of "adjustment" there I think...
I'm off to the local sled shop on Saturday morning. It's a big main dealer for Arctic cat, Suzuki, Yamaha and Harley, so I might get lucky. If I do, I'll try and post up a part number.
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Offline hulkteam476

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Re: fmf 500 af headpipe springs
« Reply #4 on: April 03, 2013, 10:59:06 PM »
Kawa 500 original springs (pict), or and (mix) cr 500
« Last Edit: April 03, 2013, 11:56:02 PM by hulkteam476 »
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Offline yeomans

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Re: fmf 500 af headpipe springs
« Reply #5 on: April 04, 2013, 06:45:42 AM »
Those puppies are tight !!!, but their on there.
Anyone know the stock length of the springs in millimetres?
I've seen several places now that sell in many different lengths.
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Offline brooksie

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Re: fmf 500 af headpipe springs
« Reply #6 on: April 06, 2013, 05:25:10 AM »
Well, I headed off down to the local store and had a look at their snowmobile springs. They are huge! Diameter wise...
So that was a no go. I ended up ordering two sets of FMF springs. They come in packs of 5 for $7 a pop. I ordered the 85mm and 90mm springs. Ideally, you need two different length of springs anyway. The one on the underside of the cylinder needs to be longer.
I agree yeoman, the standard KX500 springs are way to short for my liking also. I bought those, but didn't even try to put them on after offering them up to the pipe.
My springs should be in mid week, so I'll let you know how I get on and hopefully be able to pass on part numbers that work.
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Offline yeomans

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Re: fmf 500 af headpipe springs
« Reply #7 on: April 06, 2013, 05:50:46 AM »
Much appreciated,
I ordered an oem set a while back, but soon as they showed up in the mail I realized they were going to be a little tight for my liking.
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Offline brooksie

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Re: fmf 500 af headpipe springs
« Reply #8 on: April 09, 2013, 01:57:52 PM »
FMF springs

Part No 002-1052   Desc: BVP 83MM PIPE SPRING/5PK

Part No 002-1051   Desc: BVP 90MM PIPE SPRING/5PK

The 83mm springs fit lovely.
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Offline yeomans

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Re: fmf 500 af headpipe springs
« Reply #9 on: April 10, 2013, 12:06:20 PM »
Quote from: brooksie on April 09, 2013, 01:57:52 PM
FMF springs

Part No 002-1052   Desc: BVP 83MM PIPE SPRING/5PK

Part No 002-1051   Desc: BVP 90MM PIPE SPRING/5PK

The 83mm springs fit lovely.

Thanks so much for the infor, very much appreciated
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