KX Riders

Maintenance & Technical => KX500 Aluminum Frame Conversion (AFC) => Topic started by: yeomans on March 23, 2013, 07:01:08 AM

Title: fmf 500 af headpipe springs
Post by: yeomans 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?

Title: Re: fmf 500 af headpipe springs
Post by: alward25 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.

Title: Re: fmf 500 af headpipe springs
Post by: yeomans 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.

Title: Re: fmf 500 af headpipe springs
Post by: brooksie 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.

Title: Re: fmf 500 af headpipe springs
Post by: hulkteam476 on April 03, 2013, 10:59:06 PM

Kawa 500 original springs (pict), or and (mix) cr 500

Title: Re: fmf 500 af headpipe springs
Post by: yeomans 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.

Title: Re: fmf 500 af headpipe springs
Post by: brooksie 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.

Title: Re: fmf 500 af headpipe springs
Post by: yeomans 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.

Title: Re: fmf 500 af headpipe springs
Post by: 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.

Title: Re: fmf 500 af headpipe springs
Post by: yeomans 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