Probably belongs in race shop but...

RCB33
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RCB33
Alright so I know this is probably more geared toward the race shop side of things but I need some product advice. First off, what brand wheel bearings do you all suggest. Secondly, I'm riding a 2003 YZ125 with a FMF gold series header but stock silencer. Any recommendations or suggestions on what you would put on it would be appreciated, thank you.
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EEE299
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EEE299 6/20/2016 12:02pm
6/20/2016 12:02pm
If you're looking for name brand bearings, I suggest Pivot Works as they have replacement warranty. They are more expensive and takes some time to get replacements but its worth it in my opinion. A lot of people just go to bearing shops however and get bearings cheap. I haven't done this because I have always wondered what to do about new dust seals.

For exhaust, fmf shorty is normally a go-to with their pipe.
RCB33
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RCB33 6/20/2016 12:12pm
6/20/2016 12:12pm
RCB33 wrote:
Alright so I know this is probably more geared toward the race shop side of things but I need some product advice. First off, what brand...
Alright so I know this is probably more geared toward the race shop side of things but I need some product advice. First off, what brand wheel bearings do you all suggest. Secondly, I'm riding a 2003 YZ125 with a FMF gold series header but stock silencer. Any recommendations or suggestions on what you would put on it would be appreciated, thank you.
Alright thanks,i was considering pivot works or all balls so thanks for the info!
dumpster_diver 6/20/2016 12:25pm
6/20/2016 12:25pm
Put your balls in a vice before you spend any $ on all balls
Falcon
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Falcon 6/20/2016 12:48pm
6/20/2016 12:48pm
Here's what I did on my '03 YZ125:

FMF Fatty pipe & shorty silencer.
V-Force 2
Leaner clip position on the needle, but a richer main jet (one size). I had to fiddle with the air screw too, but I don't remember which direction it went. Probably inward (richer).


I had a real love/hate relationship with the transmission on that bike. I never liked 5 speeds on a 125. I think I ended up sticking with the stock gearing and shifted a lot.

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EEE299
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EEE299 6/20/2016 12:52pm
6/20/2016 12:52pm
Falcon wrote:
Here's what I did on my '03 YZ125: FMF Fatty pipe & shorty silencer. V-Force 2 Leaner clip position on the needle, but a richer main...
Here's what I did on my '03 YZ125:

FMF Fatty pipe & shorty silencer.
V-Force 2
Leaner clip position on the needle, but a richer main jet (one size). I had to fiddle with the air screw too, but I don't remember which direction it went. Probably inward (richer).


I had a real love/hate relationship with the transmission on that bike. I never liked 5 speeds on a 125. I think I ended up sticking with the stock gearing and shifted a lot.
Been thinking bout doing that exact setup on my 250 but I'm not sure how much of a difference it will make honestly.

I hate 5 speed 125s.
mattbmx63
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mattbmx63 6/20/2016 12:53pm
6/20/2016 12:53pm
Oem bearings first, pivot works second. Never use all balls, like the previous poster said your better off putting your balls in a vice. Bearings are cheap, buy quality.
IceMan446
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IceMan446 6/20/2016 1:00pm
6/20/2016 1:00pm
OE bearings. Always.

Go with the FMF shorty silencer, VForce, one richer on the main and you should be good.

When you change your top end, get a weisco Suzuki ring for the same year. File it to fit the smallest ring end gap Yamaha recommends.

49 tooth rear.

One of the best things I did on my 04 was put new clutch springs in. I wasn't a big clutch abuser but it helped with the engagement and better feel.
Insider347
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Insider347 6/20/2016 1:46pm
6/20/2016 1:46pm
V force reeds.
Pro circuit pipe and shorty silencer (can cut the stock down)
I never got comfortable with the 5 speed but I guess enough seat time and you will make it work.
RCB33
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RCB33 6/20/2016 2:01pm
6/20/2016 2:01pm
Are the reeds and all new header,as well as others really THAT important, my budget right now is shoestring at best.
peelout
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peelout 6/20/2016 2:06pm
6/20/2016 2:06pm
up one tooth in the rear, bro

also make sure you torque your sprocket bolts regularly
EEE299
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EEE299 6/20/2016 2:09pm
6/20/2016 2:09pm
You'll notice a bigger difference if you get the silencer and reeds at once. It means you only have to jet once too. Instead of getting the reeds later then jetting again even though it should only be minor adjustments.

But no IMO you can do as little or as much as you want. Just make sure you jet it for whatever you have on.

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