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New sprockets / chain for KLX250
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Fast Lane Racing
 
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New sprockets / chain for KLX250 - November 12, 2014, 01:41 PM

It's been a while since I was really into the MX and dirt biking etc (15 years)

I need to replace my sprockets and chain. I'm really hard on the bike and looking for something strong. I've busted a few teeth off my rear.

What's the quality brands now days? What are the guys that run Taskers / hare scrambles, etc using?
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Re: New sprockets / chain for KLX250
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Re: New sprockets / chain for KLX250 - November 12, 2014, 02:12 PM

I use jt sprockets, cheap but strong. I generally use rk or renthal chains, not cheap but worth it.
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November 12, 2014, 02:36 PM

DID chain always. Renthal twin ring rear and dirt tricks front.


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November 12, 2014, 03:12 PM

I just went with a steel front and rear sprocket and made sure to get an o or x ring chain. It's lasted all season racing my KX 450 and I never noticed the added rotational weight. I had an aluminum renthal rear, but I bent that at taskers so I don't play that game anymore. I had good luck with the primary drive x ring chain I got from Rocky Mountain ATV (I believe it is their house brand).


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November 12, 2014, 03:44 PM

+1 for what Thomas said. I have spare rims, so paying $80 for 2 rear sprockets, + a front, + a chain....just seemed stupid. I went to the steel ones and have been happy and no problems. The rear was like $20 or so.

Steel front and rear. Less bling, lasts longer.


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November 13, 2014, 08:24 PM

Cool thanks guys. I gotta get this thing running again... Going through withdrawal not having a running bike...
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November 14, 2014, 07:15 AM

Ebay, Primary Drive chain and sprocket kit and be done with it. Will cost you about $80 for everything.
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November 14, 2014, 09:32 AM

One thing about the ebay chains (Volar for example) is getting replacement links is a nightmare and its not easy trying to match up a common or mainstream link to one of theirs. So they can be cheap to own or buy but if you need to cut the chain or make a mistake with the link they provide it gets much more expensive.

My vote: Aluminum sprocket, steel teeth (supersprox) rear, lightweight front steel sprocket and a good chain. The gains are probably negligible but its there every time you crack on the throttle, if the cumulative effects throughout a scramble or race is even a couple or a few bike lengths that can be the difference between having someone stuff you or you shutting the door on someone else.


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November 14, 2014, 09:42 AM

The Primary Drive stuff can also be found at Rocky Mountain ATV so no issues with their stuff if you buy off of ebay (usually cheaper) in finding replacement master links and such.
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November 14, 2014, 10:08 AM

Quote:
Originally Posted by shiphteey View Post
My vote: Aluminum sprocket, steel teeth (supersprox) rear, lightweight front steel sprocket and a good chain. The gains are probably negligible but its there every time you crack on the throttle, if the cumulative effects throughout a scramble or race is even a couple or a few bike lengths that can be the difference between having someone stuff you or you shutting the door on someone else.
I don't know. Considering that the tube alone weighs something like 4 lbs, the tire is something like 8 lbs, then you've got the rest of the wheel assembly I don't think an AL sprocket is going to make much difference. We're also talking about a klx250, not a lightweight race bike (note that I'm a klx fan).
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November 15, 2014, 08:54 AM

I'm no expert, but I use whatever name brand sprockets are on sale. Think I have Renthal on the 400 now. I did spring for the DID chain. Same one on the race bike. That way I always have a spare chain and master links for both.


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November 15, 2014, 09:09 AM

I've been using Renthal chains and aluminum sprockets exclusively for the past 10 years or so and I'm happy. The aluminum does wear fast, and if that's a concern they make the Twin Ring that's steel teeth with an aluminum hub.

But on a MX bike I usually only care about weight and don't mind having to replace stuff a little more often.
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November 15, 2014, 09:28 AM

Quote:
Originally Posted by KirkRoy View Post
I don't know. Considering that the tube alone weighs something like 4 lbs, the tire is something like 8 lbs, then you've got the rest of the wheel assembly I don't think an AL sprocket is going to make much difference. We're also talking about a klx250, not a lightweight race bike (note that I'm a klx fan).
Inches add up to feet. Feet add up to yards.


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ZX14: 222 mph
ZX12: 229.6 mph
ZX10: 202.8 mph

ZX9: 177.6 mph
ZX6R: 180.8 mph
EX650: 130.7 mph

EX300: 114.7 mph
EX250: 122.4 mph
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250 cc's of awesomeness
 
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November 15, 2014, 09:33 AM

Quote:
Originally Posted by shiphteey View Post
Inches add up to feet. Feet add up to yards.
Yeah you'd be surprised how much it all adds up. Since I have a 50 hp bike I don't care that much. But the competitive guys riding 125's and super minis really count ounces on the drive system. It makes a difference when you ride lower powered bikes.
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November 17, 2014, 12:52 AM

At the skill level of most people here... Aluminum isn't going to make a bit of difference.

You're better off spending the money on a riding course like corner spin or corner speed.


Then again... That's just me.

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