84 replies to this topic

[SheWolf TT Gold Member]

I haven't snagged a SpeedoDRD yet, it's on the list of farkles.  I've been using a GPS for some rides, and I know where my speed is after matching it with the GPS.  I'm a little closer as it is due to the bigger tires I'm running too.  I didn't care for the stockers, they lasted 50 miles before I ripped them off of there and put on some real skins.

[DocM TT Newbie]

I also mainly ride dirt, so I changed to the D606's, front and rear, right after I bought the bike. The 12 Oclock labs speed corrector was easy to install (plug & play), and it tucked nicely under the seat. It was easy to program, instructions were clearly written, and it had some nice additional features. I needed an accurate speedo when on the pavement, the bike draws enough attention as is, because it looks like a (non-street-legal) dirt bike.

[j_schuetz TT Newbie]

Like I said before I am totally new to this. I was looking at front sprockets and was wondering what the 520 countershaft means? Is there a brand of sprocket that people prefer better?

[DocM TT Newbie]

The countershaft sprocket refers to the drive sprocket on the engine. In your case with the WR250R, the size of the countershaft sprocket is a 520 size and matches the 520 chain and rear sprocket. There are different sizes of sprockets and chains, and they are usually selected based on the size of the engine and horsepower and torque output. If you select a 12 tooth, 520 size, countershaft sprocket for your WR250R, that would be the least expensive way to gear your bike down, while keeping your original chain. The bend radius is tighter at the countershaft sprocket, but if your chain is in good shape and well lubricated, it will work fine. I use a 45 tooth rear sprocket and the stock 13 tooth countershaft sprocket with good results, but I also have a 12 tooth countershaft sprocket that gives me lower gearing when I need it.

[j_schuetz TT Newbie]

Thanks for the info. But I have a 250x. I assume it will have the same effect. All I am looking to get is a little more low end torque. I can lose a little top end which I know will happen if I gear down. I can't find a straight away to even see what my top end is now. The fastest I have gone as per my speedo is 92 mph. But I usually drive hwy speeds 55+.

[DocM TT Newbie]

If I were gearing down for the WR250X, I would increase the rear sprocket size, up 3-4 teeth and leave the stock 13 tooth front countershaft sprocket as is. This option will cost you more, but I think you will have less vibration and noise this way. With my 13 front and 45 rear combination my true pavement max speed is 81 mph, on my WR250R.

[black beauty TT Newbie]

Will this fit on my WR 250R? Its cheap enough. 11 bucks plus shipping. if you guys tell me it will fit, im ordering it.   Im going with the 12/45 for trail riding and 13/45 for road.

http://cgi.ebay.com/...sQ5fAccessories

[daveb-1961 TT Newbie]

If you're mainly off rode, try the 12/50 combo and add a trials tire on the back -- it really wakes-up the bike.  You can still do 60 MPH for short distances (15 minutes with no stress).

[billygildark TT Newbie]

has anyone ever messed with the "dyno boost" chip from magnum preformance? wr250x

[BWA TT Newbie]

12/44 here on a wr250x (stock chain).  I think it's pretty close to perfect middle ground between streetability/off road.  Speedo is about 20% off (GPS).

[O-zone TT Member]

WR250R Supersprox???

Question: I want to pick up a little grunt in the lower end. My WR has great mid and top end, but lack's the snap down low. Will a High Performance sprocket like a Supersprox with the aluminum core and steel teeth increase my low end with out adding teeth to the back sprocket (because it's so light weight)?

I dont want to go with a 12T front because I hear it's bad on your chain life...

Your thought's, anyone...?

My front is 13T and the back is 43T

[YZEtc TT Titanium Member]

O-zone said:

Question: I want to pick up a little grunt in the lower end. My WR has great mid and top end, but lack's the snap down low. Will a High Performance sprocket like a Supersprox with the aluminum core and steel teeth increase my low end with out adding teeth to the back sprocket (because it's so light weight)?

Not too likely you'll feel anything like more low-end grunt by merely changing to a lighter-weight sprocket.

O-zone said:

I dont want to go with a 12T front because I hear it's bad on your chain life...

Your thought's, anyone...?

My front is 13T and the back is 43T

I've been reading that all my riding life, and, honestly, I never saw any kind of difference with chain wear with a 12-tooth front sprocket.
My chains and sprockets still seemed to last just as long as if the bike had a 13 or 14-tooth front sprocket, and I believe what kind of terrain and maintenance they recieve is a mucho bigger factor.

Your WR-250R is simply geared too high for trail riding with the stock sprockets, and Yamaha Motor Co. knows that.
It came with those sprockets in order to satisfy some regulation, not because it's the hot setup.
Same as why it comes with lean FI settings and a plugged-up muffler with a cat. converter inside of it.

On my WR-250R, I used 12/47 sprockets, and it felt great.
Yeah, the engine will turn more revs while cruising on the street, but the bike is a 250cc dual-purpose rever, not an 1,800cc Gold Wing that idles down the highway all day.
That's my opinion, anyway.  

[O-zone TT Member]

Thank you,   Nice to know I can drop to a 12T if I need to. The bike shop guy just shook his head when I brought up the 12T:)  

With your thought's in mind. I think I will start with the 47 in the back and then the 12T in front, if the 47's  not enough.

Guessing I will need to add a new chain to that list:)  Thinking 110 link?

Starting from square one:)

[YZEtc TT Titanium Member]

Yeah, you'll need a longer chain.

Tell the bike shop guy to go ride his Gold Wing.  

[BWA TT Newbie]

12T/44T here with the stock chain, over 1500 miles on it with the new sprockets, looks brand new (I am pretty good about chain maintenance though).

[O-zone TT Member]

BWA:  What kind of top end speed do you end up with, with  that set up?

How's your low end grunt?

I'm pretty new with adjustments like this, so forgive all the silly questions...

Sure love this forum:)

Edited by O-zone, 07 November 2010 - 09:53 PM.
Correction...

[BWA TT Newbie]

O-zone said:

BWA:  What kind of top end speed do you end up with, with  that set up?

How's your low end grunt?

Last few times I had my GPS with me I've topped out around 85-87MPH.

Low end grunt is significantly better.  Wheel comes up on throttle alone in 1st and 2nd. Much better in the loose stuff too.

Quote

I'm pretty new with adjustments like this, so forgive all the silly questions...

Sure love this forum:)

Nothing to forgive, that's what forums are for. Ask away

[raven1 TT Newbie]

Hi all, just added a Supersprox rear 48 teeth, kept the front stock 13 teeth, used a new RK Gold X-ring 112 link and the difference is awesome!!!
I use my WR250R for off road only, before the change would only use 1st & 2nd gears, sometimes 3rd.  
Now I am using 1st to 5th, climbs up steep hills with total control, and same for downhill.
Forget about 1 or 2 more horsepower here or there, this is the best mod to wake up the WR250R and make it extremely user friendly off road.

[elfraz TT Newbie]

So it looks like the 12/44 set up will work with stock length chain, is this correct? I am setting my wr250x with dirt wheels and want to be able to switch to the stock wheel for street riding. I just want to make sure there are no issues with chain length.

[DragonNester TT Bronze Member]

 elfraz, on 03 May 2011 - 09:06 AM, said:

So it looks like the 12/44 set up will work with stock length chain, is this correct? I am setting my wr250x with dirt wheels and want to be able to switch to the stock wheel for street riding. I just want to make sure there are no issues with chain length.

Yes, it will work with the oem chain.  I have a 12/45 set up and the oem chain works for that, also.  I guess I should add mine is a WR250R...I'm assuming the swing arm length and chain length (108 links) are the same on the X model.as the R.

Edited by DragonNester, 20 February 2012 - 04:56 AM.