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-   -   12 T front sprocket (https://www.kawasakiforums.com/forum/klx-250s-71/12-t-front-sprocket-10560/)

kawiridr04 03-21-2007 06:13 PM

12 T front sprocket
 
i was thinkin i could go with a 12 tooth sprocket off a klx 300 instead of gettin a 48 tooth rear and it would be the same thing but with less cost. i was also wondering if i would need a different chain. i dont think i do but just askin. would this be an ok setup compared to goin with the 48 rear sprocket

deej 03-21-2007 06:24 PM

RE: 12 T front sprocket
 
Don't do it, we are already pushing the wear and noise factor, even though some don't believe it, that's gonna be real hard on chain wear. Do the larger back sprocket.:eek:

kawiridr04 03-21-2007 06:27 PM

RE: 12 T front sprocket
 
http://www.rockymountainmc.com/produ...dFamilyId=9547


i dunno if this link will work, i've never done this but will these hand guards fit our bike? is our bar a 7/8"

03-21-2007 06:40 PM

RE: 12 T front sprocket
 

ORIGINAL: kawiridr04

i was thinkin i could go with a 12 tooth sprocket off a klx 300 instead of gettin a 48 tooth rear and it would be the same thing but with less cost. i was also wondering if i would need a different chain. i dont think i do but just askin. would this be an ok setup compared to goin with the 48 rear sprocket
well, not surisingly i am going to dissentfrom popular opinion. I say go ahead and do it as that's a clever way of lowering gearing and for a fraction of the cost of a new chain and rear sprocket. Look at it this way- if it does wear the chain quicker which i don't necessarily believe that it will as no one has solid evidence supporting this, you'll have to eventually replace it. But why waste a perfectly good oem chain now and invest say, $120 in a new chain and rear sprocket? Buy the $12 sprocket and use it until you have to replace the chain. IMO it's not a smart move to waste the oem chain when you can use it and save money currentlyusinga cheaper frontsprocket. The oem chain isn't all that bad. When I use to MX I used one chain for a year- the oem kawasaki one. Sure they'll stretch but highly likely they'll break. And as far as noise, I use a 13-tooth and I've stuck my head down there and hear no abnormal noises. Just sounds like a sprocket going around with a chain on it. It's your money though, you spend it the way you wish.

kawiridr04 03-21-2007 06:49 PM

RE: 12 T front sprocket
 
so the klx 300 front sprocket is the one to buy to fit. also how much of a difference could you tell when you went to the 13T iowaguy?

kawiridr04 03-21-2007 06:59 PM

RE: 12 T front sprocket
 
okay, i've decided to try this. { all these choices are driving me crazy![:@]} i am gettin a kenda rear tire 110/100/18, a uni air filter, a 12 tooth front sprocket, and some tusk handguards all for $110. now i just need some help from you guys and let me know if the air filter, handuards, and sprocket will fit if they are all for a klx 300. the handguards fit a 7/8" bar. and i ordered the filter and sprocket for the klx 300. from rocky mountain m/c. now if all this fits then everything will be good. please reply.

Kawi Wawi 03-21-2007 07:16 PM

RE: 12 T front sprocket
 
Handguards are pretty much universal... Normal bars are all 7/8".
Most brands usually need a little convincing when installing them (i.e. possible bending)...

I think the 12 tooth front sprocket is a bad idea, and probably won't fit without some sort of spacer...
If you do make it fit with a spacer, it's going to be noisy and wear the chain out quickly.
You'll also probably have to shorten the chain, but not sure about that. (You can grind off two links with a hand grinder, a bench vise, and a steady hand).


JB1 03-21-2007 07:16 PM

RE: 12 T front sprocket
 
You also need to order the filter oil....they come dry ;)
http://www.rockymountainmc.com/produ...dFamilyId=6789



deej 03-21-2007 07:25 PM

RE: 12 T front sprocket
 

ORIGINAL: Iowaguy


ORIGINAL: kawiridr04

i was thinkin i could go with a 12 tooth sprocket off a klx 300 instead of gettin a 48 tooth rear and it would be the same thing but with less cost. i was also wondering if i would need a different chain. i dont think i do but just askin. would this be an ok setup compared to goin with the 48 rear sprocket
well, not surisingly i am going to dissentfrom popular opinion. I say go ahead and do it as that's a clever way of lowering gearing and for a fraction of the cost of a new chain and rear sprocket. Look at it this way- if it does wear the chain quicker which i don't necessarily believe that it will as no one has solid evidence supporting this, you'll have to eventually replace it. But why waste a perfectly good oem chain now and invest say, $120 in a new chain and rear sprocket? Buy the $12 sprocket and use it until you have to replace the chain. IMO it's not a smart move to waste the oem chain when you can use it and save money currentlyusinga cheaper frontsprocket. The oem chain isn't all that bad. When I use to MX I used one chain for a year- the oem kawasaki one. Sure they'll stretch but highly likely they'll break. And as far as noise, I use a 13-tooth and I've stuck my head down there and hear no abnormal noises. Just sounds like a sprocket going around with a chain on it. It's your money though, you spend it the way you wish.
Good morning Iowa :D I think I have actually figured out why I think I hear what I call more noise since I changed the front sprocket from the OEM 14 tooth to a 13 tooth. The stock sprocket that came on our bikes has the rubber dampener built in which lets the chain ride on some of that rubber, which makes for a pretty quiet chain/sprocket noise. So maybe the noise I am hearing now is actually normal. Like I have said in the past I'm really a noob in all of this, learning as I go, and respecting all of the ideas and comments in here. So take what I always say with a grain of salt.;)

deej 03-21-2007 07:38 PM

RE: 12 T front sprocket
 
The 13 tooth did make a difference, seemed to drop all the gears down by half a gear (if that makes sense):D Then bumping the back up from the 42 to the 45 finished the change another half in the range, I love the setup now. I have thought of getting a 48 sprocket for the back and installing the OEM 14 tooth back on the front just because it has the dampener and the built in shoulder. I had to get a spacer made for mine, and I still don't like the fact that there are two parts in there when there could be one solid piece.

ol guy 03-21-2007 08:14 PM

RE: 12 T front sprocket
 
A 12 tooth will turn the chain pretty tight. Also it will make the chain run tighter on the deflectors that protect the swing arm. With extra wear and tear on all the parts in the long run i'll bet it's cheaper to go with the larger rear sprocket.

johnnyz62 03-21-2007 08:22 PM

RE: 12 T front sprocket
 
I just received a 48 tooth rear sprocket and 110 link chain from Rocky Mountain ATV. I went with Primary Drive brand components because they were out of Renthal 48t sprockets and o-ring 110 link chains. Also wasn't sure if I would like the gearing so the cheaper components made sense. Together they were a $75 shipped. Probably won't have time to get them installed until this weekend, but hopefully will work out ok.

03-22-2007 12:01 AM

RE: 12 T front sprocket
 

ORIGINAL: kawiridr04

so the klx 300 front sprocket is the one to buy to fit. also how much of a difference could you tell when you went to the 13T iowaguy?
NO!!! the KLX 300 front sprocket will NOT fit your 250. You want one for a Honda XR650L or a Ninja 250EX. trust me on this. do a search on this forum before you order any part if you are unsure if it will fit or not. denniskirk.com sells them and they are dirt cheap. you will not need a spacer if you order the right one. also, do not listen to all this rubbish of wear and tear on parts. if a chain is adjusted properly it is going to run on parts the same as if it's going around a 12,13,14,20 tooth front sprocket. only thing it could wear is the chain and that's better than buying a new one now and wasting your oem one. sure if a chain is too tight it will wear things out faster, but it's all about getting it adjusted. but if you want my honest opinion, i hate the looks of the rear sprocket and that's essentially why i upgraded the chain and rear sprocket over time- i wanted 13/45 and love renthal sprockets in the back. but that did cost me more. if you want an immediate feel in performance, i'd go with a 13 toother up front and wait a while and then upgrade to a longer 108 link chain and any 45-tooth rear sprocket. i paid $60 for my 108 linkparts unlimited x-ring chain from denniskirk.com and then I bought a steel, cheap 45-toother which i just sold and replaced with a renthal which i should have bought first. i wanted to save money, but i like the look of the renthal and just received it and put it on yesterday. like i said, it's your money. but a 13-toother will immediately increase your low end. and then you can use it later when you add a new chain eventually and a 45 tooth rear. good luck.

03-22-2007 12:06 AM

RE: 12 T front sprocket
 

ORIGINAL: deej


ORIGINAL: Iowaguy


ORIGINAL: kawiridr04

i was thinkin i could go with a 12 tooth sprocket off a klx 300 instead of gettin a 48 tooth rear and it would be the same thing but with less cost. i was also wondering if i would need a different chain. i dont think i do but just askin. would this be an ok setup compared to goin with the 48 rear sprocket
well, not surisingly i am going to dissentfrom popular opinion. I say go ahead and do it as that's a clever way of lowering gearing and for a fraction of the cost of a new chain and rear sprocket. Look at it this way- if it does wear the chain quicker which i don't necessarily believe that it will as no one has solid evidence supporting this, you'll have to eventually replace it. But why waste a perfectly good oem chain now and invest say, $120 in a new chain and rear sprocket? Buy the $12 sprocket and use it until you have to replace the chain. IMO it's not a smart move to waste the oem chain when you can use it and save money currentlyusinga cheaper frontsprocket. The oem chain isn't all that bad. When I use to MX I used one chain for a year- the oem kawasaki one. Sure they'll stretch but highly likely they'll break. And as far as noise, I use a 13-tooth and I've stuck my head down there and hear no abnormal noises. Just sounds like a sprocket going around with a chain on it. It's your money though, you spend it the way you wish.
Good morning Iowa :D I think I have actually figured out why I think I hear what I call more noise since I changed the front sprocket from the OEM 14 tooth to a 13 tooth. The stock sprocket that came on our bikes has the rubber dampener built in which lets the chain ride on some of that rubber, which makes for a pretty quiet chain/sprocket noise. So maybe the noise I am hearing now is actually normal. Like I have said in the past I'm really a noob in all of this, learning as I go, and respecting all of the ideas and comments in here. So take what I always say with a grain of salt.;)
hey deej-
good to hear from you. you know how i am, i talk out of my ass a lot and offer up my dissents and opinions. i mean well all the time though and actually post pretty experienced advice but it's not the gospel like i think.;)
i, like you, think the 13 tooth sprocket was the most noticeable mod performance-wise next to the pipe that i ever bolted onto my 250. it's a gem of a mod that people probably don't respect enough to actually swap out. it totally changes the way the bike makes power imo. you?
later buddy.

klxCouple 03-22-2007 12:47 AM

RE: 12 T front sprocket
 
I like these


[IMG]local://upfiles/2315/2B054D0C6BE4444D9F2B4950CF691F0D.jpg[/IMG]

onestarr99 03-22-2007 12:58 AM

RE: 12 T front sprocket
 
Iowaguy Is right the KLX 300 front sprocket wont fit!! This is what I put on.

AFAM sprocket
Part # 24502 13tooth 520 pitch
Phone # 1-800-290-9040
It says it is for a EX/KLR 250-650cc 1987-96 But it is a direct bolt on..I did not need a spacer! I didn't notice any more noise than the stock one. If you have your hart set on a 12 tooth than maybe you can use this info to get a 12t instead of 13t. Good luck and lets us know how you make out...:D:D

deej 03-22-2007 02:30 AM

RE: 12 T front sprocket
 
Hey Iowa, yea I really think the 13 tooth is the best mod for instant and inexpensive power. Hey speaking of the 13 tooth, do you have a brand, model # for a 13 tooth with the shoulder built in that fits our bike, I really want to get that spacer out of there. Its probably pretty rusty buy now, since it was machined.

kawiridr04 03-22-2007 03:35 AM

RE: 12 T front sprocket
 
so if the klx 300 front sprocket doesn't fit what about the rear if i wanted the 48 tooth

Richt 03-22-2007 03:42 AM

RE: 12 T front sprocket
 
I think S Dunne ran a 12 tooth when racing, look at the early 2006 posts under his name .

JB1 03-22-2007 03:43 AM

RE: 12 T front sprocket
 

ORIGINAL: deej

Hey Iowa, yea I really think the 13 tooth is the best mod for instant and inexpensive power. Hey speaking of the 13 tooth, do you have a brand, model # for a 13 tooth with the shoulder built in that fits our bike, I really want to get that spacer out of there. Its probably pretty rusty buy now, since it was machined.
You newbies really need to learn how to use the search...lmfao

https://www.kawasakiforums.com/m_32788/tm.htm

ORIGINAL: YYY.Guy
Anyway, here's the list of sprockets and part numbers that I've compiled:

JT Sprockets: JTF516-13
Sprocket Specialists: 514XK-13
Sunstar: 34113
Kimpex: 101006

The Kimpex has the shoulder built in, so no spacer is needed. Didn't notice any increase in chain noise, either. The only thing that would have made the whole experience better was if it was easier to loosen the dam nut to get the sprocket off!!! (Yes, I did unbend the retaining washer beforehand ... it was still a bitch to get off!)

Hope this helps!

Mike

deej 03-22-2007 03:52 AM

RE: 12 T front sprocket
 
Hey who you calling noob? I was the first one to post in this section, in fact I asked Patrick for the section way back when. Now I may be lazy, but I am no noob.:D:D:D Besides that section needs updated as people on here find other stuff.[8D]

deej 03-22-2007 03:53 AM

RE: 12 T front sprocket
 
Oh and I invented the Internet[8D]

JB1 03-22-2007 03:58 AM

RE: 12 T front sprocket
 

ORIGINAL: deej

Hey who you calling noob? I was the first one to post in this section, in fact I asked Patrick for the section way back when. Now I may be lazy, but I am no noob.:D:D:D Besides that section needs updated as people on here find other stuff.[8D]
You realize your not helping your case any [sm=icon_stickpoke.gif][sm=happy046.gif]

Thunderchild 03-22-2007 04:03 AM

RE: 12 T front sprocket
 
FWIW, I'm running the Daystar. Installed and works fine. No spacer needed.



deej 03-22-2007 04:26 AM

RE: 12 T front sprocket
 

ORIGINAL: JB1


ORIGINAL: deej

Hey who you calling noob? I was the first one to post in this section, in fact I asked Patrick for the section way back when. Now I may be lazy, but I am no noob.:D:D:D Besides that section needs updated as people on here find other stuff.[8D]
You realize your not helping your case any [sm=icon_stickpoke.gif][sm=happy046.gif]
Yea I know.......[sm=sigh.gif][sm=funnypostabove.gif]

Nobrakes 03-22-2007 04:44 AM

RE: 12 T front sprocket
 
Am I the only one who likes the stock 14:42 gearing? I honestly don't think I'd mind going 15:42 or maybe 14:39. The main thing I don't like about going up in the back or down in the front is that it makes the cruising RPMs higher and after a while that tends to wear me out a lot faster on the road. And I never had any problems with first gear being too fast off-road. I guess I'm just different. I reckon I've always been on the fringes of the bell curve, so this should be no different. :D

While the gearing ratios have no correspondance with the KLX, I got my 49 tooth rear for the KTM and that lets me use the stock chain with the 14 tooth front. My first gearing try was 13:52 and that was a little buzzy at highway speeds. Not bad, probably about like the KLX in 6th gear using stock 14:42. But I tested out 14:49 this evening and I think this gearing is superb. On the high end it would be equivalent to a 7th gear in the KLX, cruising at 60 MPH at around 5000 RPM, just rumbling along is great, I could do that all day and not get tired. Makes first a little high, but with the larger low-end torque, it still lugs along just fine in first so I don't think I'll have any problems going slow when I need to. I tested it a little off-road and it was fine.

Kawi Wawi 03-22-2007 06:05 AM

RE: 12 T front sprocket
 
I'm with you Brian. I wouldn't gear down for anything... Power up! Don't gear down!:D
Yeah, I still haven't got my big bore kit on yet... :( Real soon though.

03-22-2007 11:15 AM

RE: 12 T front sprocket
 
well, his ktm and our tiny klx's are two very different machines. if you would ride my 13/45 setup you'd switch immediately. It's got tons of low end grunt for a little 250. I think I'm gonna go to 331cc and I can just imagine the low end increase. It's going to be sweet. The klx, imo, needs to be geared down when stock since it has no power and going at least down one up front increases the torque spread to make it hit a lot earlier.

03-22-2007 11:28 AM

RE: 12 T front sprocket
 
here's the 13-tooth i have. i just checked and it has no wear whatsoever on it. i just got a new renthal 45 installed in the rear and sent my old one to marc in NY. man i love my chain and sprockets.:)

http://denniskirk.com/jsp/product_ca...p;mmyId=500205

markturbo 03-22-2007 02:45 PM

RE: 12 T front sprocket
 
I don't remember the brand name of mine, I just ordered a 13 tooth for the Honda 650L and it had the shoulder on it and fit perfect, no increased chain noise or wear.

If they had a 12 tooth I'd buy one just to try it out, even if you don't like it it's not a lot of money compared to a rear sprocket and new chain.

Nobrakes 03-22-2007 05:05 PM

RE: 12 T front sprocket
 


ORIGINAL: markturbo
... even if you don't like it it's not a lot of money compared to a rear sprocket and new chain.
Chains are expensive, but what rear sprockets are you getting? I just get a Primary Drive steel sprocket for $18 from Rocky Mountain ATV. It seems nice and thick and solid and good quality. It's heavy, but hey, it's steel and will last at least as long as the chain unlike aluminum which is lighter but more expensive and doesn't wear as good.

deej 03-22-2007 05:25 PM

RE: 12 T front sprocket
 

ORIGINAL: Nobrakes

Am I the only one who likes the stock 14:42 gearing? I honestly don't think I'd mind going 15:42 or maybe 14:39. The main thing I don't like about going up in the back or down in the front is that it makes the cruising RPMs higher and after a while that tends to wear me out a lot faster on the road. And I never had any problems with first gear being too fast off-road. I guess I'm just different. I reckon I've always been on the fringes of the bell curve, so this should be no different. :D

While the gearing ratios have no correspondance with the KLX, I got my 49 tooth rear for the KTM and that lets me use the stock chain with the 14 tooth front. My first gearing try was 13:52 and that was a little buzzy at highway speeds. Not bad, probably about like the KLX in 6th gear using stock 14:42. But I tested out 14:49 this evening and I think this gearing is superb. On the high end it would be equivalent to a 7th gear in the KLX, cruising at 60 MPH at around 5000 RPM, just rumbling along is great, I could do that all day and not get tired. Makes first a little high, but with the larger low-end torque, it still lugs along just fine in first so I don't think I'll have any problems going slow when I need to. I tested it a little off-road and it was fine.



Well actually it really comes down to rider preference. Take me for example, the longest I have to ride at highway or close to highway speeds is a couple of miles. What I really geared down for is so that no matter what trail or steep gravel hill I am riding on I know in my mind and through experience is that if and when I need the bike to haul me out of a low or steep spot its going to grunt and pull with out having to slip the clutch too much. I can't imaging going back to stock, let alone the other way that would yea let you do 80 down the highway, but you would be slipping the clutch all the time just to get it to hook up off road when you really needed it. So if you ride almost all highway and don't really care about low end power then keep the stock 14-42 or go to a 15-42, or a 14-40, I mean we can talk about what gears are the best, and I have done it on more than one occasion, but really it all boils down to a couple of things. How much do you weigh, and where do you want to go?


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