2004 CR125 broken carb slide

motofab36 wrote:

I[img]https://p.vitalmx.com/photos/forums/2020/03/11/409858/s1200_20200310_173823.jpg[/img] I had a kid bring me this cr125 to work on that was idling high and running irratic. I checked for air leaks, adjusted the...

I
I had a kid bring me this cr125 to work on that was idling high and running irratic. I checked for air leaks, adjusted the air screw, all tge regular stuff. Then i pulled the slide out and found the rear side is broken off, kinda looks like it has been eatin away. Have any of you seen this before?

motofab36 wrote:

The oem slide and also a complete carb is discontinued. Looks like a Lectron may be in order. Unless any of youns know where I can...

The oem slide and also a complete carb is discontinued. Looks like a Lectron may be in order. Unless any of youns know where I can get a slide or carb. I didnt see much on ebay

digger wrote:

How did you like the way the bike ran before the slide broke ? You have a few options for a new slide. Yamaha still offers...

How did you like the way the bike ran before the slide broke ? You have a few options for a new slide. Yamaha still offers a 4.25 slide that is a direct drop in. It will be ever so slightly richer than the 4.5 that you have now, but it’s a little pricey. https://www.partzilla.com/product/yamaha/1C3-14112-42-00?ref=1f5a4d0c5d…

Honda offer a 4.0 slide that is a little still than the Yamaha 4.25, but again is a direct drop in. With either of the 4.25 and 4.0 slides you also have the ability to cut them leaner into a 4.5 or leaner.
https://www.partzilla.com/product/honda/16022-KSR-734?ref=a2dd5c8e0915e…

JD jetting offers a 5.0 slide that will be leaner than the 4.5 slide, but will need the port fill to work with the TPS. I fill the port with paper and finish the top 1/2 inch or so off with JB Weld.

savvy wrote:

Nice info mate, which out of them would you go for? Which is better leaner or richer?

digger wrote:

How did you like the way the bike ran before the slide broke ? You have a few options for a new slide. Yamaha still offers...

How did you like the way the bike ran before the slide broke ? You have a few options for a new slide. Yamaha still offers a 4.25 slide that is a direct drop in. It will be ever so slightly richer than the 4.5 that you have now, but it’s a little pricey. https://www.partzilla.com/product/yamaha/1C3-14112-42-00?ref=1f5a4d0c5d…

Honda offer a 4.0 slide that is a little still than the Yamaha 4.25, but again is a direct drop in. With either of the 4.25 and 4.0 slides you also have the ability to cut them leaner into a 4.5 or leaner.
https://www.partzilla.com/product/honda/16022-KSR-734?ref=a2dd5c8e0915e…

JD jetting offers a 5.0 slide that will be leaner than the 4.5 slide, but will need the port fill to work with the TPS. I fill the port with paper and finish the top 1/2 inch or so off with JB Weld.

savvy wrote:

Nice info mate, which out of them would you go for? Which is better leaner or richer?

digger wrote:

What bike will you be using it in ?

From rich to lean, it would be ---4.0, 4.25, 4.5, 5.0, 5.5, 5.75.....

savvy wrote:

Nice info mate, which out of them would you go for? Which is better leaner or richer?

digger wrote:

What bike will you be using it in ?

From rich to lean, it would be ---4.0, 4.25, 4.5, 5.0, 5.5, 5.75.....

savvy wrote:

Hi, it's for a Cr125 04. Which slide would be best you think?

digger wrote:

What bike will you be using it in ?

From rich to lean, it would be ---4.0, 4.25, 4.5, 5.0, 5.5, 5.75.....

savvy wrote:

Hi, it's for a Cr125 04. Which slide would be best you think?

profeshenal125 wrote:

According to Diggers post, a 4.25 would be the closest. A 4.75 would be ideal, since the bike runs rich, but no one makes it. A...

According to Diggers post, a 4.25 would be the closest. A 4.75 would be ideal, since the bike runs rich, but no one makes it. A 5.0 would be a great choice also, but the epoxy fill in, is a no go. I hv 3 richer needles, now I need leaner needles with a richer slide, I believe. Not saying this is perfect, I changed to a 37.5 pilot, air screw 2 turns out, new stock needle in the middle, 380 main. Pump Gas is from seller yet, could be mixed wrong. I polished the carb, checked reeds, there boyseen pro series. Install a new coil and iKat, very quick throttle response, couldn’t ride it. Buisness owners get pissed. A 380 main is for a decked, ported engine, like my 1st 04 . This engine could be ported also, no time to break it down, pipe side on cylinder it has hrc or hro, faded . My other 04 didn’t hv that. Runs stronger that my other 04, when it was stock.

savvy wrote:

Hi, it's for a Cr125 04. Which slide would be best you think?

profeshenal125 wrote:

According to Diggers post, a 4.25 would be the closest. A 4.75 would be ideal, since the bike runs rich, but no one makes it. A...

According to Diggers post, a 4.25 would be the closest. A 4.75 would be ideal, since the bike runs rich, but no one makes it. A 5.0 would be a great choice also, but the epoxy fill in, is a no go. I hv 3 richer needles, now I need leaner needles with a richer slide, I believe. Not saying this is perfect, I changed to a 37.5 pilot, air screw 2 turns out, new stock needle in the middle, 380 main. Pump Gas is from seller yet, could be mixed wrong. I polished the carb, checked reeds, there boyseen pro series. Install a new coil and iKat, very quick throttle response, couldn’t ride it. Buisness owners get pissed. A 380 main is for a decked, ported engine, like my 1st 04 . This engine could be ported also, no time to break it down, pipe side on cylinder it has hrc or hro, faded . My other 04 didn’t hv that. Runs stronger that my other 04, when it was stock.

savvy wrote:

Thanks for reply mate, I'm having trouble with my 125. Engine has no leaks, sealed crank half's and put seals in with new bushing. Holds leak...

Thanks for reply mate, I'm having trouble with my 125. Engine has no leaks, sealed crank half's and put seals in with new bushing. Holds leak test all day long. It really smokes and oil is in pipe, got to be fuel related but can't work it out, its never done this before.