Carburettor replacement for 84 250r

[ivan-083]

Hey guys I need to replace my 84 250r carburettor it’s worn! Rebuilt it and all jetted properly and still doesn’t not running right! Even took it to my bike shop and they guy took it home and ran it for a week or so and said the same thing! What carburettor should I get? Any ideas? Will i need to change anything? Will the new carb still fit the air box etc? Thanks Ivan


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[sledcrazyinCT]

I have an 82 that previous owner installed an 86 flat slide carb

[ivan-083]

I have an 82 that previous owner installed an 86 flat slide carb

And it works fine? Is the 86 38mm? Thanks


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[sledcrazyinCT]

Carb on my engine is 34mm Chances are you would need an aftermarket intake ti fit a 38mm carb

[sledcrazyinCT]

https://www.ebay.com/itm/1986-1987-HONDA-TRX250R-ATC250R-ENGINE-CARBURETOR-CARB-TRX-250R-19227/232680113874?hash=item362cd0c6d2:g:TqMAAOSwnWhakKd Q

This seller offers lots of carbs. I picked up many from him just like this one

[ivan-083]

https://www.ebay.com/itm/1986-1987-HONDA-TRX250R-ATC250R-ENGINE-CARBURETOR-CARB-TRX-250R-19227/232680113874?hash=item362cd0c6d2:g:TqMAAOSwnWhakKd Q

This seller offers lots of carbs. I picked up many from him just like this one

Have you got the item number on eBay! Can’t find it!


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[Tri-Z 250]

http://www.carbparts.com/
This is 1 of two Distributors in the USA, he's local to me. I've bought 8 carbs off them over the years. Jeff's a good guy, but certain models have taken a bit of time to receive from MFG. Make no mistake I always get what I ORDER it just took an extend amount of time on 1 order. Not his fault but if your a gotta have it tomorrow guy, go eBay. These are NEW pre jetted to a stock setting, you can get extra jet upon order if needed.

[shortline10]

This is the perfect replacement for the air cooled model . Bolt on adjust the idle and good to go .
https://www.ebay.com/itm/Keihin-PJ-P-J-34mm-34-Carb-Carburetor-Honda-TRX250R-ATC250R-CR250-CR500-YZ250/201306690603?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649&redirect=mobile

[sledcrazyinCT]

Have you got the item number on eBay! Can’t find it! 232680113874

[ivan-083]

232680113874

Thanks sled! I’ve brought a tonne of parts from this guy too and he is pretty cheap but it just sold! Ahhh


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[ivan-083]

This is the perfect replacement for the air cooled model . Bolt on adjust the idle and good to go .
https://www.ebay.com/itm/Keihin-PJ-P-J-34mm-34-Carb-Carburetor-Honda-TRX250R-ATC250R-CR250-CR500-YZ250/201306690603?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649&redirect=mobile

Short line this will bolt straight and and be ok with the airbox on the 84? Thanks for the advice


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[350for350]

Whatever you do, don't buy one of the cheap, Chinese ones on Ebay. As much work as you've put into this, you don't want the issues that you'll probably have with one of those.

[ivan-083]

Whatever you do, don't buy one of the cheap, Chinese ones on Ebay. As much work as you've put into this, you don't want the issues that you'll probably have with one of those.

Won’t be buying Chinese crap I can tell you that! You get what you pay for!


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[russellw971]

The PJ off the 1986 ATC250R is an excellent choice. I have owned alot of bikes with the PJ series carbs . If you have a pipe , reeds, and porting the 36mm off of the CR125 works very well also. In my opinion a 38mm hurts a trail ridden or even mildly track ridden 250cc ATC or quad but excellent choice for all out dune or drag use. Off the top of my head the pilot was 42, main 145 , mid clip position for the 34mm PJ I put on my 1982 air cooled 250r. Everything is stock on it.

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[russellw971]

I have seen good results with the Chinese knock off PJ if the Kehin jets and needle are used but I refuse to use them just by principal.

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[sledcrazyinCT]

Thanks sled! I’ve brought a tonne of parts from this guy too and he is pretty cheap but it just sold! Ahhh

I know that auction only had a couple hours left when I found the item number. Not sure how quickly you want to get your trike running again, but he will undoubtedly offer another one of these carbs. I bought one carb from him in auction and only paid $18.50 + freight.

I bought 3 of these carbs from him just for spare parts. The choke plungers are discontinued and if you can even find them those cost more than buying a complete carb

[sledcrazyinCT]

Did you find a carb yet?

[ivan-083]

Did you find a carb yet?

Go my bike shop here In Perth order me a new one from south Australia!


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[ivan-083]

Did you find a carb yet?

Bike shop said they couldn’t get one typical excuse! There is a 33 and a 34mm the ones you showed me on eBay! I did email the seller and he said the 33 is easier to tune and a better carb?
What you guys think? Which would you buy out of the 2?
https://uploads.tapatalk-cdn.com/20180409/6b40402c49cd3aafe967df39849775db.jpghttps://uploads.tapatalk-cdn.com/20180409/3c2aac50c95fcd8c427900ec73f61781.jpg



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[sledcrazyinCT]

Hopefully others will add their opinion. If you are concerned about the original carb boot I would suggest the 33mm carb as it will fit easier.

[ivan-083]

Hopefully others will add their opinion. If you are concerned about the original carb boot I would suggest the 33mm carb as it will fit easier.

Would it still join up to the original air box?


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[russellw971]

The 34pj was stock on the 86 atc 250r. I like the idle adjustment on the PJ better .

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[ivan-083]

The 34pj was stock on the 86 atc 250r. I like the idle adjustment on the PJ better .

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Thanks, have you got a second gen?


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[ivan-083]

Thanks, have you got a second gen?


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With the pj or pwk can you use the stock throttle cable or do you need to replace it


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[russellw971]

I have a 1982 that is completely stock other than tires and wheels that I ride.

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[russellw971]

I am not positive on this but when I put the PJ on my 84 model I got the thumb throttle , cable , and carb as a package. I bought it off of eBay several years ago. I think you may need the thumb throttle from the PJ equipped ATC or quads . I don't think the older 3 wheeler throttles had enough travel to get the slide wide open on the PJ carbs. But it's been so long I can't remember if it was a 34 mm or a 36 mm from a cr125 that I used on it. The other 2nd gen I put one on was in 1987 or so and it was all stock from an 86 that a friend swapped to a 38mm and twist throttle.

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[russellw971]

I live in a climate that has temp swings - especially this time of year. The PJ idle adjustment is made by turning the choke knob. It was a gas adjustment not an air adjustment plus doesn't require a screwdriver so you can fine tune your idle on the trail as well as richen the pilot circuit very easily.

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[ivan-083]

I live in a climate that has temp swings - especially this time of year. The PJ idle adjustment is made by turning the choke knob. It was a gas adjustment not an air adjustment plus doesn't require a screwdriver so you can fine tune your idle on the trail as well as richen the pilot circuit very easily.

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Ok thanks for the advice, appreciate it!


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[ivan-083]

I live in a climate that has temp swings - especially this time of year. The PJ idle adjustment is made by turning the choke knob. It was a gas adjustment not an air adjustment plus doesn't require a screwdriver so you can fine tune your idle on the trail as well as richen the pilot circuit very easily.

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What’s the real main difference between the pj and the pwk?


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[russellw971]

Slide shape and the enricher - ( choke ) . I have a 1989 cr 500 with a pwk on it. It seems to rev quicker when in neutral. I can't tell any difference riding it. I have the stock pj carb cleaned and ready to put back on it when the pwk gives me trouble. I miss the ability to turn the enricher to speed up the idle when it's cold and slow it down when warmed and ready to ride. The pwk was supposed to have quicker throttle response but honestly I can't tell a difference in real life. Someone else may be able to. I have a stock pull off 34 mm pj ready to go for when the stock round slide on my first gen gives trouble. I don't ride dunes or drag race it . I use it on trails . It's the only ATC that I have that isn't a garage queen. I am in the planning stages of converting a 2001 yz 250 to a trike and at that point I will most likely retire the first gen and restore it.

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[russellw971]

I also have a rough 1981 model that's missing the top end from the motor . The cases are cracked where the cylinder mounted and one stud is pulled out. I plan to put an old cr 480 cylinder and head on it just to see if it can be done. I have my doubts that it will ever fully fill the cylinder and make use of the huge bore ... I am getting off subject. Sorry.

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