TRX300 Carb Rebuild - Page 3 - Honda ATV Forum
Honda FourTrax Discussions for the FourTrax Rincon, Foreman, Rancher, Recon

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post #21 of 37 (permalink) Old 03-19-2018, 03:40 PM
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Ouch! Still quite expensive. I just looked on PSN at used OEM, around $50. May be worth me trying another carb I guess, think Iíll opt for a used OEM first though I think.

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post #22 of 37 (permalink) Old 03-19-2018, 06:38 PM
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Something that caught my attention...

I see some of the guys that are mad into tuning and mudding are drilling the slide in the carb, a 1/8Ē hole, I donít know where, I have asked the question though. @retro Iím sure you may know the answer to this?

They say it improves throttle response and 90% of the guys who are doing this donit when snorkelling.
Tuned in for this ^^^^^^^
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post #23 of 37 (permalink) Old 03-19-2018, 10:56 PM Thread Starter
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Goober, one minor correction. that is the fuel screw not the pilot jet. The pilot jet is next to the main jet inside the float chamber. Hope this helps bro
Thanks for the correction. Yup that is pilot screw not jet. So we were both halfway dere. LOLs.
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post #24 of 37 (permalink) Old 03-20-2018, 02:05 AM
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Ouch! Still quite expensive. I just looked on PSN at used OEM, around $50. May be worth me trying another carb I guess, think Iíll opt for a used OEM first though I think.
I remember working on my 450 , I had that carb off many times cleaning it and could never get it right , bought a new after market carb , which was a waste of money , got a brand new OEM carb and it ran like a scalded ape ---- you never really know with a used rig , no telling what the PO did along the way -------- I think the problem with after market carbs are they are more generic to fit several engines and not jetted for your application , threw in some poor quality work and you got a turd
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post #25 of 37 (permalink) Old 03-21-2018, 04:44 PM Thread Starter
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Iím done with the carb! Bought a new primer kit. I didnít spring for the new starter valve but I had a new spare for my 86 so robbed the oring off it.
Recently bought a set of oring probes HVAC guys use. Stripped that oring off real nice.
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post #26 of 37 (permalink) Old 03-22-2018, 06:42 PM
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Great work!
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post #27 of 37 (permalink) Old 03-23-2018, 10:32 PM Thread Starter
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Wow @retro
I put some alcohol (not fuel) in the bowl like you described and squirted it til I got some out the other end i was so surprised it shot out like a squirt gun.

Then I put the bowl on the carb. Screwed it down and started priming. I was only a dribble at first and I thot how disappointing is this how it works. Opened the butterfly and slider. Kept after it trying to see the back of the post to understand how it worked and then it started shooting about 8 feet. I was like ok now Iím Seeing how this works so kept after it to empty the bowl.

THEN I heard a little pfft and fluid started shooting a super nice tight stream over 12 feet across the garage. Holy cow now Iím impressed. Peered into the back of the carb and I clearly see the back of the post has a tiny orifice in it.

So thatís how the primer works. LOL 🤟🏻
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post #28 of 37 (permalink) Old 03-24-2018, 02:55 AM
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You got that carb ultra-clean throughout as you always do, now dint' ya...!
You are a master among the many Goober! I'm impressed, thanks for sharing all your works in these threads! :-)


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post #29 of 37 (permalink) Old 12-03-2018, 10:44 AM
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So I have a question on differences in 300 carbs.

I have a few bikes in the yard at the moment and the only obvious difference I see is in the choke plunger. Early and late are different. When was the change made?

I'm looking at a 95 carb at the moment, and it looks the same as the 97 I need, but Partzillas lists interchange at 96-up. Partzilla's schmantic images aren't working at the moment either so that's not helping my search.
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post #30 of 37 (permalink) Old 12-03-2018, 12:58 PM Thread Starter
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Hi Jeep

I have a few TRX300FW available if you want some pics.

My 93 (VE90E) carb is off the quad right nowóBTW that 86 starter valve oring (comment above) was too big for it!!!

I also have one of my work quads, a 99, carb off the quad. Yes as Sam mentioned the choke valve on the 99 is longer, thinner and has no oring compared to the 93. Maybe a different choke cable too?

I also have a 94, 95 and 96 that are 100%. I can run up to the garage and take whatever pics you need.

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