Old TRX, new to ATV, new to forum - Page 2 - Honda TRX Forum
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post #11 of 16 Old 10-16-2019, 02:00 AM Thread Starter
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Got it running. Not running very well, but running.
The fuel inlet to the carb was plugged, so no fuel. Rest of the inside of the carb looked ok, no varnish.
It bogs and dies at mid RPM.
The slide vacuum diaphragm is iffy and the Alaska plunger thing on the bowl is kaput. I might just get a carb and petcock off Amazon or Ebay (any suggestions on a good one, or one to avoid?).
Rode it around the yard (several flat open acres of desert).
Now we need a few more. I think a quad and/or dirt bike each (4 of us) and a 4 person side by side.

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post #12 of 16 Old 10-16-2019, 09:31 PM
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Best suggestion is to rebuild the original carb unless it's beyond repair
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post #13 of 16 Old 10-16-2019, 10:03 PM Thread Starter
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Quote:
Originally Posted by Here 2 help View Post
Best suggestion is to rebuild the original carb unless it's beyond repair
I think the problem is the slide diagram. Replacement for that is $60. A Chinese knock-off of the Japanese carb is $30.
Might get the knock-off and use that diaphragm in the old carb.
Other than the 2 parts mentioned, the carb was in really good condition. All the jets and passages were clear (other than the fuel inlet).
One thing that I'm glad of, it has only 1 carb. I'm used to dealing with 4 at a time.

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Last edited by patkelly4370; 10-16-2019 at 10:05 PM.
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post #14 of 16 Old 10-17-2019, 05:34 PM
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What makes you think the slide in a Chinese cheapo carb will be the same weight and dimension as the Keihin carb?

That means I can take parts from an AFB parts in a Carter carburetor or get a fuel injector for a Volkswagen diesel to put in a Caterpillar bulldozer.

Either fix the OEM carb or install a cheap piece of junk purchased from Ebay!

And the statement that "I think the problem is the slide diagram." What makes you think it's the slide? If the diaphragm is not perforated or torn, then it is not the problem.

Send me the carb and I will tell you what's wrong with it. Better than that, I'll fix it for the cost of parts and postage. I can get a new slide from Honda for $45.
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post #15 of 16 Old 10-26-2019, 03:15 PM Thread Starter
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More replacement of missing parts arriving Mon & Tue.
Hope to get it running more consistently.

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post #16 of 16 Old 10-29-2019, 01:23 AM Thread Starter
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Installed the airbox cover and seal, they were missing. This didn't help the way it was running (but it doesn't hurt either).
The exhaust heat shield arrived this morning. Purely a comfort item.
This afternoon got the new petcock and carb kit.
Installed the new petcock. The old one leaked and the screen was nonexistent, mostly. The base of it was corroded to the tank outlet. It appears someone poked out (in?) the mesh.
It now runs much more consistently once well warmed up. Previously it would not rev to higher rpm, or it would bog at low rpm but run good n fast. Now it does both.
I may still install the carb kit, mostly for the new float needle/seat. The carb was varnish-free despite the fuel inlet initially bring clogged.
Getting closer to trusting it enough to ride it somewhere other than our flat average. Live in rural AZ next to a few rugged mountain ranges, like just a few miles away on each side of our valley.
Once running right, it will need front wheel bearings and the left rear tire has a slow leak (2-3 day leak).
New rear axle spins by hand and has no play. Lock nuts still tight (I marked them).

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