Video from Leota Michigan on our 400's 5-30-2020 Was A nice Afternoon.
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By gordonmacritchie
on my honda trx 500 we have no power to the ignition switch for starting or ignition
we have lights and horn working
all fuses are fine
have traced through the harness and cant find any broken wires or bad connections
from what we have gathered so far the pgm fi unit is not sending any power to the fuel pump relay to power everything up.
if we put power direct to the ignition switch plug then everything works but wth the key in the off position.
does this sound like a faulty pgm fi unit?
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By Admin
View File 1986-1989 Honda TRX350 Fourtrax TRX350D Foreman service manual
1986-1989 Honda TRX350 Fourtrax TRX350D Foreman service manual
Submitter Admin Submitted 03/08/2026 Category Honda ATV
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By sunn
Maybe someone has the answer to correct a long cranking but did start after maybe 10 seconds?
Temp was mid 70's, with ATV not run for maybe a month but on battery maintainer with full bat charge noted. The atv started, but then died a couple times after repeated attempts. But when run awhile everything was ok. Although when starting now I do hear the fuel pump humming but seems to take a few ,"long" seconds before full prime pressure.
Is this typical of a failing fuel pump?
I've priced a replacement fuel pump on eBay for less than $40 so am tempted to simply replace it for good PM. Just had all covers off so looks really easy to replace.
Any ideas?
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By toe420
Hey everyone, I just picked up a 91 trx350 4x4 with a blown top end. I don't know what happened to the poor thing but the cam journals that were round are oval shaped now. I also bought a running engine from a 92 trx350 4x4 to swap into the 91. Is there anything in particular I should be checking while the engine is out and I have good access to it and the frame?

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