hey there everyone, I recently was given a TRX400FA 2005 by my father’s friend. it was owned and ridden by his father-in-law.

it has 3700 miles, and upon tearing into it to get to the starter and solenoid (replacing solenoid first, then ill see about the starter, because the solenoid was sticking) i found a few more problems.

One problem (that I actually read up on here) was about oil flying out when taking the fill cap off while engine is running. But a thread here said that’s normal. The dipstick tube has blow by as well but again it was said that that was normal. The oil is diluted, which should be due to a stuck float?

In any event, my plan goes as follows:
-Remove gas tank (done)
-Clean gas tank and replace screen and gauge (parts ordered)
-Replace carb (ordered)
-Check all fuel lines and clean if possible/necessary
-Actively make sure I always close the fuel valve when not in use.
-Change oil and filter (ordered enough supplies for two changes, to really make sure the oil is flushed out)
-Check compression at plug hole. There is compression there, but does anyone know how much should be there?
-New plug
-Run it.

Does anyone know about the ticking as well? My honda friends all insist that thats normal.

So I guess my three questions are as follows (summarized)
-Is the blow by at the fill cap and dipstick normal?
-What should the compression be after how many pulls?
-Should I worry about the ticking?
-Assuming this thing is good and doesnt need to be rebuilt, what else in the way of lube/oil can be done/checked to ensure this thing is 100%?

hey there everyone, I recently was given a TRX400FA 2005 by my father’s friend. it was owned and ridden by his father-in-law.

it has 3700 miles, and upon tearing into it to get to the starter and solenoid (replacing solenoid first, then ill see about the starter, because the solenoid was sticking) i found a few more problems.

One problem (that I actually read up on here) was about oil flying out when taking the fill cap off while engine is running. But a thread here said that’s normal. The dipstick tube has blow by as well but again it was said that that was normal. The oil is diluted, which should be due to a stuck float?

In any event, my plan goes as follows:
-Remove gas tank (done)
-Clean gas tank and replace screen and gauge (parts ordered)
-Replace carb (ordered)
-Check all fuel lines and clean if possible/necessary
-Actively make sure I always close the fuel valve when not in use.
-Change oil and filter (ordered enough supplies for two changes, to really make sure the oil is flushed out)
-Check compression at plug hole. There is compression there, but does anyone know how much should be there?
-New plug
-Run it.

Does anyone know about the ticking as well? My honda friends all insist that thats normal.

So I guess my three questions are as follows (summarized)
-Is the blow by at the fill cap and dipstick normal?
-What should the compression be after how many pulls?
-Should I worry about the ticking?
-Assuming this thing is good and doesnt need to be rebuilt, what else in the way of lube/oil can be done/checked to ensure this thing is 100%?