Since it has an aftermarket exhaust, you may need to rejet. That would explain why you didn't have the problem when the float was sticking and gas was overflowing.
trx350 exhaust and tuning
anyone know where i can get a decent factory muffler for my 87 trx350 4x4? or want to trade factory for the cobra i have? ebay has one but its got holes in it and they want 90 bucks. having trouble tuning my bike and i want it quieter for hunting. cleaned carb many times, changed jets still dies when wot is applied from idle. whats got me baffled is i had some dirt in the float needle so it was overflowing. when leaking fuel the problem went away? reved up fine but cleaned it and the problem came back. cant adjust float level but would that be it? i also sometimes get a backfire and a flame out of the carb when the boot is off.
1 - 7 of 22 Posts
If you're sure it's in time and you're sure the carb is clean, try raising the jet needle up, by moving the clip down a notch.
Yes, I've seen them run a tooth off.would it run if it was a tooth off on the cam. i did just rebuild the top end so all that was disassembled.
Yeah, that's what I meant. I know it won't run right, but it will run one tooth off.sure..it will run..but it won't run right with being a tooth off..this throws everything out of spec...i've owned to many of these bikes..they are really picky !!!..lol.Yes, I've seen them run a tooth off.would it run if it was a tooth off on the cam. i did just rebuild the top end so all that was disassembled.
That's just a check for the ignition timing, you need to check the cam timing.ok so my repair manual tells me how to check timing with a light which i dont have.
The "T" mark.which mark do i use in the index hole?
No, they should be parallel to the top of the head, like in the picture below.i know the timing marks should be in a straight line up thru the center of the cylinder to the valve cover right?
The "O" points straight up. As long as both lobes on the cam are facing down when the "T" mark is lined up, it don't matter about the marks on the cam gear, anyway.there is also an "O" on the other side of the cam gear above one of the bolts that points straight up. i remember those marks now and i forgot to check those. could my valves be causing this or have somehting to do with it? checking them....use the other marks or the same one? is it ok to keep my stock jetting until i get this cured or is it gonna cause problems?
When checking the valve clearance, use the "T" mark on the flywheel, but make sure it's in time first or the valves won't be closed. The cam lobes have to be down and the valves closed to check the valve clearance.
I'm also thinking the problem is in the carb. You mentioned that you have an aftermarket exhaust. The aftermarket exhaust might be making it run lean. Backfiring is an indication that you are running lean. You might need to bump your main jet up to compensate. Either that or your carb still has some debris or something in it. Did it run right, before, with the exhaust? Did it just start doing this?
1 - 7 of 22 Posts
- This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Honda ATV Forum
We’re a forum community dedicated to Honda ATV owners & enthusiasts. Come join the discussion about upgrades and reliability for your Rancher, Foreman, Recon, FourTrax, Pioneer, and more!
Full Forum Listing
Explore Our Forums
Top Contributors this Month
View All
oldskool83
37 Replies
THEHONDABUILDER
12 Replies
Eric the red
12 Replies
Recommended Communities
