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JacobSlabach

Honda Fourtrax bring back from the grave

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there were too marks on the sprocket that lined up with the head, no marks on the head.  I took the cam sprocket bolts off and got enough slack to adjust the chain and put everything back together, still ticks, but worse now.

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got it back together and started it up and it ticks worse now than it did before, thinking I dont have the timing right

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It may have been correctly timed in the first place.  Did you check the manual ? Maybe reset it to where it was. But check the manual about the alignment before yo do all this.  It’s important. 

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ok.  which manual should i get?  I'm really not sure about the year or size of this atv

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What year is that bike and the size ?

Vin#

Should be on the front frame cross bar in between the wheels 

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eh sorry- computer issues up there:wacko:  meant to say yes that looks like the head on my bike

so thats literally exactly how i checked timing- t mark on the flywheel and marks on the cam sprocket.  I'm thinking the tensioner is shot letting it jump time or the valves are incorrectly adjusted.  btw, I was wondering how you find certain info in the service manuals?  I find it hard to find the info I'm looking for and get lost lol

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Hey @JacobSlabach take a look at these two videos.  It will help you out getting familiar with that engine. The 300 and other small cc engines were pretty much built the same.     

 

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Posted (edited)

Same premise. Just to understand the head and cam removals and more important is the valve adjustment.  Did you buy a set of feeler gauges ? 

Edited by Frank Angerano

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Keeping an eye on this thread, I will love to see you get it all up and running again how it should be. I really like the Fourtraxx but couldn't afford one and ended up with a busted up Suzuki LT250 but shes well on the mend now. I have to replace the barrel next to stop her burning so much oil! maybe then I can make some money and invest in a Honda (preferably a 4x4 but not sure how much Id benefit from it as Ive never needed it with the work I do)

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awesome, its taking a back burner for now till i get another quad fixed, but its for sale once fixed and running

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ok so took the head off and found that i had indeed timed the cam to the 'F' mark which is exactly one tooth ahead of the 'T' mark on the flywheel.  re timed it back to the 'T' mark and as i was putting the head back together noticed that the intake rocker arm is worn where it contacts the cam lobe.  not sure if this really matters a lot but i did check the valve clearance at tdc and intake was 004 and exhaust was 006.  Was looking fir a new gas tank as thats the next issue..  a replacement is around $200..  the one I have has paint flakes and A LOT of rust flakes in it.  was wondering about cutting it in half. cleaning and graniding the iside down and welding it back together?  looking for advice on that..  so far I haven't put any parts into this machine but I know that it needs new brake and choke cables..  had to cut the old ones out with bolt cutters just to get the bike to roll.

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yes and it still ticks.  i think its the worn intake rocker.  what should i do with the gas tank?

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What’s the year ?

If that tank is in solid condition structurally then I would make up a tip for your compressor with maybe a 16 inch long piece of flexible copper  tube and pinch the tip a little for better pressure.  Angle the copper as needed to get inside.  Stick it in the tank and blow the shit out of it. Hit all sides and the bottom and creases as best possible. Then fill it half way with boiling hot water, add Dawn kitchen dishwashing soap put the cap on and shake the tank good.   Spill it out and rinse it all out good with a hose.  Blow it out again to get the rest of the junk and water out.  Then hit it with a hair dryer on hot so all the water inside dries up and creates no rust.  Spray the inside all around with WD 40 and let it sit a day.   

I would put a quarter tank of gasoline in it put the cap on and swish it around and dump it into a clean bucket and see if you get any more flakes or dirt.  

 

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