How To Adjust The Valve Lash On A Honda TRX250EX

[@martin-vv9lf]

thanks for the video. there was so much lash on mine from new it was like 1mm of play.

[@bossadamsgarage]

Wow that's actually insane! I'm surprised it didn't mess anything up before you fixed it.

[@601_hondas]

This actually helped alot

[@bossadamsgarage]

Glad I could help!

[@Gunner0331]

Do adjust adjust 1 valve on Tdc compression and the other on exhaust stoke ?

[@bossadamsgarage]

You adjust the valves once the "T" is lined up with the arrow in the peep hole. That's when the motor will be at top dead. If done correctly, when you start the quad, you shouldn't hear anymore top end ticks. If you do, you either need to readjust the valve lash or the rocker arm isn't properly set on the rod.

[@joelrice7113]

4 minutes ago . Question 2011 Honda Recon. Replaced top end, values and springs and oil seals. When you start it it runs wide open like you have the throttle wide open and this is from the first start after the top end and valve replacement. I thought it was the new carb I put on it so I put the old carb back on and same problem, Have not done the valve adjustment yet. Will that cause this?

[@bossadamsgarage]

It's hard to say without looking at it, but sometimes that happens when your throttle cable is too tightly adjusted. Other than that, its hard to tell if you've replaced the carb.

[@joelrice7113]

@@bossadamsgarage ​ @bossadamsgarage thanks for responding. I am an idiot. I put the pin and its housing (don't know what you call it, it's connected to the throttle) down in the carb 180 degrees backwards. The reason I did all this work is because when it gets hot white smoke rolls up from that adaptor between the carb and the cylinder. After all this it still rolls white smoke up after it gets hot. I just went ahead and ordered a OEM carb. The one I put in it was a cheap one off Amazon but both the old carb and new carb was doing the same thing. The adaptor gets so hot you can;t touch it. Oil has been changed. Any ideas? Will a oil cooler cause this?

[@bossadamsgarage]

Sounds like you're buring oil. I got a video on the channel where I had to redo the top end of the quad because of the same issue. The carb wouldn't cause white smoke. The make a lot of top end rebuild kits for these quads and its a fairly simple straight forward process if you wnated to do it yourself.

[@biodot88]

Good tip on bending the feeler gauge. Thanks for this!

[@bossadamsgarage]

Glad I could help!

[@jacobgerrells8540]

Do you have to replace the tapper covers every time you take them off or is it an inspect and replace when needed?

[@bossadamsgarage]

Totally personal preference but I would inspect and replace when needed. It is not an expensive part so just keep an eye on it and if you need to replace it you can do it then.

[@Gunner0331]

Can it be on an atv jack while this is done ?

[@bossadamsgarage]

I wouldn't see why not. As long as it is stabalized in some way, you should be fine.

[@wadenelson8278]

I have the same TRX250. Why did you not take the valve cover off. Then you would not have to bend the feeler gauge.

[@bossadamsgarage]

You cannot adjust the valves on this quad if you remove the top hat. The valves are attached to the hat.

[@bossadamsgarage]

@@user-ni8dc4or9p Serious as can be. Thats why in my video I show myself bending the guage to get the proper angle.

[@donovan-do2qs]

That's for your help man 👍💯

[@bossadamsgarage]

Glad I could help!

[@NathanThompson-g3e]

I got a question if my Honda keeps throttling but it won’t turn over the battery keeps losing energy and I just replaced the starter what should I do

[@bossadamsgarage]

What do you mean by it keeps throttling but wont turn over?

[@mattwright5878]

How do you make sure that tdc js on the compression stroke?

[@JoseHerrera-im6ih]

Exaust and admisión is the same? Clearance

[@bossadamsgarage]

On this quad it is.

[@filip6183]

what should be the valve clearances?

[@bossadamsgarage]

.13mm or .005 inches, once adjusted it'll run like a top.

[@filip6183]

@@bossadamsgarage intake and exhaust valves to the same value yes?

[@bossadamsgarage]

Yes, on this quad they are the same.

[@mr.blackbear2232]

I have done it like you said but when I put everything back together it still makes that ticking sound. Is there anything I need to do?

[@bossadamsgarage]

If the ticking is coming from the top where the cap is, you'll need to readjust the valve lash more. When you have it correct, it wont tick in the top.

[@mr.blackbear2232]

I have done it and left it a little tighter but the results were still the same. I don't know but could it be the timing chain?

[@bossadamsgarage]

The 250s for this year at least, im not sure about newer, didn't have timing chains, they have 2 metal rods. And if those rods are aligned correctly in that top hat (which they are difficult to align) that could be the noise you're hearing. You have to make sure they're perfectly flush in the divits of the rocker arms.

[@daaxter5468]

@@bossadamsgaragethey definitely have timing chains🤣 it’s in that front case my man

[@jamestennimon9974]

Needs to TDC on compression stroke not exhaust stroke

[@bossadamsgarage]

For TDC on this quad, you match up the "T" with the little arrow through the peep hole.

[@Francois_Dupont]

@@bossadamsgarage yeah, but you can be on either side of the stroke. since the crank does 2 rotation for each complete cycle.

[@biodot88]

Compression is correct. You use a straw, chopstick or long screwdriver on the spark plug hole to see it rise with the piston. Then you wiggle the valve adjusters and if they move you are at compression. At exhaust they will be tight and will not wiggle. Doing this right now.

[@Francois_Dupont]

@@biodot88 fate works in strange ways, i just did mine this morning. my TRX250 (recon) didnt have the valve access port, and i needed to remove the valve cover. also i removed the hand crank assembly to manually turn the engine with precision, but the bottom bolt snapped in the engine.(!!!!)

[@Gunner0331]

So if I’m at tdc on compression stroke the exhaust valve should wiggle and compression valve be tight ?

[@kuorjaredletoo7759]

Do I need a torque wrench?

[@bossadamsgarage]

It is probably recommended, however, I just made sure everything was snug.

[@kuorjaredletoo7759]

@@bossadamsgarage thank you any way u could make a more detailed video?

[@Francois_Dupont]

also i forgot to say, mine is a 1998 and it doesnt have valve access holes. you must straight up remove the valve cover.

[@Francois_Dupont]

where did you get your oil cooler?

[@bossadamsgarage]

That’s the stock oil cooler

[@Francois_Dupont]

@@bossadamsgarage i got the exact same bike, but it doesnt have one.

[@bossadamsgarage]

@@Francois_Dupont Really? What kind of set up does it have then?

[@Francois_Dupont]

@@bossadamsgarage nothing, just the aluminum fins on the head.

[@kuorjaredletoo7759]

@@Francois_Dupont if it’s newer than I think 13 it’s air cooled

[@zacharydavis7191]

Every time I find a feeler gage the .005 has a 0.127mm underniethe it. That correct?

[@bossadamsgarage]

No, it should say .005 above and .13mm below it. However, .127mm is pretty dang close to .13mm so I would assume that would work but I'm not certain. The feeler gauge I used in located in the description of the video if you want to check it out. Not that expensive either.

[@zacharydavis7191]

I already ordered the one in your description bossman

[@lostinacrowd]

@@bossadamsgarage .005 x 25.4 is exactly .127mm. They just rounded up on yours to .13mm.