Yamaha Grizzly 450 - valve clearance adjustment
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- Опубликовано: 14 окт 2024
- Another of the service procedures on a 2014 Yamaha Grizzly 450 ATV. In this video I show you the correct procedure on setting the valve clearance for both inlet & exhaust.
In the video I cover what parts to remove to gain access to the engine's valve covers, all specifications & torque settings needed & also a couple of tips & tricks that make the job a little easier too...
I also explain why we have a valve clearance & what happens to it over time & why.
Any questions or comments just leave them blow and I'll do my best to get back to you shortly...
Andy Mechanic!
Videos ruined by wide angle lense. He’s a good teacher.
Excellent video have a 2012 Yamaha grizzly 450 Valve adjustment was spot on
Ive seen on another video to get better access with out removing the front Fender assembly. Is to remove the front left wheel and strut. It help to get better access to the exhaust valves.
Nice vid Andy, I have a 2006 Arctic cat 400 and have never done the valves yet, runs great. Looks like maybe I should. Cheers
Hey Andy! Great videos I watch you adjust the valves on a 450 grizzly. I assume that's the same motor in the rhino? I have a rhino 450 I've been working on, it starts up and idles push down on the throttle and it spits and sputters and bogs down want rev up.. I've took carb off and apart cleaned it. new spark plug and air filter.. No change same problem.. Any ideas? Thanks!
I adjusted the valves on my 03 Kodiak went 0.08 on Intake and 0.18 on Exhaust well with in spec and noticed it very noisy. Starts great and idles. Just a bit tap it noise. Although the Valves where never adjusted since it was new. And where way too tight before i went in there to loosen it up.
Andy, how do you keep your engine so neat and clean?? NICE! I have a good pressure washer but always had some consideration when cleaning engines. always afraid from the water causing trouble.....
Love you videos I watch them and then go do the work on my own quad with my son. My son thinks i am a genius hehehe
Legend :-)
nice video Andy, I'm working on a 2004 Yamaha Bruin 350 4x4. I have a feeling that these valves have never been adjusted. Upon pulling the starter recoil assembly, it nearly ripped my hand off. How far off are the clearances from the 2014 model from the 2004? Also I seen a tube coming off your carb? Is that going to the air box??? This one is also missing the air box as well...
Thanks for the detailed video!
did you remove the side fender to be able to adjust the exhaust valve? no room at all. trying to figure out how to get in there
Yes, side fenders and fuel tank etc...easy job and makes it much easier. Plus it's important you don't get dirt in the engine.
Many thanks for the feedback
Cheers Andy
Thanks buddy. one last question, do both in and ex valved adjusted at the same top dead center? it seems that my ex valve gap as super tight. When i set the top dead center, i aligned the straight line next to the T mark. I assume the T just marked the Top dead center while the line is the spot to be aligned?
Also doing a surgery to the leaking carburetor. do you adjust the float flat with the carb body?
Yes, line to side of letter 'T'
Float adjustment - highly unlikely it's not correct. If carb leaking/overflowing 99% chance the problem isn't float height. Adjustment method/specs vary to manufacturer - you need the Service Manual for specs and measuring method.
Hope this helps
Andy
True, it was not sealing so I just ordered a carb built kit but I was wondering how important the float adjust is. couldn't find the measurements anywhere for the Kodiak 400
Email me the full 17 character VIN. andymechanic@live.co.uk
Thanks i picked up some good tips and some sound advice. Im wondering if you would know the values of the Yamaha Grizzly 350 (2007) 2 Wheel drive auto valve clearances? Anybody?
haha!!! 31 minutes, a tea and a bacon sandwich later Great video! I will be doing this tonight along with a carb cleaning, as i have a WOT backfire/bog/loss of power, anything else you can think of that i should be looking at? I've done spark plug, belt, and checked clutches
Check intake valve for leaking too.
Cheers Andy
I have fluid draining out of a little tiny hole neck to my air filter where is it coming from and how do I fix it
Hi Roy, I replied to your first comment. Hope the info is of help. Cheers Andy
i was fighting the ex valve. doesn't matter what i do, fully open it or fully close it (with horrible access using a mirror) it seems that the gap doesn't change. looks like a fused valve. any idea how to get it loose? In valve was perfect. didn't even need any adjustment.
Rotate crank a further 360 degrees, you are not on the firing stroke
I thought both valves should be inspected on the same T line. Was I wrong?
No you are correct but remember, this is a 4 stroke engine = 2 turns of the crank shaft to 1 turn of the cam shaft. You are 360 degrees out on the crank shaft to rotate one full revolution and reset both intake & exhaust valve clearances
Oh....you get a point! so I assume i need to try rotate it additional 360 degrees and look at the ex valve. I hope that is the issue.
just emailed. thanks a lot :)
Hi... I know that this is not a Bruin video but I am wondering if you might me able to help me out a bit anyway? I have looked everywhere and I get different valve clearance setting recommendations from different places I look. Can you help me out? I have a 2006 Yamaha Bruin, Model: YFM350A - Vin: 5Y4AH10Y66A021826. The other thing is, my feeler gauge has both Metric and Inches. If you can help me out with the correct clearance settings, please tell me if they are to be used with Metric or Inches on my gauge? >
Do I need to drain the coolant fluid before removing the crankcase cover (to get to the flywheel)?
I got a carburetor question, does the small pin in the needle valve suppose to pass the air and stop when compressed or is it the entire needle valve that lifts up of the bush to allow fuel to run in? My needle valve (new) doesn't allow air flow unless i use an air compressor which blows up the whole valve and let the sir flow
The spring loaded pin is (maybe) a damper to prevent the valve 'chattering' on the valve seat which would cause excessive wear. The fuel should only pass between the valve & valve seat.
That's how I understand it. I'm sure other experienced viewers may be able to add to my comment too.
Hope that helps
Cheers Andy
@@AndyMechanic Oh wow. that helps a lot! if that is the case, mine is fine and I can finish the carb installation. I thought it might be the pin that regulates the fuel flow.
The "hinge" that binds the needle valve with the float, also slightly lifts the valve up when extremely deflected upwards. should it be like that?
Hmmmm....really? Well I think under normal operation, with the floats just 'floating' in the fuel they shouldn't reach such an extreme angle so should be fine.
Cheers Andy
@@AndyMechanic does the hinge that binds the float with the valve should be tight so when the float moves it will immediately lift or compress the valve? At the moment it is very loose fit and dangles too freely so when you move the float upwards, it doesn't lift the valve. I wonder if I should change it
The pin that goes between the two 'towers' is usually tight in the towers but the floats should be loose on the pin and flap freely.
Praying someone will tell me if these specs will work on an 07 wolverine 450 4x4
Hi Andy,,, are these clearances the same on the 2019 efi 450? I pulled out the ICV and cleaned it so wait and see how it starts up...wasn't exspecting a plunger type valve. Cheers ,,,, Chris.P
Can you email me the VIN so I can check. Ta
Ok,,, 2morrow. Cheers
If my engine backfires and wont start after valves adjustment, carb and air filter cleaning, should I check the timing chain and tensioner?
You should check both valve and ignition timing. Also do a leak down test to check your valves aren't leaking.
Good luck. Cheers Andy
@@AndyMechanic Thanks. will do it now. i want to remove the camshaft sprocket cover so i can check the timing chain position at TDC, also if it is tight. Is it possible to remove it without removing the whole plastic front of the Kodiak?
Yes, just the side panel should give sufficient access. You may want to remove the fuel tank too if too tight a space to work in.
Cheers Andy
@@AndyMechanic Thanks Andy. Ill give that a go. I want to inspect the chain tensioner if it failed. Other than checking the chain slack through the camshaft sprocket cover opening, is there another way? My ATV was running very nicely, starting easily before. I suspect something had failed ....
start whit the plug
Hi, might need a little help. I just did my first valve clearance adjustment. Everything went fine, I adjust valves, they were alil out of spec. And I adjusted them to .10mm to intake, and .20mm for exhaust. Everything seemed to have went fine, until I put everything back together and started it back up. It starts fine, but it smokes a little and can smell something burning, and it's making a loud clanking noise. I don't know if I adjusted them wrong, or what. After I tighened the locknuts on the valves, I made sure to check them again with the feeler guage. I'm not sure whats going on, but doesn't sound good... and somethings is burning.
I think I might of adjusted them while not being at the the top position. I thought I found the line, but the line I found was a half of line. But I didn't see no T. I kept turning the crankshaft but didn't see no T. I might have to redue it all over again! bleh! after being at it for a few hours.
+Rperley 84 yes, it's very important the engine is cold and the piston is at TDC when the tappers are 'off cam' ie the lobe of the cam of off the heel ( so valve fully closed)
Andy Mechanic the engine was cold. i just think I didn't have the crank lined up right.
Rperley 84 note to self. Don’t fix if it’s not broken. If your bike is starting and running fine don’t start taking shit apart!
I tried it your way. Used Max setting.. HOLLY HELL!! Wouldn't start right. Had no power! I went back in. and there set on the tight side of the settings. No value slap and she don't sound like she's flying apart.
Wow very strange. I opened the sprocket cover and while aligning the rotor T mark (TDC) the sprocket round indentation was way off!! So i rotated it another 180 degrees and it was closer but man....at least 15 degrees off. I have no idea how the ATV was working smooth before.....chain is very tight so I cant see how the tensioner is faulty. zero slack in the chain. Any ideas?....unit only backfires when trying to start the engine but it doesn't run at all (or cough)
Ensure you are looking at the correct timing marks. If they are out then you found the problem.
@@AndyMechanic OK here is the latest update and its crazy - I established the TDC using a pencil in the cylinder so pencil (piston) is at the very top, sprocket indentation mark was perfectly aligned with the crank notch AND both valves were at the top position and loose. Now, at this point i checked the flywheel/rotor T mark and it was not there at all. THAT is off. I was amazed with the IN valve as it was sssooooo open (instead of 0.1mm it was about 3.5mm!!!). reason being so is that I adjusted the valves based on the T mark of the rotor (not the sprocket as now).
Not sure how to get the rotor T mark aligned with the sprocket (without a major crank surgery)
Right....there is a chance that the flywheel has broken it's key way and slipped. To confirm this you'll need to remove the stator cover and flywheel....to do this you'll need a puller.
@@AndyMechanic it means to drain the oil I just filled too.....rrrrrrrrr
Do you have a video of you doing a similar work?
Sorry no. Not yet....
I have an I issue with my 04 450 Yamaha Kodiak and I assume is the same as this one, I changed the oil and now it starts to smoke for about 3 minutes but then it stops. Do you think it would be the valves that need to be adjusted or piston rings?
+Daniel Ceja it's not valve adjustment. I'd suggest replacing the oil with thicker type. The engine doesn't want fully synthetic. Best either mineral or semi 10w40 should be fine. It's obviously getting tired and could do with a top end rebuild, hone and new piston rings...
What if you don’t have that adjustment tool
Are you talking about the feeler gauges? Or the Tool to hold the adjuster Bolt Stationary?
Cheers Andy
0.10 intake an the 0.20 exhaust.. if you don’t have the adjustment tool .. what else buddy said I can just hear a tap an should be good .?
Yes Andy feeler gauge
Well, you'll have to source a set, they are not expensive but are a necessary tool for completing this task. I would suggest that until you get a feeler gauge set you leave the valve clearance as it is - setting it wrong can cause poor starting, burnt out valves etc
Cheers
Andy
My quad won’t start an buddy told me this is the problem cause I haven’t touch my valve in 2200 km did carb clean an spark plug ..
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