Raptor 660 Valve Adjustment Guide

[@TC_318]

You got a new subscriber from me!!! And I don’t skip the adds…. Man thank you so much for the videos on the raptor!!!! I’m not the best mechanic and don’t know everything about 4 wheelers and don’t really have people to help me figure things out…. So thank you again and please keep making these educational videos on the raptor!!!

[@chadhaas4240]

Found ur KZbin channel.. very good info u have helped me get very far on a raptor.. thanks for the videos!! Keep them coming

[@racingruss7263]

This is great...Right to the point and no music for distraction..Very well done.

[@Nate-rd8gn]

Amazing video bro!! Very clear explanation and everything is referenced back to factory specs!! You do a great job at pointing out the objects you are speaking about so it is clear for us viewers to understand what you are referencing. I just got an abused 03 raptor and I'm sure I'll be watching more of your videos. This one video made a subscriber out of me!

[@Hunters_Mechanics]

Appreciate the support!

[@Mark69Z28]

EXCELLENT TEACHER THANK YOU

[@justinblue1917]

Hey thanks for the video wlked me right thru timing my bike . Just got a 01 raptor 660 needed a bunch of work and with your videos was able to do it with minimal effort 👌 💪 🙂 thanks again 👍 😀

[@willcountypowersports6338]

Great video man straight to the point and extreme detail 👍🏼👍🏼👍🏼👍🏼

[@Smalltechguy]

Hi, straight to the point instructions. I've watched your videos before but never worked on the same machines. I've got a 2003 Grizzly 660 with the same setup. Three intake and two exhaust. I had to replace the head because the last owner never had any service done to the cooling system. My issue is that the tappets seem to keep moving away instead of tightening up since the exhaust and the intake share the same lifter. My service manual doesn't explain this and not really any video will explain this either. Hope I'm not confusing you or anyone else who reads this and can reply back to me. thanks

[@Hunters_Mechanics]

Every system is different, some tappets tighten up with use and some loosen, mine tend to tighten up and close off the clearance. As long as you check your valves every 5 or so long rides you should be fine, if its loosening up well before that and/or making noise, it might not be a bad idea to put some blue loctite on it and torque it to spec next time.

[@jasturpin63]

Excellent video and explanation

[@angelvenal2549]

This guyy!!!🔥🔥, straight to the point no BS!!! Keeep it going

[@Marco-diy-v6h]

wonderful tutorial :D Greetings from austria 😁

[@Kevin_Yagoonie]

Awesome video 👍

[@zealandwylie489]

Are the rockers supposed to have decent up and down play at TDC?

[@gabbywinter4831]

Great vidoe

[@AREA51_ATVSXS_PERFOMANCE]

Good job teaching this ! Thank you

[@triplecheese8590]

Very helpful thank you. Could you tell me where you got the chain Gard from?

[@Hunters_Mechanics]

It was on the raptor when I bought it so I am unsure :(

[@danielpeacock9508]

Have you ever had a problem with the decompression mechanism hot cam 660 raptor

[@danielpeacock9508]

I cannot get my timing set right it will turn over once in time and then just turns easy like it jumped into a tooth but it did not it's still in time with the crank and the cam sprocket.. 🤬

[@Hunters_Mechanics]

@@danielpeacock9508 I have not, ive been fortunate enough to not have one fail

[@Daszebi98]

thank you fot this video . Do i need too do this if i had torn apart the engine i mean if i pit the head off the engine block

[@Hunters_Mechanics]

If the valve cover was removed you must check the valve clearance

[@Daszebi98]

@@Hunters_Mechanics i will do this after i have Split the Engine . Unfortenally IT seems that my 5th Gear IS Not BE able too Shift Up into the 5th Gear. The Thing is that i belive the 5th Gear Driving claw has broken Off . I found a big mangled chunk of IT inside the Clutch area . After i fixed IT i will Put the Engine Back together and then i will directly Check the valves aß Long the Engine is Out .

[@Hunters_Mechanics]

@@Daszebi98 it's good that you found that issue! But I highly recommend to adjust the valves while the engine is out, the exhaust valves are a pain in the ass to get to while it's inside the chassis

[@Daszebi98]

@@Hunters_Mechanics yes man i Figured IT Out aß i watched this Video . Why couldnt they Just make the Same Covers Up that Side Like IT was in the Other side tho

[@fanofdawkins6824]

Hey, very nice video, you certainly know what you're doing, I wish I could say the same about me. I have an 05 660 that cut off on me, I took the plug out and the electrode was broken off, and I can only turn the crankshaft about 180 both ways with a socket till it comes against. And while I'm turning the crankshaft, the valves do NOT move, like not at all. What the heck do I do now?! Thanks

[@brenton1865]

Very helpful, thank you

[@newenglandlife978]

Thanks for the vid. Quick question. I see you have a Chinese cylinder. Is it any good?

[@FPVSlacker]

I had the Niche cylinder kit too. Head gasket failed after a few hours. Like everyone else, the sleeve dropped causing the failure. If you want a good kit, BP racing is where to buy. The cylinder kits come with studs, not bolts and the sleeves don't drop. Pistons are top quality. I got a Wossner 102mm piston in my kit that alone costs $180.

[@Hunters_Mechanics]

Are you the same John that has emailed me awhile back with pictures of your Niche kit and where the sleeve dropped?

[@FPVSlacker]

@@Hunters_Mechanics Yep.

[@Hunters_Mechanics]

@@FPVSlacker I tried sending you an email a few times but it kept saying failed, wanted to see what else you ended up doing with your 660. Do you happen to still have photos of the cylinder dropping and your entire kit? Plan on doing an update video in the niche stuff and would love to use your photos for reference

[@FPVSlacker]

@@Hunters_Mechanics Yes. I'll send them to you..

[@FPVSlacker]

@@Hunters_Mechanics Email sent.

[@lamarcussudds3908]

Will a 660 rhino head valve work on a raptor 660?

[@craftsman10mm]

Great video man!! Would the valves out adjustment cause a 660 to backfire and sputter while decelerating?

[@Hunters_Mechanics]

I mean any engine will have unburnt fuel come out the exhaust when deaccelerating, you'll just hear them better with an open exhaust lol but yes, your valves could be tight and too open allowing more fuel to go out the exhaust than normal

[@brad5085]

Can u make a vid showing we’re all the valve covers bolts go plz or if u know one

[@FPVSlacker]

You don't need a video. When the bolts are in the correct holes they will all be the same height above the cover.

[@Heffx.mp4]

i had a question boss. it seemd that my intake side middle valve seems pretty compressed when at TDC. It does not give me enough clearents to run the run down when I have enough clearence for spec. any suggestions?

[@charliedybala176]

Hey bud are responding questions , just message you .. I did followed your procedures and I hear valves ( metals ) loud sounding can you show us how the engine has no Run ( the noise ) with the valves adjusted please ..

[@los2mottobros359]

i can get mine right i don't know if the valves need to be up or down when turning crank to get aligned

[@jorgevirgen1660]

Hey boss, I manage to run my quad for a while, but in around 2 hours of riding it overheat. I know there could be a lot of reason that it overheat but other then the coolent what other reasons could cause this. I rebuild the water pump, I got a new thermostat, I cleaned the radiator and didn't see no leakage, radiator fan works. Could the valves not been on spec cause this or maybe my oil pump, or not clutch properly. This is my first quad.

[@jorgevirgen1660]

I been running my quad in choke, can this cause overheat?

[@Hunters_Mechanics]

What did it do by "overheating"? If your coolant flow is good, you shouldn't really have an over heating issue. It is a possibility you're not getting good oil flow, have you done the oil pressure check with the small bolt on the side of head/valve cover? Holding the choke would just allow more fuel flow but shouldn't cause a dramatic overheating

[@Hunters_Mechanics]

@@jorgevirgen1660 Have you ever taken apart the carb and cleaned it/tuned it to run without the choke? You may have commented it someone but KZbin doesn't notify me half the time of new comments

[@jorgevirgen1660]

The carb is new from Amazon. I think it came out defected. In the heating issue I am thinking it could have something to do with the oil. I checked the coolant when the quad cool down and it was fine, but the oil box seems to be empty but I don't think it leak all the oil. I only see it leak from the crank breather hose. I am thinking that the oil pump is not pumping and that the oil is staying in the bottom and when the crankshaft moves that's when it leaks oil. Thanks for replying

[@kingtoine2907]

So what was the mim and max

[@pablojimenez3941]

New subscriber. I know some people might not answer these questions and its fine if you dont. I just got a raptor 660r and need a valve adjustment. How much will this work cost?

[@Hunters_Mechanics]

That's something that you'd have to call a local dealer or local atv mechanic for, I'd assume prices are very different depending on location

[@jorgevirgen1660]

Question my quad turned off with in 5 minutes. At first I thought it was the break cable since all the symptoms were similar to those issues. They I started taking it apart and I noticed that the valves got loose. I re adjusted the valves and the quad worked good for around 5 minutes and now I believe that the clearance moved again. Do you have any tip of what could be causing this issue?

[@jorgevirgen1660]

Note when I rebuild the motor. I bought new valves from Amazon. Could that be my issue?

[@Hunters_Mechanics]

@@jorgevirgen1660 did it make any noise? Loose valves make a pretty distinctive tapping but should still run, even if its poor. Its a possibility that the Amazon valves aren't sealing properly, did you inspect them/have a machine shop do any valve work or did you just assemble them as is? Any smoke come out when it quit?

[@jorgevirgen1660]

Yes it makes a rattle noise. I didn't check the valves I got them new from Amazon and took it to a small shop. I adjusted the valves again and it seems to last a little longer. But the rattle noise is still there, but I haven't seen smoke.

[@jorgevirgen1660]

My quad is running so far but I need to keep it in choke and it making the rattle noise.

[@albertocelaya8685]

So what is the h stands for

[@gangitoslugz6718]

Hey I have a question about the water pump is the impeller supposed to be in all the way, also is the seal in the OIL seal supposed to be pushed in?

[@Hunters_Mechanics]

Kind of hard to explain it, ive got a water pump rebuild video coming up next as soon as I edit it. Do you have the manual to see the diagram of the parts?

[@gangitoslugz6718]

@@Hunters_Mechanics well I got one from online, but it doesn’t go in-depth with the position of the shaft or oil seal. What I seen was the tilt of the shaft

[@Hunters_Mechanics]

@@gangitoslugz6718 what's your email, ill share the raw footage with you so you can follow along with me, just a lot slower lol

[@gangitoslugz6718]

@@Hunters_Mechanics [e-mail] thank you very much

[@Hunters_Mechanics]

@@gangitoslugz6718 that should be all the videos need to get the impeller back in, let me know if you need anything else!

[@mamoudouseiniAbdoulkader]

Hi how i think good can u help me with my raptor 660r 2005

[@johnnicholas5263]

Why is there two "I"'s I'd the one next to the H an Intake "I" and the one after an Exhaust "I"?

[@christopherolson8757]

What does it mean if my valves don’t move while spinning counter clockwise 😮

[@Hunters_Mechanics]

Can you tell if magneto is turning as well? Can you line the "I" up at all?

[@johnvanderburgh4502]

thx good job

[@hornzthealien3125]

What brand of case saver is that?

[@Hunters_Mechanics]

I honestly dont know, was on it when I bought it and has no name nor part number

[@jeffrink6156]

What the H for on the timing marks? I'm having problems with my 04 getting it timed and to run right

[@Hunters_Mechanics]

I've got a video on my page if you need help setting it in time. I honestly do not know what the H is for, id assume its for 10° Before Top Dead Center for testing purposes of when the CDI will send the spark but don't quote me on that

[@gangitoslugz6718]

Hey I need your help if you know how to bleed coolant on a 2002 660r. Can’t find the thermostat housing on it

[@Hunters_Mechanics]

To bleed the system, you just open the radiator cap and run the ATV until you see the coolant boiling. It's a good idea to have several rags around the cap just in case it bubbles out. The thermostat sits underneath the radiator and is mounted to the frame there

[@gangitoslugz6718]

@@Hunters_Mechanics thank you 🙏🏻

[@brettgarcia1988]

So I am guessing if the valves are not set right there would be chattering when started.

[@Hunters_Mechanics]

It would be excessively loud clicking or just poor performance when starting or just trying to ride

[@brettgarcia1988]

@@Hunters_Mechanics would the adjustment be the same with the big bore?

[@brettgarcia1988]

@@Hunters_Mechanics thank you too. We as a community appreciate 🙏 it

[@Hunters_Mechanics]

@@brettgarcia1988 Yes, as long as the valve lengths have not been changed it will be the same clearance

[@brettgarcia1988]

Well I found out its the timing chain. I need to replace it. I see that you have a video on that subject. Thank you again.

[@josemorgan4524]

Mine doesn't have the Markigs when i turn the motor..😵‍💫

[@ИгорьНенахов-ф6ч]

Ребята пожалуйста покажите как снять рулевой вал,не пойму как его вытащить из подшипника

[@albertocelaya8685]

Cause I did the timimg for my yamaha raptor 660 with the h to time it is that good and I for vales

[@salvadortorreschavez6350]

Gracia amigo .

[@double0117]

660 want start man tried cleaning carbs and still just turns over and over

[@Hunters_Mechanics]

Could be a lot of thing, have you ensured you're getting spark to the spark plug, adjust the valves, ensured that gas is getting to the carbs?

[@hernandez660r]

Mine only got one 'I'

[@maddmavic]

My huge set of guage are in 1000s. Not 100s why would that be

[@Hunters_Mechanics]

Are you saying that they are all extremely tiny sizes or just more accurate?

[@elcompagordo4389]

👌

[@diondevilliers3254]

Awesome. Thank you, really helped