Made the same mistake with the same results. Used the head gasket that came with my big bore kit and coolant was blowing out the reservoir breather tube. Just ordered the Cometic gasket. wish I did it the first time.
What's involved with doing the 686 102mm mod to a 660 raptor? Is it a simple as picking up a 102mm piston boring the stock cylinder out? I have an 01 I bought in 07 and it's due for a top end freshening, a float stuck few years back and flooded the crankcase with gas and I think it may have washed the cylinder down and did a little ring/bore wear and it's puffed a little bit ever since. So it needs a top end job or at least new rings but there's probably mild scoring? and the timing chain is getting bit noisy, So I was kicking the idea around of doing the 686 mod during the top end re freshening. It has a hot cam but not sure which one interested to see which level probable just a level 1 because the engine is otherwise un modded as far as I know just bolt ons but even with a cam, dynojet kit, k&n filter with box mods, full exhaust (big guns header, white brothers R4 slip on) and lower gearing (-1 tooth countershaft +2 teeth rear) and 18"s on back it's pretty lively now, it tops out around 60mph now but riding it around it wants to yank your arms out of the sockets and keep front tires airborne all the time. I just didn't see where I needed a 80mph wheeler I'd rather have the retarded torque.
Quick question. Why is there not as many holes in the head gasket as there is in the head and valve cover? My rappy is doing the exact same thing. Did a big bore kit. And now have what I believe have blown my second head gasket for it keeps blowing the reservoir tank cap off and blowing all the coolant out. Does it really come down to name brand head gasket for everything to be fine?
I put a new cylinder with a milled head on my 660 Rhino. It wont run because the cylinder hydrolocks from antifreeze. I just noticed i dont have the beveled o ring at the base of the cylinder. Could this be my issue?
Yea man I was having problems at the top end pretty much ruled everything out it did smoke a little bit but I just ordered a 686 kit with name brand gaskets what jets would you recommend tho idk if you’ll respond here but if you do it’s much appreciated
I want to thank you for you posting your videos I have subscribed! The question I had you answered in the first sentence in this video any 660 gaskets will work 686 Big Bore I just built a 686 and the head gasket blew so I was searching for good gaskets and could not find a gasket for 686 always kept coming up 660 thanks again and what Jets do you recommend
I would google jets and read the setup of others, then go from there one notch up on pilot and about 150 mains is a starting point, then ride and see if it's fat or lean
Hello, I have an 05 Yamaha Raptor 660r. I put the 686 big bore on it, but there are already two head gaskets that I changed and it has a coolant leak. I watched your video and decided to buy the cometic gasket. Do you recommend applying ..(cooper spray a gasket).. for better quality or not needed i would appreciate if you answer me thanks
What is the best most reliable bolt on kit for 02 grizzly 660 on pump gas? Besides big bore kit what else needs to be done for good running and reliable operation of said big bore kit?
Hey I've got a 04 660 that I just bought a 686 kit for and yeah I used the gasket that came with the kit and immediately had pressure start bleeding into the radiator and anything other than idle would blow coolant out the pipe and anything much above idle would just blow the cap off and I'm just sick came out of time it took to do this and I know I had my head checked I had my block checked when it came just to verify everything was right and still didn't go together right I'm so bummed I wish I had watched this video
Wanted to know i have a 660 raptor and its seeping oil out of head gasket and burns oil at idle or heavy throttle is the head gasket or oil ring wanted to know you thoughts on it please
Cylinder works and Athena are good, the no name 660 kits on ebay seem to be ok, but the gaskets are junk, be sure to buy good gaskets, moose, cometic, etc
no, but that is definitely a bad head gasket or cracked head. Mine was pressurizing the coolant catch tank and making its push in cap pop off. and cutting out at high speed revs
@@Lil4olk6 normally as long as the engine lasts, but 686's are picky. it's best to get the stud kit for the head and be sure to buy a name brand gasket
Just installed a big bore kit on my 2005 Raptor and hear a faint knocking sound that wasn’t there before. Didn’t think to check ring gap. Could that be the problem?
![PL/US[part 2] valve adjustment Yamaha XVZ 1300 Royal Star Venture 2003 90890-04105 how to use wrench](http://i.ytimg.com/vi/k7ieEUhqpy8/mqdefault.jpg)
Thanks for this ! I just ordered a 686 kit because the last head was junk. I’m glad I saw this video. I ordered a Cometic just now for it
Well done!
@@geezermoto7820 please help do I have to gap the rings ? If so gap them to what specs ? Think you I can’t find anything
@@nickmartin7024 no, they are pre gapped
Made the same mistake with the same results. Used the head gasket that came with my big bore kit and coolant was blowing out the reservoir breather tube. Just ordered the Cometic gasket. wish I did it the first time.
I got the cometic now and man does she rip no problems at all!! Holding compression!!
Can I use a stock 660 head with the 686 big bore kit
What's involved with doing the 686 102mm mod to a 660 raptor? Is it a simple as picking up a 102mm piston boring the stock cylinder out? I have an 01 I bought in 07 and it's due for a top end freshening, a float stuck few years back and flooded the crankcase with gas and I think it may have washed the cylinder down and did a little ring/bore wear and it's puffed a little bit ever since. So it needs a top end job or at least new rings but there's probably mild scoring? and the timing chain is getting bit noisy, So I was kicking the idea around of doing the 686 mod during the top end re freshening. It has a hot cam but not sure which one interested to see which level probable just a level 1 because the engine is otherwise un modded as far as I know just bolt ons but even with a cam, dynojet kit, k&n filter with box mods, full exhaust (big guns header, white brothers R4 slip on) and lower gearing (-1 tooth countershaft +2 teeth rear) and 18"s on back it's pretty lively now, it tops out around 60mph now but riding it around it wants to yank your arms out of the sockets and keep front tires airborne all the time. I just didn't see where I needed a 80mph wheeler I'd rather have the retarded torque.
You buy a cylinder kit
Comes with everything
You buy a name brand head gasket
Bolt it up
Jet the carbs
Quick question. Why is there not as many holes in the head gasket as there is in the head and valve cover? My rappy is doing the exact same thing. Did a big bore kit. And now have what I believe have blown my second head gasket for it keeps blowing the reservoir tank cap off and blowing all the coolant out. Does it really come down to name brand head gasket for everything to be fine?
Yes it does . Get a Cometic 660 head gskt
@@geezermoto7820 will do thanks!
@@captlou7548 welcome!
I put a new cylinder with a milled head on my 660 Rhino. It wont run because the cylinder hydrolocks from antifreeze. I just noticed i dont have the beveled o ring at the base of the cylinder. Could this be my issue?
Could be but be sure you are using a name brand head gasket, cometic, moose, etc
Yea man I was having problems at the top end pretty much ruled everything out it did smoke a little bit but I just ordered a 686 kit with name brand gaskets what jets would you recommend tho idk if you’ll respond here but if you do it’s much appreciated
I want to thank you for you posting your videos I have subscribed! The question I had you answered in the first sentence in this video any 660 gaskets will work 686 Big Bore I just built a 686 and the head gasket blew so I was searching for good gaskets and could not find a gasket for 686 always kept coming up 660 thanks again and what Jets do you recommend
I would google jets and read the setup of others, then go from there one notch up on pilot and about 150 mains is a starting point, then ride and see if it's fat or lean
And yes, the 686 kits come with trash head gasket lol
Installed a cometic and everything is a ok tons of power and holding compression!!
Start with 150 mains then jet it from there, go one larger on pilot
I have 165 and a 170 and a 27 on the pilot one clip down on the needle and it screams!!
Hello, I have an 05 Yamaha Raptor 660r. I put the 686 big bore on it, but there are already two head gaskets that I changed and it has a coolant leak. I watched your video and decided to buy the cometic gasket. Do you recommend applying ..(cooper spray a gasket).. for better quality or not needed i would appreciate if you answer me thanks
No, just use dry
What is the best most reliable bolt on kit for 02 grizzly 660 on pump gas? Besides big bore kit what else needs to be done for good running and reliable operation of said big bore kit?
You must jet richer if carb or re-map with a tuner if injected. That's it
Hey I've got a 04 660 that I just bought a 686 kit for and yeah I used the gasket that came with the kit and immediately had pressure start bleeding into the radiator and anything other than idle would blow coolant out the pipe and anything much above idle would just blow the cap off and I'm just sick came out of time it took to do this and I know I had my head checked I had my block checked when it came just to verify everything was right and still didn't go together right I'm so bummed I wish I had watched this video
Sometimes we simply do not know, until we know, I've been where you are and made a video cuz it broke my heart too! Lol
Wanted to know i have a 660 raptor and its seeping oil out of head gasket and burns oil at idle or heavy throttle is the head gasket or oil ring wanted to know you thoughts on it please
I would say needs new top end
@@geezermoto7820 👍 will do a 686
Hi i am about to try and do headgasket on mi 660r 2003 any info would be much appreciated 👍
Buy a name brand head gasket like "Cometic" for example then just torque it up per service manual instructions
I don't see any vid on tearing down top end of a 660 raptor to change head gasket Please help!
Just get a yamaha factory service manual and follow along... Pipe and carbs off, valve cover off, cam chain tensioner out, cams out, head off
Cam out to change head gasket?
@@eddiegraham4154 yes
What is a good aftermarket cylinder brand? I've heard they can be junk.
Cylinder works and Athena are good, the no name 660 kits on ebay seem to be ok, but the gaskets are junk, be sure to buy good gaskets, moose, cometic, etc
@@geezermoto7820 Thanks you!
@@chad3308 welcome bro!
What do you torque the head bolts to?
I read 32ft lbs
Why is my 2001 660 Raptor smokes?
what mods needs to be down on the carb to put that 686
or any other mods to the valvs also
Just have to jet the main jets 2 sizes larger and pilot jets one larger then see what you have....you can Google lots of tuning tips on the 686
Is the sleeve suppose to lower then the jug on 660 raptor
Should be flush, or even on top
Look at used ones on ebay
Was the coolant blowing out the pipe?
no, but that is definitely a bad head gasket or cracked head.
Mine was pressurizing the coolant catch tank and making its push in cap pop off. and cutting out at high speed revs
@@geezermoto7820 I put a new head gasket on it and it ran fine for about an hour then white smoke started coming out the pipe
@@Lil4olk6 that is coolant
bad head gskt or cracked gead
So how long did the regular gasket hold? because I got a 686 on mines too.. just hoping it’s not a cracked head
@@Lil4olk6 normally as long as the engine lasts, but 686's are picky. it's best to get the stud kit for the head and be sure to buy a name brand gasket
What is the ring gap supposed to be on the 686 Big Bore Kit ?
top ring .008-.014 limit of.024
2nd ring .014-.020 limit of.033
oil ring .008-.028
Often times they are bigger gaps than this out of the box, just run them or find file to fit rings, just running them will be fine
Thank you one more question, what spec do you normally torque your head bolts to?
@@gregrobinson4122 27 to 30 ft lbs
Just installed a big bore kit on my 2005 Raptor and hear a faint knocking sound that wasn’t there before. Didn’t think to check ring gap. Could that be the problem?
Very good video amigo.
Send the Chinese bikes to me.
ok senior, how is it over there in your awesome motorcycle shop?