[random-strike]

I just broke in my new raptor, changed the oil and adjusted the valves. (the engine was a little noisey)

I adjusted them to this as i had found on the internet (the manual doesn't state valve clearence of course )

the valve train is pretty noisey now... but it runs fine... before i adjusted them, they were on the tight side of the spec, so i adjusted them on the loose side.

i did ~.11 on the intake and ~.18 on the exahust.

Intake .09-.13mm
Exhaust .16-.20mm
TDC Compression stroke (cold)

 

[RaptorRacer45]

I found out last night that the valve specs are listed on the Airbox lid also

 

[SULLY0556]

How long did the adjustment take you? I'm planning on doing mine for the first time but am wondering how involved it is.

 

[random-strike]

it took about an hour the first time because i had to figure out how the plastic came off.

they were too noisey for me, so i adjusted them again last night to the tight side of the spec (i dont mind adjusting them often) and they are quiet now.

it took me about 30mins. i used the starter to put the engine at tdc, and didnt take the plastic heat shield all the way off (just moved it out of the way)

 

[SMIB fursure]

dont know which manual you have but mine states it.

 

[SULLY0556]

it took about an hour the first time because i had to figure out how the plastic came off.

they were too noisey for me, so i adjusted them again last night to the tight side of the spec (i dont mind adjusting them often) and they are quiet now.

it took me about 30mins. i used the starter to put the engine at tdc, and didnt take the plastic heat shield all the way off (just moved it out of the way)

Thanks for the info! I'll be on it soon.

 

[random-strike]

dont know which manual you have but mine states it.

all i have is the manual that came with the quad when i bought it and i couldnt find the specs in it.

 

[SULLY0556]

Search the threads under Maintenance for "Manual". There's a zip-file there for the full service manual.

 

[BadRap]

I know this sounds funny but to be safe it's better to have the valves loose than tight. I’d go back and set them loose. You can use a socket to turn the engine via the hole in the side cover. That way you don’t have to use the starter.

 

[random-strike]

I know this sounds funny but to be safe it's better to have the valves loose than tight. I’d go back and set them loose. You can use a socket to turn the engine via the hole in the side cover. That way you don’t have to use the starter.

i used the starter on purpose, its faster than taking that plug out and turning the motor by hand

and what exactly is safer about having them on the loose side?

i already said i didnt mind adjusting them often. it'll make more power (probably not even tell though) and overall run better and quieter with them on the tight side.

 

[06700GUY]

The valve gets burnt up when its to tight because the valve is not seating all the way. When the valve sits, it transfers its heat to the head. So if it never sits all the way, it doesn't cool. That's why, when adjusting your valves, it's better to be a little loose than tight. The most important part of an engine is breathing. If the valves are (to loose) not opening wide enough your engine isn't getting enough air. The less air your motor is getting, the less power it makes.

 

[random-strike]

The valve gets burnt up when its to tight because the valve is not seating all the way. When the valve sits, it transfers its heat to the head. So if it never sits all the way, it doesn't cool. That's why, when adjusting your valves, it's better to be a little loose than tight. The most important part of an engine is breathing. If the valves are (to loose) not opening wide enough your engine isn't getting enough air. The less air your motor is getting, the less power it makes.

thanks a lot expert engine man

THE VALVES ARE WITHIN SPECS. THE SPECS WOULD NOT BE THE SPECS IF THEY DIDN'T LET THE VALVE CLOSE ALL THE WAY. THE MOTOR WILL RUN LIKE COMPLETE SHIT IF THE VALVES NEVER COMPLETELY CLOSED.

THEY ARE ON THE TIGHT SIDE OF THE SPEC BECAUSE THE NOISE BOTHERS ME.

thanks for reading

 

[SULLY0556]

Whoa big fella, no need to get pissy. It's your bike and most of us are just here to give opinions and get advice. Use the info you want and forget the rest. Years of experience has taught me that going off on someone only makes you look like an ass. :sherlock:

 

[random-strike]

Whoa big fella, no need to get pissy. It's your bike and most of us are just here to give opinions and get advice. Use the info you want and forget the rest. Years of experience has taught me that going off on someone only makes you look like an ass. :sherlock:

8)

 

[SandDragon]

Whoa big fella, no need to get pissy. It's your bike and most of us are just here to give opinions and get advice. Use the info you want and forget the rest. Years of experience has taught me that going off on someone only makes you look like an ass. :sherlock:

This guy, random-strike, is an ass, won't be here long :grin_nod: I hope

 

[SULLY0556]

Doesn't matter to me who's on the forum, Everyone obviously has info to share. We all have big hairy ones, otherwise we'd be driving utility quads. I take everyone's suggestions and use what I like, if I don't like a suggestion, I just don't use it but I won't dog a guy for tryin' to help or for asking a question. That's just being a dick. :slap: :stfu:

 

[Chicagoland Atv]

Valves are be set to within the spec. It is true, if you set them to the tighter side of the spec, it will be a little quieter but also you need to take in consideration that valves expand with heat which takes up more gap. If the gap it takes up is out of spec, then it can end up burning up the valve. It also can cause detonation and ultimately can cause valve seat damage. Personally, when I set my valves I set them to about the middle of the spec knowing when they tighten up a little they should still be with-in the range called for.

 

[06700GUY]

and what exactly is safer about having them on the loose side?
[/quote]

Look dude I was just trying to help out and answer your question.....If you don't want to know then don't ask!

 

[SULLY0556]

06700 guy, 99% of us DO appreciate the input so don't let a few negative comments get to ya! We need to stick together to keep up on the latest mods and fixes! Thanks!!!!!! :thumbsup:


Joe

 

[BadRap]

I think the question has been answered.