The first to thiss thread, arn't i lucky . : ) , its either the bog or your jettings off, if you've done the zip tie mod that should of elimnated the bog completely (so they say) so its probably your jetting. Someone will put more insight to this but it could be your valves, if your motor has alot of hours on it since last checked bring it to a dealership and get them to check them if you cant. The resistor kit is mainly needed for 04's but some 05's have the problem too as i understand, run it as it is and if it kills your battery then your one of the unlucky 05 owners to have the problem.
New To 450s Have A Few ?s
First off hello to everybody. Ive been riding for about 18 years and just came got back into sport quads. As a since Ive always bled yamaha blue there was only one choice. Now on to business
#1 When i pin the throttle from idle it dies. No trying just dead. Is this THE BOG i keep reading about? I did put in the zip tie and it still dies. Whats the deal? I have no idea what jets are in it. Its an 05 and has a (soon to be replaced) White Bros slip-on and no lid.
I haven't got to really do any riding due to the weather but this dieing out sucks
#2 It has a very noticeable tapping coming from the engine. Doesn't really sound like a knock just a loud tap. Could this be the sign of needing a valve adjustment?
#3 does the 05 have the overcharging problem? If so where can I pick up the resistor kit?
I'm sure there will be more to come but any help would be greatly appreciated
#1 When i pin the throttle from idle it dies. No trying just dead. Is this THE BOG i keep reading about? I did put in the zip tie and it still dies. Whats the deal? I have no idea what jets are in it. Its an 05 and has a (soon to be replaced) White Bros slip-on and no lid.
I haven't got to really do any riding due to the weather but this dieing out sucks
#2 It has a very noticeable tapping coming from the engine. Doesn't really sound like a knock just a loud tap. Could this be the sign of needing a valve adjustment?
#3 does the 05 have the overcharging problem? If so where can I pick up the resistor kit?
I'm sure there will be more to come but any help would be greatly appreciated
1 - 20 of 21 Posts
since its a new quad, i would check the valves anyway, but you tend to hear a little noise coming from the engine, so it could just be routine, i would still check the specs anyway just to be sure.
as for the dieing out, change out your leak jet, see if that helps, how does the bike run other wise? does it seem strong as long as your not stabbing the throttle?
as for the dieing out, change out your leak jet, see if that helps, how does the bike run other wise? does it seem strong as long as your not stabbing the throttle?
If it is setting in your garage and you stab the throttle and it dies, mine will try to die if I don't let off, but when your out riding and you roll in to a corner and then stab it revs out and goes like it should. Tring to get the jetting right with it on a stand in a garage is a bad idea, you need to take it out and run it when you get a chance to do it right.
Might be a dumb question but what is this zip tie "mod" you are talking about.
QUOTE (leveldrummer @ Mar 15 2009, 11:59 PM) index.php?act=findpost&pid=758200
Bike runs pretty good other wise very strong I still need to check the jets but it seems like it may be a bit lean. Tends to pop quite a bit
QUOTE (GNCCRACER! @ Mar 16 2009, 11:42 AM) index.php?act=findpost&pid=758309
QUOTE (Wisconsin_YFZ @ Mar 16 2009, 12:12 PM) index.php?act=findpost&pid=758322
The tapping has got me kind worried I'm not real familiar with the bikes but it just seems kinda loud for valves but it really don't sound like a hard knock. I Just hope its not the beginning of a rod bearing going downsince its a new quad, i would check the valves anyway, but you tend to hear a little noise coming from the engine, so it could just be routine, i would still check the specs anyway just to be sure.
as for the dieing out, change out your leak jet, see if that helps, how does the bike run other wise? does it seem strong as long as your not stabbing the throttle?[/b]
Bike runs pretty good other wise very strong I still need to check the jets but it seems like it may be a bit lean. Tends to pop quite a bit
QUOTE (GNCCRACER! @ Mar 16 2009, 11:42 AM) index.php?act=findpost&pid=758309
it will do it while riding IF you let the rpms get down low other wise the need to hold on increases greatlyIf it is setting in your garage and you stab the throttle and it dies, mine will try to die if I don't let off, but when your out riding and you roll in to a corner and then stab it revs out and goes like it should. Trying to get the jetting right with it on a stand in a garage is a bad idea, you need to take it out and run it when you get a chance to do it right.[/b]
QUOTE (Wisconsin_YFZ @ Mar 16 2009, 12:12 PM) index.php?act=findpost&pid=758322
Check the stickys in the Tip and Tricks section THE BOG threadMight be a dumb question but what is this zip tie "mod" you are talking about.[/b]
if its bogging out when it gets a really low rpm, have you considered that the rpms are way too low? maybe just adjust your idle up a little more?
QUOTE (leveldrummer @ Mar 16 2009, 10:14 PM) index.php?act=findpost&pid=758603
It did cross my mind but then again i thought it was idling to high until everyone told me that's how a 450 idles i think stock spec is something like 1800 rpm and it sounds about right don't have a tach to check it and be sure though. It could just be me over thinking it and not being use to riding a 4 stroke i guess. I love the quad but its a whole other world lolif its bogging out when it gets a really low rpm, have you considered that the rpms are way too low? maybe just adjust your idle up a little more?[/b]
ok so when i bought mine i had the same issue i thought something must be wrong but idk what this zip tie mod is? but i rejetted it and put a fuel screw in and then it ran great
A little update took a look at the jets last night and we have a 42 pilot and 168 main so looks like they only changed the main. Would a 45 pilot be enough should i go on to a 48? also changed the oil and pulled the screen from the oil tank and no metal was present on it or the filter. Didn't get into the valves yet maybe 2day.
I may have missed it but I didn't see it posted..... What kind of exhaust/ air filter are you running? Stock or aftermarket? If aftermarket, what brand of each? Airbox lid off? No air box? Also, what elevation are you at? All these things can and will affect jetting specs.
There are many people in here that know more about jetting than I do, but answering these questions will help them to help you.
There are many people in here that know more about jetting than I do, but answering these questions will help them to help you.
QUOTE (SpillDaThrill @ Mar 18 2009, 07:50 AM) index.php?act=findpost&pid=759131
white bros slip-on, no lid, uni filter, around 400 or 500 feet elevation i thinkI may have missed it but I didn't see it posted..... What kind of exhaust/ air filter are you running? Stock or aftermarket? If aftermarket, what brand of each? Airbox lid off? No air box? Also, what elevation are you at? All these things can and will affect jetting specs.
There are many people in here that know more about jetting than I do, but answering these questions will help them to help you.[/b]
45 pilot is going to be your friend... might try a 165 main...
For reference when i was slip on with K&N kit i ran 168/ 48 on the Oregon Coast (sea level obviously)
With an FCI i'm at 178/48
For reference when i was slip on with K&N kit i ran 168/ 48 on the Oregon Coast (sea level obviously)
With an FCI i'm at 178/48
As far as the engine noise goes i hope that its normal cause mine sounds the same when cold. But if you think about it mabey it is normal cause most cars have a slight ticking/tapping noise when temps are low aswell...
i think someone put a bomb in your cylinder
Mine has always made its share of ticking noise since I've bought it brand new. If your worried, make sure you check valve clearance, and always use a good oil. I know AmsOil comes highly recommended by many here.
1.The dead quad when you snap the throttle exist with all the FCR carbs and mark my words, you will not ever eliminate this.
Maybe improve it, but eliminate? no.. Believe me it used to piss me off to but until thought, when am I in neutral and need to go from idle to 10,000 RPM in a fraction of a second.. Neuver. Mine doesn't effect riding what-so-ever and.. Man this is hard to explain and i'm probably going to get crap from lots of people... Yes it will die because of the air you just let in so quick, can you fix this? no. But when you give it throttle a bit over or more over idle and then snap it, it's perfect!
Just the way the carbs are.. Sure the R&D adjustable leak jets and everything fixed the throttle response. (I have one)
But snapping the throttle wide open from a idle in a sudden STAB will kill your 450.. especially thumb throttle versus twist because you can snap it faster with a thumb..
Any one understand me or am I just full of it..??
2. Too many noises to be described in my opinion. But you might want to get a New crank in there before your end up needed a whole motor like I did in my 04.. AND STAY AWAY FROM HOTROD! buy a OEM way before hotrod.
3.Also if you feel like you are having battery problems or dim lights.. could be your battery being old and if not that then the new batterys are about 100 bucks! I am not as knowledgeable about the stator and crap, and would love to hear someone elses answer before my own.
Maybe improve it, but eliminate? no.. Believe me it used to piss me off to but until thought, when am I in neutral and need to go from idle to 10,000 RPM in a fraction of a second.. Neuver. Mine doesn't effect riding what-so-ever and.. Man this is hard to explain and i'm probably going to get crap from lots of people... Yes it will die because of the air you just let in so quick, can you fix this? no. But when you give it throttle a bit over or more over idle and then snap it, it's perfect!
Just the way the carbs are.. Sure the R&D adjustable leak jets and everything fixed the throttle response. (I have one)
But snapping the throttle wide open from a idle in a sudden STAB will kill your 450.. especially thumb throttle versus twist because you can snap it faster with a thumb..
Any one understand me or am I just full of it..??
2. Too many noises to be described in my opinion. But you might want to get a New crank in there before your end up needed a whole motor like I did in my 04.. AND STAY AWAY FROM HOTROD! buy a OEM way before hotrod.
3.Also if you feel like you are having battery problems or dim lights.. could be your battery being old and if not that then the new batterys are about 100 bucks! I am not as knowledgeable about the stator and crap, and would love to hear someone elses answer before my own.
No, i agree, you are correct, especially if you have a k&n, that massive gulp of air is hard for a carburator to compenatse with the proper mix of fuel. My harley "coughs" if you do the same thing.
Thanks for all the replies guys. Soon as i can get a little time off from work in gonna take a look at the valves with my fingers crossed hoping there the problem. The quad runs awesome so I'm just gonna bump that pilot up to a 48 for now and leave the main at 168. As for the dieing I have noticed it while ridin but I really believe its me just needing to get use to it.
Is the "tapping" at idle? If so it could be your carb:
http://yfz450.theatvchannel.com/invision/i...showtopic=94838
http://yfz450.theatvchannel.com/invision/i...showtopic=94838
1 - 20 of 21 Posts
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