Honda TRX 450R banner

1 - 20 of 24 Posts

·
Registered
Joined
·
132 Posts
Discussion Starter #1
I installed an HRC type endcap and took off my airbox lid. I put in a 185 main and turned the air screw out to 2.5 turns. I'm getting a slight bog (hardly noticeable but more so than stock) right off the bottom, but it runs great from the mid to top. I also left the needle at the stock position. Just wondering what my next step should be? Should I move the clip on the needle?
 

·
Registered
Joined
·
173 Posts
I haven't done it, but move you air screw out a turn or 2...this is explained a little better in exriders.com
 

·
Registered
Joined
·
986 Posts
i had my bike professionally tuned on a dyno and i still get a slight, slight bog right off idile. with no airbox lid and a good air filter that sudden rush of air when you crack the throttle is to much for the carb to keep up with so it bogs a little. i bumped my idile a little and that seemed to help some
 

·
Registered
Joined
·
497 Posts
I installed an HRC type endcap and took off my airbox lid. I put in a 185 main and turned the air screw out to 2.5 turns. I'm getting a slight bog (hardly noticeable but more so than stock) right off the bottom, but it runs great from the mid to top. I also left the needle at the stock position. Just wondering what my next step should be? Should I move the clip on the needle?[/b]
I had the same setup but had no bog, what needle are you running, you might want to try to get that HRC needle or the Sparks needle and put it on the 3rd clip position. Try turning your airscrew back to stock position and see if that helps, I never changed my airscrew position and it has been perfect with all the mods I have added.
 

·
Registered
Joined
·
132 Posts
Discussion Starter #5
I was thinking of trying the hrc needle, or maybe the sparks one. I was going to order the sparks filter so I'll see if they can send me a needle also. Thanks for the replies.
 

·
Registered
Joined
·
132 Posts
Discussion Starter #6
anyone know the part number for the hrc needle and clip? I want to check service honda to see if I can get one. also, which position does the clip go in for the hrc kit?
 

·
Registered
Joined
·
5,846 Posts
Originally posted by jmoney45@May 4 2004, 12:06 PM
anyone know the part number for the hrc needle and clip?  I want to check service honda to see if I can get one.  also, which position does the clip go in for the hrc kit?
i've seen the part # around on different threads but i don't remember what it is. the sparks needle is the same as the hrc. You would need to put the clip on the center setting.
 

·
Registered
Joined
·
3,685 Posts
thats the same set up I have....the bog that your talking about is normal. That is the way this engine runs, However if you want to try to make it better, then you need to change the pilot jet...the needle jet has nothing to do with it. needle jet is only used 3/4 to full throttle.....the pilot jet is used for idle and just off idle...get a bigger pilot jet. The sparks jet kit does not come with a pilot jet though, and I dont know about the HRC jet kit. ...the way I look at it though, is the same that sparks looks at it....who cares about the low end bog, when your never at low end....give it more gas when you take off, and your problem is solved. :D
 

·
Registered
Joined
·
132 Posts
Discussion Starter #10
i thought the main jet was 3/4 to full throttle and needle was 1/4 to 3/4?
 

·
Registered
Joined
·
3,685 Posts
Originally posted by jmoney45@May 4 2004, 12:32 PM
i thought the main jet was 3/4 to full throttle and needle was 1/4 to 3/4?
no...needle is 3/4 throttle to full, and main is full, and pilot is idle just off idle.
 

·
Registered
Joined
·
173 Posts
Lude is correct...thats what the airscrew is for (adjusting the pilot jet), when you run out of stock on the air screw, change the pilot jet.
 

·
Registered
Joined
·
5,846 Posts
Originally posted by jmoney45@May 4 2004, 12:32 PM
i thought the main jet was 3/4 to full throttle and needle was 1/4 to 3/4?
Yes, you are absoultely right.
 

·
Registered
Joined
·
5,964 Posts
Woah..a lotta conflicting "reports" on what does what...anyone wanna get a site to back up their info..now I wanna know too!
 

·
Registered
Joined
·
5,846 Posts
Originally posted by lukester720+May 4 2004, 03:42 PM-->
<!--QuoteBegin-jmoney45
@May 4 2004, 12:32 PM
i thought the main jet was 3/4 to full throttle and needle was 1/4 to 3/4?
Yes, you are absoultely right. [/b]
And idle to 1/4 throttle is controlled by the pilot jet and the air fuel mixture screw.
 

·
Registered
Joined
·
5,846 Posts
Originally posted by lukester720+May 4 2004, 03:42 PM-->
<!--QuoteBegin-jmoney45
@May 4 2004, 12:32 PM
i thought the main jet was 3/4 to full throttle and needle was 1/4 to 3/4?
Yes, you are absoultely right. [/b]
And idle to 1/4 throttle is controlled by the pilot jet and the air fuel mixture screw.

SethG you were also correct. Anything past 4 turns out on the air/fuel screw does no good, at this point changing the pilot jet is needed
 

·
Registered
Joined
·
3,685 Posts
Originally posted by lukester720+May 4 2004, 05:41 PM-->
Originally posted by [email protected] 4 2004, 03:42 PM
<!--QuoteBegin-jmoney45
@May 4 2004, 12:32 PM
i thought the main jet was 3/4 to full throttle and needle was 1/4 to 3/4?

Yes, you are absoultely right.
And idle to 1/4 throttle is controlled by the pilot jet and the air fuel mixture screw.

SethG you were also correct. Anything past 4 turns out on the air/fuel screw does no good, at this point changing the pilot jet is needed [/b]
you are close, but still wrong, check this out...here is some proof for you guys

http://4wheeldrive.about.com/gi/dynamic/of...%2Fjetting.html
 

·
Registered
Joined
·
3,685 Posts
You know, I just really started looking at this and, I think we are all saying the same thing arnt we....now Im just confused....dang it
 

·
Registered
Joined
·
5,964 Posts


Now...looking at this from our "best buds" over at exriders..how come so many people say that the pipe adds a lot to the bottom end, yet they only change the main jet? Does that make any sense at all seeing that the main jet only affects 3/4 to WOT??
 

·
Registered
Joined
·
132 Posts
Discussion Starter #20
So by looking at that, I'm thinking it is the needle. If it bogs a bit does that mean it's rich? Will a bigger needle such as a Sparks or HRC help with this?
 
1 - 20 of 24 Posts
Top