Holy cow this thing rips!!


20 replies to this topic
  • wickedsprint

Posted January 21, 2006 - 01:58 PM

#1

Took the beast out to some local dirt roads and I think this monster might actually outgun my old KX500, the KX500 was not near as responsive and once it came on the pipe it exploded into wheelspin, but this thing is like a missile, point and shoot, I have never experienced that sensation of acceleration in the dirt. I finished uncorking it this afternoon so the first ride was uncorked, two turn out on the pilot, stock pilot jet and a 168 main with the needle in the 3rd clip from the top (one clip richer) This bike is an animal.

  • Phuzzy McPhuzzface

Posted January 21, 2006 - 02:27 PM

#2

I'm jealous, you bastid! :bonk:

The choice was a tough one for me between my L, and the R. I love my L, but I want both, dangit! :thumbsup: :thumbsup:

  • wickedsprint

Posted January 21, 2006 - 02:33 PM

#3

You live in Texas, one of the easier states to plate stuff right? Find a buddy and try an R. I think you will find a reaosn to own both. Don't ever get rid of your L though, they are fantastic bikes.

  • snaggleXR650

Posted January 21, 2006 - 02:34 PM

#4

Glad to hear.
Did you swap out the intake manifold, remove the airbox restricters, swap to a UNI airfilter with hi flow backfire screen, drill out/put a new tip on the stock pipe? If not, then you still have more arm pulling power to uncover...

  • wickedsprint

Posted January 21, 2006 - 02:45 PM

#5

I drilled the stock tip, yanked both baffles and replaced the intake manifold, so this is pretty much it until I get the Edelbrock carb. It is still a bit cold natured to start, but to its defense it was 29 ish out when I went for a ride, when warmed up it starts first kick though. It is still one of the easiest kickstarting bikes I have ever played with.

  • AzMtnThumper

Posted January 21, 2006 - 04:04 PM

#6

Pretty fun huh? I'd look at the plug - you may still be a little lean with a 168 main jet. I don't know what elevation you're riding at but I'm riding a lot at 7000' and I find the 172 main is pretty good for my uncorked BRP. FWIW I run the 175 main at elevations below 3500'.

  • wickedsprint

Posted January 21, 2006 - 05:19 PM

#7

I am at 6200 feet, the other jet I grabbed is a 172, I may toss it in, according to the 650R jetting guide I should be with a 165..yikes.

  • AzMtnThumper

Posted January 21, 2006 - 09:42 PM

#8

I didn't look at the jetting guide (maybe I should have). My bike sputtered at 7000' at wide open throttle, when I placed a 172 in the sputtering stopped. It's still a bit rich (plug is dark) but I like it that way. Some rides I go on have substantial elevation changes, but I feel confident that it's not too lean when I get down to 4000'.

  • resslera

Posted January 21, 2006 - 10:09 PM

#9

Just curious what jetting guides you are looking at. I'm at 6,500 and ride up to aroun 9,000 and right now uncorked I'm 160 on top with the stock pilot. This was as recommended by those who ride in this area.

  • wickedsprint

Posted January 21, 2006 - 10:30 PM

#10

The one on the 650R.us site, all I know is that at 6200 feet with a 168 it pulls like crazy, but Inever rode it uncorked.

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • motopsycho650

Posted January 22, 2006 - 08:37 AM

#11

Man, don't believe the jetting guide on xr650r.us. It's WAY wrong. I ride at 5,000 to over 10,000 ft. sometimes. I have it set up as follows:

HRC Intake
HRC Exhaust Baffle
HRC Needle jet set 4th spot from top
68s pilot jet (screw adjusted 2 and 1/4 turns out).
170 main jet
K&N air filter.

I've tried a LOT of combonations, and this provides the most power throught the entire powerband. At around 9,000 ft. I have to turn the pilot adjustment in 1/4 of a turn, but I have tons of power, even above tree-line.

  • wickedsprint

Posted January 22, 2006 - 08:49 AM

#12

Thanks for the tip, I thinks ince it runs pretty well now I willleave it alone until I get the quiksilver carb.

  • resslera

Posted January 22, 2006 - 09:51 AM

#13

I have a hard time believing 170 or anwhere close to that is good at 7,000+. Isn't that the main guys use at sea level uncorked? Again, I never tried anything different up here because I based mine off settings from other 650R high alt pilots up here in CO

  • wickedsprint

Posted January 22, 2006 - 10:02 AM

#14

I have found at least with 4 stroke streetbikes that they are not all that sensitive to the main jet being used, I am guessing anything better than the 125 will be great. I am pretty sure the stock pilot is kosher, rolling in 1st and whacking the throttle open produces immediate power with absolutely zero hesitation, it is very very crisp off idle with no popping on decel, just that smooth compression braking engine note. The dealer suggested anywhere from a 168 to a 172 for mine but I am a bit skeptical running a 172 at this elevation. You said you have a 160 and it pulls hard on top?

  • wickedsprint

Posted January 22, 2006 - 10:03 AM

#15

Man, don't believe the jetting guide on xr650r.us. It's WAY wrong. I ride at 5,000 to over 10,000 ft. sometimes. I have it set up as follows:

HRC Intake
HRC Exhaust Baffle
HRC Needle jet set 4th spot from top
68s pilot jet (screw adjusted 2 and 1/4 turns out).
170 main jet
K&N air filter.

I've tried a LOT of combonations, and this provides the most power throught the entire powerband. At around 9,000 ft. I have to turn the pilot adjustment in 1/4 of a turn, but I have tons of power, even above tree-line.


If you read that jetting chart it also says to use a richer main if using the HRC baffle as oposed to a drilled one like mine, so your 170 is exactly that.

  • bork

Posted January 22, 2006 - 12:04 PM

#16

Higher elevation = thinner air= leaner gas to keep ratio in line.

  • resslera

Posted January 22, 2006 - 08:28 PM

#17

As far as I can tell, it pulls hard with the 160 on top. I just don't have anything to compare it to however. There was a 650R site on yahoo groups that I went to for guidance and apparently a guy in Denver made the most power with the 158 on the dyno.

Before my bike was uncorked, I only rode around 100 miles in the stock configuration was way rich at this elevation but still ran ok.

One problem I do have is that if I go full throttle and quickly let off the gas it will stumble a little. Makes me think I might be lean on the needle. My needle is stock in the stock position which again was recommended for my alt (~7000) being uncorked.

  • wickedsprint

Posted January 22, 2006 - 08:30 PM

#18

Then I guess I don't need to worry about being to lean with a 168. What did you do in the way of a brake light?

  • Thunderbug

Posted January 22, 2006 - 08:35 PM

#19

Took the beast out to some local dirt roads and I think this monster might actually outgun my old KX500, the KX500 was not near as responsive and once it came on the pipe it exploded into wheelspin, but this thing is like a missile, point and shoot, I have never experienced that sensation of acceleration in the dirt. .


Wait till you install the Edelbrock and drill holes in your airbox sidecover.
And when that gets boring, wait till you install the 680 jug.

Welcome to the wonderful world of the Big Red Pig.

Once you go "BRRRRRAP", you'll never go back.

  • motopsycho650

Posted January 23, 2006 - 08:17 AM

#20

If you read that jetting chart it also says to use a richer main if using the HRC baffle as oposed to a drilled one like mine, so your 170 is exactly that.


Yes, but according to that guide, I should be changing jets every 1500 ftt (or so) and with every 10 degree change in temp. I'm just saying to everyone here, the bike is not that picky. I've had my carb apart 20 times trying different combonations, (I wanted to find the best). Even at 12,000 ft., the highest I've had my bike, it runs great with the 68s, 170 combonation.





Related Content

 
x

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.