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Old 04-18-2011, 11:09 AM   #121
bholmes
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Joined: Mar 2010
Location: Arvilla, WV
Oddometer: 1,577
Can we call mine an X now?[IMG]
From Mar 12, 2011
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From Mar 12, 2011
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Old 04-27-2011, 02:17 PM   #122
chip
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Timing Chain guide broke

Changed out the stator the other day and had pieces of the aluminum timing chaing guide thing floating around in there. I read up on it on TT, but still not sure if the bike is safe for racing. It still runs and sounds fine, just not sure if it can handle a beating from a desert race. any thoughts?
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Old 04-27-2011, 05:20 PM   #123
dirtard
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Quote:
Originally Posted by chip View Post
Changed out the stator the other day and had pieces of the aluminum timing chaing guide thing floating around in there. I read up on it on TT, but still not sure if the bike is safe for racing. It still runs and sounds fine, just not sure if it can handle a beating from a desert race. any thoughts?
id say no way. granted mine is an xr650r, but my guide is just worn not broke and it was allowing the chain to ride up on the cam guide. eventually it would have popped off the cam and dropped into the case. its not that hard to pull these motors apart really fast, but it does take quite a bit of money to rebuild them from a failure like this. imho take it for what its worth and thats not much lol
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Old 05-02-2011, 07:02 PM   #124
pilo
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Joined: Feb 2005
Location: SLC, UT
Oddometer: 853
450x Bottom end

I'm racing my 05 450x in V2R and the B1000 this year. It has unknown hours on the engine. The bike has been raced before but has all of the signs of being maintained very well. The fork sliders look new and overall the bike and the engine are tight. However, I would be disappointed if the bottom end pooched out on me during either race. I never raced the X's so I know little about their longevity and failure modes. Two questions:

1) Does anyone have expereince with the cranks/bottom end going out on the 450r or x's? What are the signs? How long can they go?

2) (My preferred option) I would LOVE to get a lead on a very worn or killed X engine on complete bike so I could build a race engine ready to go for both races. Buying used is unknown, so I figured if I could find a bike with a dead bottom end I could get a good price and start with a new crank, bearings, etc. Anyone have a lead? It is a long shot I know, but it doesn't hurt to ask.
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Old 05-04-2011, 11:29 AM   #125
wrk2surf
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Joined: Dec 2007
Location: THE exact center of California/Bass lake/Yosemite
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Scott Dunleavey ... Berkley Honda.. Im sure 1 motor will be fine but if you have the money send yours to him.. Undeniably THE best .. Im sure after a refresh by him you could do both races on one motor.. no problem.. You can get X motors and parts cheap on ebay.. if you want to go the two motor route.. never heard of bottom end issues only top..
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Old 05-05-2011, 03:26 PM   #126
rmhrc628
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Joined: Feb 2006
Location: The high country VIC
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Quote:
Originally Posted by wrk2surf View Post
Scott Dunleavey ... Berkley Honda.. Im sure 1 motor will be fine but if you have the money send yours to him.. Undeniably THE best .. Im sure after a refresh by him you could do both races on one motor.. no problem.. You can get X motors and parts cheap on ebay.. if you want to go the two motor route.. never heard of bottom end issues only top..
early X models had 3rd-5th gear issues did they not?

late in 2006 there were reliefs and gallerys cut in I understand
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Old 07-15-2011, 06:01 AM   #127
hoss314
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Location: Lakeside CA
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I am having a really crappy time trying to figure out jetting for my bike in different elevations. 0'-8,000'

06' CRF 450X with brand new motor
HC piston
450R Ported head
HRC cams
modded airbox
Flexjet
FMF Powerbomb exhaust

Motor must have been more tired that I thought....before rebuild I ran 175 main, 48 pilot and needle in 5th clip. I was able to use the Flexjet to lean/richen the mixture for different elevations.

Any of you with the same experience?
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Old 07-21-2011, 11:00 AM   #128
ADVBedouin
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Joined: Aug 2009
Location: CA. Central Coast
Oddometer: 396
Set-up on my '05, ProCircuit T4 slip on, stock header, Twinair filter (no fire screen), no snorkel & 4"x5" area cut out of top of the airbox, 168 Main jet, stock needle in 4th clip position, stock pilot, fuel screw 2 turns out, air injection replaced w/ block off kit. Pink wire mod. It's set up for sea level, & just ran perfectly for 2 days in the sierras at 8-9K' elevation.

Our '06 450X Baja race bike also ran great last wkd at 8-9K' & its jetting is (motor is also bone stock);
Slow jet #48
Leak jet #65
Main jet #165
Stock needle in the 5th position
Boysen QS2 accel pump
Open top of the air box
Full SS Pro Circuit T4 exhaust
No-Toil air filter

Quote:
Originally Posted by hoss314 View Post
I am having a really crappy time trying to figure out jetting for my bike in different elevations. 0'-8,000'

06' CRF 450X with brand new motor
HC piston
450R Ported head
HRC cams
modded airbox
Flexjet
FMF Powerbomb exhaust

Motor must have been more tired that I thought....before rebuild I ran 175 main, 48 pilot and needle in 5th clip. I was able to use the Flexjet to lean/richen the mixture for different elevations.

Any of you with the same experience?

ADVBedouin screwed with this post 07-25-2011 at 04:06 PM
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Old 07-24-2011, 07:57 PM   #129
hondaboy7
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Hi I too have a crf 450x and have only ridden it for around 2.5 hours. I was in the forest the otherday when I smelt coolant and the thing was boiling! How do I prevent this

Hondaboy7
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Old 07-25-2011, 04:08 PM   #130
ADVBedouin
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Location: CA. Central Coast
Oddometer: 396
That bike shouldn't be overheating. I've had mine in some hot & slow conditions with no overheating, but I'm likely jetted slighty rich.

Does your X have the stock jetting still?

Quote:
Originally Posted by hondaboy7 View Post
Hi I too have a crf 450x and have only ridden it for around 2.5 hours. I was in the forest the otherday when I smelt coolant and the thing was boiling! How do I prevent this

Hondaboy7
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Old 07-25-2011, 05:04 PM   #131
zzlejeune OP
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Joined: Jan 2010
Location: Youngsville, La.
Oddometer: 105
Quote:
Originally Posted by hondaboy7 View Post
Hi I too have a crf 450x and have only ridden it for around 2.5 hours. I was in the forest the otherday when I smelt coolant and the thing was boiling! How do I prevent this

Hondaboy7
Mine did the same thing, I changed my main jet (142?) to a 170 (I'm at seal level) and opened up my air box, and no more overheating!
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Old 07-28-2011, 02:57 AM   #132
daffy67
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Here's mine.
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Old 08-18-2011, 09:06 PM   #133
helipilot650l
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Joined: Jul 2009
Location: Medford, Or
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Quote:
Originally Posted by daffy67 View Post
Here's mine.
Thats Great looking scooter. Take a good pic of your Speedometer. In the USA they don't have speedometers. Here is mine.
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Old 08-23-2011, 08:53 AM   #134
derrickbwg
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Location: NW Ohio
Oddometer: 72
Here is mine after replacing the stock tank with the Acerbis 4.75. I need to find a radiator guard that will fit, I had to ditch the Flatland racing guard/brace due to clearance issues.



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Old 09-02-2011, 02:23 PM   #135
thebigman
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Location: Texas Gulf Coast
Oddometer: 3,306
????? 's Inmates ,

1st are the 450x and 450r the same bike other than engine
2nd willa 250 f engine bolt in a 450x or r chassis , with no mods ,
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