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Old 03-14-2013, 09:46 PM   #5656
Fishnbait
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Joined: Sep 2010
Location: Queen Creek, AZ
Oddometer: 41
Bearings

I need to replace my steering stem bearings and probably some rear suspension bearings. Does anybody have a preference on brand? Like All Balls, Pivot Works or OEM.

Any input good or bad is appreciated.
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Old 03-14-2013, 11:56 PM   #5657
Clem Kevin
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Joined: Aug 2007
Location: San Clemente, CA
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I've been replacing most of my bearings and I chose to go OEM, I feel like its the safest choice, if that's any help to you.
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Old 03-15-2013, 01:11 AM   #5658
JimmieA
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Quote:
Originally Posted by Ed@Ford View Post
holy crap...for that kinda $$ you coulda bought a whole newrebuilt 400 crank/rod assembly from wiseco and other suppliers....a few more $$ & you coulda got a stroker and made a 460 cc e-start XR!
My bike is basically brand new babied it's whole life. I didn't want to break the cases and change the crank so the crank extension. I have an EX400 crank here as well so that was an option. I'm concerned about this crank extension. The end of the crank is cone shaped with a key way. The new piece is not coned inside, it is straight so I'm worried about this a bit.
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Old 03-15-2013, 06:21 AM   #5659
Stretch67
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Under no circumstances would I run the engine like that. If the part's not made right, it's not made right, regardless of its price or intent.

Since you already have the EX crank in hand, why not do it right the first time and have it installed?
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Old 03-15-2013, 06:25 AM   #5660
Ed@Ford
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Joined: Jan 2004
Location: Dearborn MI
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Quote:
Originally Posted by Fishnbait View Post
I need to replace my steering stem bearings and probably some rear suspension bearings. Does anybody have a preference on brand? Like All Balls, Pivot Works or OEM.

Any input good or bad is appreciated.
OEM = Japanese parts

Others = chinese

I can say I've had no issues with chinese trailer wheel bearings....but their seals are junk
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Old 03-15-2013, 06:29 AM   #5661
Ed@Ford
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Quote:
Originally Posted by JimmieA View Post
My bike is basically brand new babied it's whole life. I didn't want to break the cases and change the crank so the crank extension. I have an EX400 crank here as well so that was an option. I'm concerned about this crank extension. The end of the crank is cone shaped with a key way. The new piece is not coned inside, it is straight so I'm worried about this a bit.
I've seen variations on the extension piece...all were conical shaped..this variant sounds like junk....making the double cone bit properly....high precision...very difficult to do... I think you've been had.
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Old 03-15-2013, 07:07 AM   #5662
Rojobandito
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Joined: Jul 2011
Location: PDX
Oddometer: 77
Valves

I have the head pulled off. I need someone to inspect it and maybe port and polish. I was wondering if any fellow xr owners have done a port and polish with a small overbore(maybe 416 or 426). Is the port and polish worth it? Can anybody recommend someone in the Portland, OR area to do this??
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Old 03-15-2013, 07:16 AM   #5663
RideFreak
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Location: County Lockup, NM
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Originally Posted by Rojobandito View Post
I have the head pulled off. I need someone to inspect it and maybe port and polish. I was wondering if any fellow xr owners have done a port and polish with a small overbore(maybe 416 or 426). Is the port and polish worth it? Can anybody recommend someone in the Portland, OR area to do this??
I'd send it off to XRs only, they do allot of 400s, it pays to go to someone with specific knowledge of a particular motor. The 426cc is a very reliable overbore that doesn't stress the bottom end too much, I think the 416 is a 4th overbore of the stock cyl, not much gain there.
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Old 03-15-2013, 09:17 AM   #5664
JimmieA
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Quote:
Originally Posted by Ed@Ford View Post
I've seen variations on the extension piece...all were conical shaped..this variant sounds like junk....making the double cone bit properly....high precision...very difficult to do... I think you've been had.
The cone bit is OK on the outside but not in the inside to match up with the XR400 cone. It is straight on the inside. I have a mechanic doing the work so I trust he will spot an issue if there is one. I just ordered a 200 watt stator so it will take a couple days for that to come in. Might as well put the right stator in while it is apart. Need the juice to charge the battery anyway.
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Old 03-15-2013, 10:02 AM   #5665
Luke
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Joined: Aug 2004
Location: Idiotville, OR
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Quote:
Originally Posted by Rojobandito View Post
I have the head pulled off. I need someone to inspect it and maybe port and polish. I was wondering if any fellow xr owners have done a port and polish with a small overbore(maybe 416 or 426). Is the port and polish worth it? Can anybody recommend someone in the Portland, OR area to do this??
Ron Black (RB Designs) did a really good job with mine. It was a slight overbore and valve cleanup. http://www.rb-designs.com He's in the West Hills. Email's the best way to get a hold of him.
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Old 03-15-2013, 02:49 PM   #5666
Danne
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Location: Trollhättan, Sweden
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Rear susp

First post.. Picked up my Xr400 about a month ago, turned out my father in law had one sitting in his garage.. Still about zero to 10 below here in sweden so riding is quite a challange. Put a new petcock and cleaned the carburettor so far and now its time to adjust the (rear) suspension.
The preload is at its lowest setting (standard spring) and i need to stiffen it. I'm about 100 kg with gear. Anybody got a clue where to start from?

Cheers

Daniel

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Old 03-15-2013, 05:26 PM   #5667
Stretch67
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Here's a good overview...

http://www.4strokes.com/tech/racesag.asp
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Old 03-16-2013, 04:27 PM   #5668
Stretch67
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Man ALIVE, I love this bike!
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Old 03-16-2013, 05:56 PM   #5669
DrLewall
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Man ALIVE, I love this bike!
uh...me too!
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Old 03-17-2013, 07:01 AM   #5670
XR4EVER
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Nice sig line, Dr. Lewall! I think I've seen that somewhere before!
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