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Old 09-28-2010, 03:34 AM   #1
XRider OP
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Location: Los Gatos, CA
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XRider's Big 6

Being a shameless show-off I thought I start a thread for one of my favorite bikes, it's a plated 1996 XR600R. As some of you have heard me say before about the Big 6, there's newer, there's lighter, and there's faster, but few are as much fun and none are more reliable. My goal with this project was to mod the engine to make monster power, have enough lights so it could be seen from space, run on pump gas (91 r+m/2), and not lose the legendary reliability. This is the result, 52 horse power and 170 watts pointing down the trail.



I have lots more pictures and I'm happy to share any of the details involved with building this bike. I did all of the work myself so everything will be a first hand account. I also have pictures of the head after porting and polishing if you guys would like to see them. I suppose I should start with a parts list.

Head:
Kibblewhite Black Diamond Valves
Mega-Cycles full race cam grind #173X12
Kibble racing valve springs w/h titanium retainers
Machined valve guides (required to accomodate .405" lift cam)
Intake runners ported and port matched, exhaust runners ported, matched, and polished.
3 Angle valve seats.

Intake:
41mm FCR pumper carb (cha-ching)
Uni-Filter and back-fire screen
9 filtered air box vents
Tossed the snorkle

Exhaust: It sets off car alarms and makes babies cry!
FMF SS PowerBomb header (wrapped)
FMF Ti4 Titanium muffler & mid-pipe

Cyl:
Re-Sleeved with an XRs Only sleeve (thicker)
JE 10.5:1 comp ratio 628cc piston

Electrical:
Baja Designs dual sport kit
Baja Designs 250 watt re-wound stator (it's the sh#t)
55/60 watt headlight
Dual 55 watt projector beam halogen off road lights shock mounted on a light bar of my design. They come on automaticly when the high beam is switched on.

I know I've left some stuff out but it's getting late and I need to call it a day. Thanks for checking out the thread, I'm pretty proud of how this bike turned out.

XRs Forever!
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Old 09-28-2010, 03:55 AM   #2
D.T.
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Looks like a Scott Summers replica from back in the day. I swore I seen a picture of SS hoisting a XR600 up in a Dirt Bike magazine...
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Old 09-28-2010, 04:37 AM   #3
dirtyoffroad
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nice,very nice.
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Old 09-28-2010, 06:04 AM   #4
elsalvadorklr
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Awesome bike!

tell us more, tips on rebuilds? maintenance? please?


Thanks xrider!

Christian
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Old 09-28-2010, 06:28 AM   #5
GodSilla
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Laugh

I've got the same model, I love it to death. My KTM out-handles it and makes loads more power, but there's just some sort of shits'n'giggles factor with an XR that you don't get from other bikes.
I spent the equivalent of the market value of mine on a rebuild, and don't regret a penny. It's currently my only registered steed, and I'm happy about that.
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Old 09-28-2010, 06:57 AM   #6
AtomicXRer
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Great work. Looks like a fun bike...I really like the XRs.

small correction to your octane/knock index calc: (r+m)/2

(the scientist in me)

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Old 09-28-2010, 07:08 AM   #7
Flatulator
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Scott Summers COULD lift a 290 pound XR600 off the ground ... but he was a hard core fitness/muscle builder ... don't try this at home - unless you're one tough mofo

and he won 7 GNCC Pro Championships on one too ... while virtually all his competition was on 250 2 strokes

... the shear sound volume of that booming big bore thumper hunting them down from behind ... was outright intimidating to them ... I swear the noise alone made many people pull over some times
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Old 09-28-2010, 07:15 AM   #8
TourPros
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nice

more pics
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Old 09-28-2010, 07:16 AM   #9
laramie LC4
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great looking bike, all up to this point....
Quote:
Originally Posted by XRider
Exhaust: It sets off car alarms and makes babies cry!
gonna suck when you have an awesome bike with loads of power and lights, but no place to ride it because of all the fucking noise it created.

just sayin...

laramie
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Old 09-28-2010, 08:24 AM   #10
shortbus4x4
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Quote:
Originally Posted by Flatulator


Scott Summers COULD lift a 290 pound XR600 off the ground ... but he was a hard core fitness/muscle builder ... don't try this at home - unless you're one tough mofo

and he won 7 GNCC Pro Championships on one too ... while virtually all his competition was on 250 2 strokes

... the shear sound volume of that booming big bore thumper hunting them down from behind ... was outright intimidating to them ... I swear the noise alone made many people pull over some times
I started trail riding a Husky thumper back when just about every one was on two strokes and you aren't kidding about the noise. I used to come up on people and they would hear me and pull over, usually way before I even got on their back wheel.
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Old 09-28-2010, 08:37 AM   #11
motocrossross
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Location: southern illinois
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Quote:
Originally Posted by Flatulator


Scott Summers COULD lift a 290 pound XR600 off the ground ... but he was a hard core fitness/muscle builder ... don't try this at home - unless you're one tough mofo

and he won 7 GNCC Pro Championships on one too ... while virtually all his competition was on 250 2 strokes

... the shear sound volume of that booming big bore thumper hunting them down from behind ... was outright intimidating to them ... I swear the noise alone made many people pull over some times
I raced some national woods races back in Scott Summers' day, in the open A class, and would usually get lapped by him in the late stages of the longer races.... i ALWAYS knew when it was him coming up behind me... Big Booming Thumper coming fast... get off the trail before runs over ya!
BTW, Nice bike you got there!
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Old 09-28-2010, 08:44 AM   #12
scrminbanshee
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Would like to see some pics of the light bar.
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Old 09-28-2010, 09:52 AM   #13
XRider OP
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Quote:
Originally Posted by laramie LC4
great looking bike, all up to this point....
gonna suck when you have an awesome bike with loads of power and lights, but no place to ride it because of all the fucking noise it created.

just sayin...

laramie

Point well taken. I have a spark arrestor/quiet core I made for it when it goes in the dirt, quiets it down to reasonable levels. I don't want to be locked out of my favorite riding spots any more than the next guy. On the street I let it bark. Maybe it's the little kid in me but I love setting off car alarms with it.
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XR628R Plated and highly modified
CR500R Still rips after all these beers
RZ350L Kenny Roberts Special
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Old 09-28-2010, 06:37 PM   #14
BigNastybrp
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sweet looks good I need to come over and that thing run.
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Old 09-28-2010, 06:48 PM   #15
Ben99r1
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Light bar info please. I seen a happy trails light bar almost like yours. But they never mass produced it. The owner thought it would not sell. He had one mounted on his dr650 when I seen it. Nice looking bike. Ben
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