If
you are a dealer or shop that works on offroad bikes and ATVs,
e-mail us at dealers@bigborethumpers.com
and
get your shop hooked up for the latest in performance parts.
For sales questions email us sales@bigborethumpers.com
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Megan Oblonsky - BigBoreThumpers.com
rider and Team APE member. (Photo: Tony
Lamping)
A First Place Finish to End the Season!
Round six of the U.S. Desert Racing Series took place November
9 out at the Dirt Diggers riding area. While the weather was
a little bit chilly and the wind was blowing like crazy it still
turned out to be an awesome event!
Click here to read the rest... |
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BIG BORE PISTON KIT AND FINISHED BLOCK FOR EXCHANGE
Suzuki DRZ400, LTZ400 - Kawasaki KLX-400, KFX-400 - Arctic Cat
DVX400. No waiting. Send your block, we send you back a finished
assembly.
| JE +4mm piston kit 12:1 C.R. |
| OEM block bored and re plated. Ready
to install |
$349.95 We must have your cylinder
block with your order.
Head and base gasket kit - S7963 - $43.00 |
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DRZ400 HEAVY DUTY CYLINDER STUD AND
NUT KIT
Heat treated to 180,000 PSI. Centerless ground, Thread rolled.
#CSDRZ400 - $62.75 |
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WE CARRY THE
FULL LINE OF WISECO, JE and CP PISTONS FOR OFFROAD MOTORCYCLES
AND ATVs!
| COMPARE OUR PRICES |
PISTON KIT |
WISECO |
BIG BORE THUMPERS |
| YAMAHA 660 RAPTOR |
686CC BIG BORE |
$209.68 |
$146.90 |
| SUZUKI RMZ250 |
249CC HI COMP. |
$212.37 |
$148.66 |
| HONDA CRF450R |
498CC |
$229.98 |
$160.92 |
ABOVE IS JUST A SAMPLE .
CLICK ON YOUR MAKE BELOW...
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SEND IN YOUR
BLOCK CORE AND EXCHANGE FOR A NEW CP BLOCK. ALSO INCLUDED: PISTON,
RINGS, PIN, GASKETS. IN STOCK. IMMEDIATE TURNAROUND.
| A SAMPLING... |
PISTON KIT |
COMPRESSION |
INTRODUCTORY PRICE |
| HONDA CRF450R |
468CC BIG BORE |
13.0:1 |
$399.00 |
| YAMAHA YFZ450 |
468CC BIG BORE |
13.75:1 |
$379.00 |
| YAMAHA RAPTOR |
727CC BIG BORE |
13:1 |
$399.00 |
ABOVE IS JUST A SAMPLE .
CLICK BELOW...
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Web cams are recognized as the finest and fastest cams money
can buy. Webs for most ATVs and offroad bikes are available as
"Hardwelds" |
| A SAMPLING... |
LIFT / DURATION |
DESCRIPTION |
BIG BORE THUMPERS |
| HONDA TRX 400EX QUAD |
.385-.370 / 310 |
PERFORMANCE PROFILE |
$150.45 |
| KAWASAKI KX250F |
.378-.340 / 268-260 |
INCREASE OVERALL POWER |
$290.20 |
| YAMAHA YZ450F |
.356-.356 / 277-282 |
RACE PROFILE |
$359.55 |
ABOVE IS JUST A SAMPLE .
CLICK ON ATV OR MOTORCYCLE TO BE TAKEN TO YOUR APPLICATION...
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APE is a leading supplier of high performance
and racing valves for motorcycles. APE stainless steel valves
are precision manufactured from aircraft quality Inconel based
stainless steel. This special material offers excellent resistance
to heat and distortion.
Honda
XR 400R (1996/1999) - TRX 400EX Quad (1999)
| PART NO. |
TYPE |
HEAD DIA. |
O.A. LENGTH |
DESCRIPTION |
| 98131 |
Exhaust |
29mm |
101mm |
Std size / 5.45 stem |
| 98132 |
Exhaust |
30mm |
101mm |
1mm O.S. / 5.45 stem |
| 98133 |
Intake |
33mm |
102.64mm |
Std size / 5.47 stem |
| 98134 |
Intake |
34mm |
102.64mm |
1mm O.S. / 5.47 stem |
ABOVE IS JUST A SAMPLE .
CLICK ON YOUR MAKE BELOW... |
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CLUTCH BASKETS, INNER HUBS AND PRESSURE
PLATES - Forged, CNC Machined, Teflon Coated
| HONDA CRF 450R 2002-2007 |
| Clutch Basket |
WPP3009 |
$205.00 |
| Cushion Kit |
W6186-8 |
$21.28 |
| Inner Hub |
WPP4002 |
$228.79 |
| Pressure Plate |
WPP5002 |
$139.00 |
ABOVE IS JUST A SAMPLE .
CLICK BELOW FOR THE COMPLETE LISTING.. |
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CRANKSHAFTS
AND CONNECTING RODS
| PART NO. |
TYPE |
APPLICATION |
PRICE |
| WPC143 |
Bottom end Kit |
HONDA CR250R ('92-'96) |
$204.97 |
| WPC133 |
Bottom end Kit |
YFM660F Raptor |
296.47 |
| WPC121 |
Bottom end Kit |
Suzuki RM125 (2001-03) |
164.97 |
| WPC131 |
Bottom end Kit |
Honda TRX400EX ATV ('99-'04) |
281.42 |
ABOVE IS JUST A SAMPLE . CLICK BELOW
FOR THE COMPLETE LISTING... |
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| The
Dyna FS for quads is one of the hottest new DYNA products. Direct
Plug in Performance. As used by winning pro racers worldwide.
Now available to you! Available with features that will let you
customize your quad, and make it the trickest, fastest, baddest
one around. |
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These high tech, top quality coils are
designed for maximum performance. They produce spark voltages
in excess of 30,000 volts and spark energies second to none.
DYNA Coils are made to replace stock coils. Choose from three
configurations and five variations of resistance for different
applications. DYNA Coils work with point ignitions, aftermarket
electronic ignitions and factory electronic ignitions. |
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Cam degreeing
wheels, top dead center tools, valve guide hones, stud removers
and more.
Click here to visit the ENGINE
BUILDING TOOLS page.
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All our cam chain
tensioners are manufactured on site from billet aluminum. If
we don't list a tensioner for your bike/quad please contact the
tech department at:
and we'll either
see if we have a manual tensioner for your application or make
one for you.
Scroll down for
a list of manual cam chain tensioners for quads and offroad bikes.
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CRF450 ADJUSTABLE CAM SPROCKETS.
2002-2006 CRF450R
2005-2007 CRF450X
2006-2008 TRX450R
#ACSCRF450 - $34.95
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Megan Oblonsky
BigBoreThumpers.com rider and
Team APE member.
CLick here to read her FAST TIMES column.
Updated 10/08
Photo: Tony Lamping
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| FREE BIG BORE THUMPERS DECALS |
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Drop us an email to receive a free Big Bore Thumpers.com
decal.
Send an email to: sales@bigborethumpers.com
Title the email "Sticker Request" and include the following
information:
| 1.
Your name and mailing address. |
| 2.
Year, make and model of your offroad bike/ATV. |
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HEAVY-DUTY
CAM CHAINS
Extra heavy duty cam chains
are recommended to help eliminate chain breakage which can result
in extensive engine damage. Tsubaki is the only true high performance
cam chain available. The Tsubaki engineers have worked with top
race mechanics world wide to produce the only cam chains that
will stand up to the rigorous demands of high performance race
machines. These same chains are equally at home in the stock
street bike, affording the owner the added protection of a high
performance chain at a price less than stock factory replacement
chains.
| Honda
XR250 1995 |
82RHM2010x102 |
$96.95 |
| Honda
CRF250 R/X '04-06 |
92RHM2015x104 |
104.50 |
| Honda
CRF450R '02-06 CRF450X '02-06 |
92RHM2015x112 |
112.43 |
| Suz.
DRZ400 2000 |
82RHM2010x128 |
121.21 |
| Yam
250 2001 |
92RHM2010x114 |
109.14 |
| YZF400
'98-02 YZ / WR426F '98-02 |
92RHM2010x120 |
113.76 |
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MANUAL
CAM CHAIN TENSIONERS
APE manual
cam chain tensioners are designed to replace the automatic and
hydraulic tensioners on high performance engines. The automatic
adjusters can back out when the throttle is closed suddenly at
high rpm. This allows the cams to go momentarely out of time,
and can result in bent valves and/or serious engine damage. Hydraulic
tensioners have a tendency to put too much tension on the chain
guide under high rpm/high oil pressure conditions, resulting
in premature wear. Both problems can be eliminated with the installation
of the APE manual tensioner.
No matter what
the engine does, the cam chain tension will remain constant.
AnAPE manual cam chain tensioner is a must for any kind of performance
riding. APE manual tensioners are CNC machined from billet alloy
to exact tolerances for perfect fit. All manual tensioners are
priced $51.65
If you do not
see your vehicle listed, contact the APE tech department tech@bigborethumpers.com to find out if we
have a manual tensioner for you.
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CAM
CHAIN TENSIONER APPLICATIONS
| YAMAHA |
SUZUKI |
KAWASAKI |
HONDA |
POLARIS PREDATOR |
HUSQVARNA |
PART # YT1000 FITS THESE FOUR-STROKE YAMAHA BIKES
YZ250F '01-04
WR250F '01-04
YZ400F '98-99
WR400F '98-00
YZ426 '00-02
WR426 '01-02
YZ450F '03-04
PART # YT1000 FITS THESE FOUR-STROKE
QUADS
YFM250 TIMBERWOLF '92-01
YFB250 BEAR TRACKER '99-02
YFZ450 '04 |
DRZ400 - #ST1300GX
LTZ400 -
#ST1300GX |
KLX400 - #ST1300GX
KFX400 -
#ST1300GX
KLR600 -
#KT1050
KLX650 -
#KT1050 |
CRF450 - #ST1300GX
CRF250 -
#ST1300GX |
#HT600RR |
TE610/SM610
'06-'08
#HTE610 |
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