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WR250R/X-280 - ThumperRacing
https://www.thumperracing.net/index.php?route=product/product&product_id=97
Option One: $365 We provide you the piston and top end gaskets, you have your stock cylinder overbored and replated to match the 280 piston. Option Two: $600 Send in your cylinder, we will complete all the appropriate work and send you back the kit complete and ready to install. Option Three: $900 includes core deposit.
YZF/WR250-290 BBK - ThumperRacing
https://www.thumperracing.net/index.php?route=product/product&product_id=96
Yamaha YZF WR 250 290 Big Bore Kit. Call Us: 775.309.4956 . Home; Articles; Dealers; Log In; Account; Contact; Basket . Home » YZF/WR250-290 BBK . Browse Products. Cylinder Services Crank Services ... The Thumper Racing 290 kit is the best of both worlds, it gives power and performance with a great bottom end boost. The 290 is a torque motor ...
ThumperRacing
http://thumperracing.net/
250 EXC-RFS; 250XCF-W/SXF; 400EXC/MXC/SX-450SXF; KTM 78mm RFS crank; SHIPPING. Welcome to Thumper Racing . WE ARE NO LONGER TAKING ORDERS HERE . It is with a heavy heart we have made the decision to close Thumper Racing for medical reasons. Thumper's last day open is February 19, 2021. ... Built Motors will support Thumper Racing big bore kits ...
Big Bore Kits - ThumperRacing
https://www.thumperracing.net/index.php?route=product/category&path=37
© 2008-2022 All Rights Reserved · Thumper Racing · 775.309.4956 · Sitemap 1292 Industrial Court Unit A · Gardnerville, NV 89410 +motiv powered+motiv powered
WR250R/X - thumperracing.net
http://thumperracing.net/index.php?route=product/category&path=37_43_288_106
Yamaha WR 250 R X. © 2008-2022 All Rights Reserved · Thumper Racing · 775.309.4956 · Sitemap 1292 Industrial Court Unit A · Gardnerville, NV 89410 +motiv powered ...
Home - ThumperTalk
https://thumpertalk.com/forums/topic/259026-wr250f-big-bore-kit/
XR250R to 300 - ThumperRacing
https://www.thumperracing.net/index.php?route=product/product&product_id=70
Price: $434.00. Our engine kit takes the XR250R all the way to 300cc. This motor really rips!!! We squeezed an 80mm piston to make the motor strong of the bottom. Combine the basic motor kit with our head porting service, a 34mm flatslide carb, XR600/400 air boot and filter, an exhaust system and you've got a super 300.
XR250R to 280 - ThumperRacing
https://www.thumperracing.net/index.php?route=product/product&product_id=72
Price: $231.00. Stock, the XR250 is a proven trail bike. With upgraded suspension, more power, and quicker reponse, it bridges the gap into a serious raceable motorcycle. This kit uses a 77mm piston. This is as big as it gets allowing one overbore. This noticeably improves the overall power output from bottom to top.
Thumper Racing 320 big bore for the XR250? - DirtRider
https://dirtrider.net/forums3/threads/thumper-racing-320-big-bore-for-the-xr250.40360/
The 280 kit is a no-brainer, just a big bore piston. I keep a spare clutch and springs on hand - even the 280 will slip the clutch when power shifting on pavement, so the thing is taking some add'l abuse in normal riding. The 320 kit is mucho dolaras and involves stroking and boring. Then you get into the carb/cam upgrades.
Frank's Yamaha WR250R Dyno Tuning Adventure - Dual Sport …
https://dualsportalchemy.com/franks-yamaha-wr250r-dyno-tuning-adventure
Our conversation continues toward me eventually installing a Thumper Racing 280 big bore kit. He tells me he’s never heard of Thumper Racing. I look down into the glass display case between us and, bigger than life, a custom part of some sort with the words Thumper Racing engraved into it. Keep in mind that this is not only the tech, he also ...
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