Thumper Racing 300cc Kit

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XR250R to 300 - ThumperRacing

https://www.thumperracing.net/index.php?route=product/product&product_id=70

In Stock 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.

CRF250-300 Big Bore Kit - ThumperRacing

https://www.thumperracing.net/index.php?route=product/product&product_id=262

We built the ultimate 250 big bore kit. For 2010 the stock cast aluminum cylinder is good for a 2mm overbore (264cc) any larger and you risk cracking a cylinder. For the 300 kit Thumper went back to the drawing board using our Cool Flow sleeve design which increases the water to cylinder contact area by 25% in this kit.

ThumperRacing

http://thumperracing.net/

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TRX300EX/4X4 - ThumperRacing

https://www.thumperracing.net/index.php?route=product/product&product_id=85

We increased the bore to 76mm and upped the compression to 11 to 1. You will love the extra power! With a change in gaskets and jetting, this kit will also work for the Honda TRX300 4x4. Please select which model you have in the options when purchasing the kit for to insure you receive the correct gaskets and jet kit.

Big Bore Kits - ThumperRacing

https://www.thumperracing.net/index.php?route=product/category&path=37

TPR Racing 74mm 300cc Big Bore Kit for Majesty 250 …

https://www.amazon.com/TPR-Racing-300cc-Yamaha-Majesty/dp/B01N5Y4WLV

$431.25 TPR Racing 74mm Big Bore Kit that will increase the displacement of a Majesty 250 Linhai VOG 260 to 300cc High quality big bore kit that will give you the best bang for the bucks performance! *You will NOT need to modify your engine case to accommodate this larger cylinder. Bolt On and Go!

Thumper Racing 300cc XR - XR250R & XR400R - ThumperTalk

https://thumpertalk.com/forums/topic/875070-thumper-racing-300cc-xr/

I keep seeing people talking about this Thumper Racing 300cc XR kit. But I can not find it. Does anyone have a link. Thanks, Jump to content. XR250R & XR400R; Search. Search In Everywhere; Topics; This Forum; ... Thumper Racing 300cc XR Facebook; Twitter; Youtube; Instagram; Pinterest;

Thumper Racing Kit - Abused | ATV Rider

https://www.atvrider.com/thumper-racing-kit-abused/

Since the '06 Rincon has EFI (electric fuel injection), the Thumper kit contains a Moose Racing Power Commander system that plugs into your laptop for the purpose of reprogramming the mapping and fine-tuning your fuel injection. No reason to wig out: Hazel claims this system doesn't require a rocket scientist to dial in.

THUMPER RACING KLX 340 TEST-JULY 8 - Dirt Bike Magazine

https://dirtbikemagazine.com/thumper-racing-klx-340-test-july-8/

From The July Issue Of Dirt Bike Magazine GO BIG, YOUNG MAN! Just as the KLX benefitted from a jump from 250cc to 300cc, more displacement equals more bark. Thumper Racing bored the Nikasil cylinder to accept a sleeve and an 84mm piston, bumping displacement to 340cc and dropping compression to 10.5:1 for the kit.

Honda Big Bore Kits - Kustom Kraft Performance

https://kustom-kraft.com/honda-big-bore-kits/

Honda Big Bore Kits – 2 Stroke Off Road CR 80 1986-2002 90cc $329 CR 80 1986-2002 105cc $419 CR 85 2003-2004 96cc $395 CR 85 2003-2006 105cc $419 CR 125 1990-2006 134cc $449 CR 250 1992-1996 262cc $525 CR 250 1997-2004 270cc $525 CR 250 1978-1980 290cc $525 CR 250 1986-1991 310cc $525 Honda Big Bore Kits – 4 Stroke CRF 100 2004-2006 120cc $309

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