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KTM PowerParts SXS Big Bore Kit
KTM PowerParts SXS Big Bore Kit

$ 699.99 - $ 959.99

Description See Also: 5 Reviews 3 Questions Fitment Part Numbers
Item #KPP00BP

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5 Reviews
4.8 out of 5 stars
5 Star   4 4 Star   1 3 Star   0 2 Star   0 1 Star   0
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All Reviews
Verified Purchaser
Scottsburg IN
Durability 4/5 Ease of Installation 4/5 Performance 5/5 Power 5/5 Style 4/5
Good product

Everything you'll need is in this kit but I did have to put a 115 main jet in the carb to get it to run right in the mid range

Verified Purchaser
Walls, MS
Durability 5/5 Ease of Installation 3/5 Performance 5/5 Power 5/5
Much more power!

I seized up my 250xc and it was only like $80 more dollars to buy the big bore kit as opposed to buying a new top end and new cylinder. I wish it would have came with instructions as you have to put together the cylinder and power valve components yourself but at least theres good ol' youtube! My bike totes my 250lb butt around much better now. Hey theres a big log in the trail, just a blip of the throttle and thats that.

Verified Purchaser
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5
105 kit

These lil 105s rip!

Verified Purchaser
Durability 5/5 Ease of Installation 5/5 Performance 5/5 Power 5/5 Style 5/5

Had everything but the wrist pin bearing in the kit. That was the only flaw I found in the whole deal. No biggie Motosport had me one in two days. I also would recommend a nihilo deck height tool. Mine took 3 of 4 supplied base gaskets. Cheap insurance

Durability 5/5 Ease of Installation 3/5 Performance 5/5 Power 4/5 Style 4/5


3 Questions
Answered:   3
Not Yet:   0
Q: I have a 2017 250xcw, the kit I'm looking at for $919.99 says its an SXS, is that right or is it a 300xcw equivalent? I want the SXS so I'm hoping that's right. Thanks, Dan
9 days 20 hours ago
Dan Gearhead
Top 25
9 days 20 hours ago
A: This kit is designed to convert your 250 XC/XC-W to a 300 XC/XC-W for the open class, also called E3 class. This is an KTM Powerparts SXS engine kit.
Q: Do have a big bore or high compression kit for a 2006 KTM 105sx ?
Over 5 months ago
Top 25
Over 5 months ago
A: I am sorry to say we will not have a big bore kit for that bike.
Q: I just need a replacement top end for this kit
Over 9 months ago
I already have this kit installed on my bike. But, it's time to do a top end replacement. Where can I buy the replacement piston/rings, and gasket kit? Thanks
Top 25
Over 9 months ago
A: Please give us a call at 888-676-8853 and we can get an order together for you. Please have the piston size ready for us.

See all bikes that this part fits...

See Fitments
# Part Numbers
Product Variant Manufacturer Part #
300cc SXS12300100
300cc SXS17300500
150cc SXS.16.150.000
300cc SXS.12.300.000
300cc SXS.14.300.000
105cc SXS.13.105.000