Unlock your dirt bike's hidden potential with the power producing and durable Cylinder Works big bore kit. No need to waste your time and money on getting your factory cylinder bored out because the Cylinder Works cylinder is stronger and more reliable. Best part about this cylinder is that it mounts directly to the factory crankcase and head. The piston and rings that come with the Cylinder Works big bore kit are reliable for any motocross race. Even down to the gaskets Cylinder Works employs high quality gasket materials for reliability. Take your 450cc engine and add 3mm for a big bore 478cc with the Cylinder Works kit. The Cylinder Works big bore kit includes: big bore cylinder, big bore piston, piston pin, piston pin rings, gasket kit. Note: to achieve optimum performance re-jet the carburetor with the available jet kits.

Average Customer Rating:

out of

Rating Snapshot (2 reviews)

5 stars

4 stars

3 stars

2 stars

1 star

1 of 2(50%)reviewers would recommend this product to a friend.

Customer Questions & Answers:

5 Questions | 8 Answers

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Customer Reviews for Cylinder Works Big Bore Kit - 478Cc

Review 1 for Cylinder Works Big Bore Kit - 478Cc

Overall:

5 out of 5

Ease of Installation:

5 out of 5

Style:

5 out of 5

Performance:

5 out of 5

Power:

5 out of 5

yzbigbore

Location:Rigby, Id

Top 1000 Contributor
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Top 1000 Contributor

May 13, 2010

"I installed this on my 06 yz450f it looks just like the OEM cylinder i did not install the piston instead i ordered a high compression piston. This bike runs like i added another 10 HP. I have been riding it for 3 months with no problems. hill climbing you can't run out of power. power is strong all the way through i would recommend this product."

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Review 2 for Cylinder Works Big Bore Kit - 478Cc

Overall:

3 out of 5

Ease of Installation:

5 out of 5

Style:

2 out of 5

Durability:

1 out of 5

Performance:

5 out of 5

Power:

4 out of 5

hayder

Location:Phoenix, AZ

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Top 250 Contributor

It's your call

March 8, 2010

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"Had some prblms with it.. to start off i have built over 15 yfz motors with no prblms so it wasn't me.. but back to the product. First problem I had was the piston pin clip came out and put a gouge in the cylinder so i went and got another cylinder and rings and clips and maybe had 10 hours on it and I broke a valve which went through my piston and as i tore it all apart again I also noticed that the inside of the cylinder had a crack in it. It could have been from the valve but i dont think so because the valve went through the piston and ive read about the cylinders cracking on other people too. so just thought I'd say if you wanna risk it go for it had lots of power but if you want something that will last i would go OEM. thats where I'm headed now."

1 of 1 people found this review helpful.

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