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Athena Big Bore Stroker Kit
Athena Big Bore Stroker Kit

$797.99 $938.95
15% Off - Save $140.96

Description See Also: 2 Reviews 2 Questions Fitment Part Numbers
Item #ATH0003

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2 Reviews

3 out of 5 stars
  •   1 reviews
  •   0 reviews
  •   0 reviews
  •   0 reviews
  •   1 reviews

All Reviews

Dave

Verified Purchaser
1 year 6 months ago Indiana
1 out of 5 stars
Durability
3/5
Ease of Installation
1/5
Performance
5/5
Power
5/5
Style
1/5
Good kit

Yamaha 112 stroker kit. Doesnt come with all gaskets, crank bearings and instructions suck. The jetting / carburetor recommendations are way off. Parts are good quality but if you are not good at tuning 2 strokes... have someone that does know how to tune do it. Athena needs to rename this kit to half kit because its not a full kit of everything you need.

5150

Verified Purchaser
Over 5 years ago
5 out of 5 stars
Ease of Installation
3/5
Performance
5/5
Power
5/5
Style
3/5
112 Big Bore stroker kit

This kit was pretty straight forward to install. This kit states no machining necessary but you will need to shave the case in order to clear the piston. Also it states all gaskets are included for the job, that not accurate, it comes with head and cylinder gaskets only.

Took the bike out for the first time yesterday and it is a rocket. It makes allot more bottom end and the power band is incredible. Used Athena's recommendation for the jetting and it was pretty close just need a little fine tuning.

I would recommend this for advanced riders; the yz is fast out of the box and even faster with this mod

Time will tell on durability.

2 Questions

  • Answered:   2
  • Not Yet:   0

Question asked by Nahuel

Question: Guys, I've bought this kit and ALL the recommended gaskets, bearings, jets etc, but on the instruction manual Athena recommends to replace the gas valve:  4.0mm, code Kehin N502-11E01 (valve OEM 3.0mm), and I can't find it anywhere.... Please HELP
Question asked Over 11 months ago
Question answered by DaveGearhead
User's contributor status: Top 1
Question answered Over 11 months ago
Answer: I am sorry, but we do not offer the product that you are looking for. I would suggest contacting Sudco @ (310) 637-8330. They may have the valves you are looking for. Best of luck.

Question asked by Torquenut

Question: Have a 2016 Haoin Hawk 250cc
Question asked 2 years 8 months ago
looking to see if this will fit the Hawk 250cc also what would be the increase in horsepower
Question answered by Paul
User's contributor status: Top 10
Question answered 2 years 8 months ago
Answer: I regret that Haojin does not provide us with parts lists for their motorcycles. We don't if this might fit your 2016 Haojin Hawk 250cc. We must suggest that you check with your local Haojin dealership's service department.

Fitment

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# Part Numbers

Product Variant Manufacturer Part #
Athena Big Bore Stroker Kit P400485100039