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Athena Big Bore Kit - 435cc

Athena Big Bore Kit - 435cc - Main
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Big Bore Kit
Athena Big Bore Kit - 435cc - Main
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Retail: $799.99
$719.99
You Save: $80.00 (10%)
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Product Description

  • The Athena 435cc Big Bore kit is the missing source for increasing your motorcycles raw power.
  • The included 435cc cylinder on the Athena Big Bore kit is constructed out of aluminum with a galvanic coating to increase the durability.
  • The water jets have been widened for a higher flow rate, keeping the cylinder cool.
  • Athena built a reliable forged piston that has been molybdenum coated for high performance use and extended wear life.
  • The Athena Big Bore kit includes a specially designed gasket kit to accommodate the big bore features.
  • Another great feature of the Athena Big Bore kit is that it bolts on with no machining needed, and includes easy-to-follow step-by-step installation instructions.
  • The Athena 435cc Big Bore Kit includes: cylinder, piston, ring(s), pin, clips, top end big bore gasket kit.

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“ Bought the Athena kit as a base to start a stroker build on my '07 LTZ 400. ”
4bz1d1a Location: Florida
“ this was a rlly easy instaling it. ”
yergeau88racing Location: New Carlisle, IN
1-3 of 3
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Verified Purchaser
Location: Pomona NY
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Location: Florida
Athena Kit...
Bought the Athena kit as a base to start a stroker build on my '07 LTZ 400. The Athena kits are really high quality, and have been around a long time. You will not be disappointed..
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Location: New Carlisle, IN
Very nice
this was a rlly easy instaling it. the performance is rlly nice
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“ Does this kit come with jetting recommendations?... ”
wheelieprone Location: Owensboro, KY
1-5 of 5
crawford Over 3 years ago
In the 2009 book this kit is listed as 569.99 is this the right price or is it 719.99.?
MotoSport Staff Expert
Over 3 years ago Location: Motosport
Yes the prices have gone up to $719.99 prices are subject to change at any time. Which when the vendors change there prices are prices also do have to change. Feel free to contact us regarding the price to confirm the correct price for your year, make and model
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wheelieprone Over 4 years ago Location: Owensboro, KY
Does this kit come with jetting recommendations?
MotoSport Staff
Over 4 years ago Location: P+RTLAND
It should in the instructions but depending on what you have already done tone your bike I would recommend contacting a local shop for jetting specs.
Over 4 years ago
Yes, you will have to re-jet. The need for fuel will increase.
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rmyers Over 4 years ago Location: los angeles
There are 2 base gaskets in the kit. Which gasket should I use to achieve the 12.3 to 1 comp. ratio?
Top 10 Contributor
Over 4 years ago Location: Tualatin
I know when I install the Athena bigbore kit on a YZ125 it came with three base gaskets. Athena had in the instructions a piston to head clearance. measure both gaskets before installing any of them, what I did was go with the thin one then did the measurements as instructed and found that it was to tight by measuring before installing you will know once you measure if you need to swap one add both, I had to add a combination of the three gaskets to get the proper clearance.
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kfx400racer Over 4 years ago Location: Arkansas
If i buy this kit would i need to get a bigger carb or radiator or what other mods whould i need?
MotoSport Staff
Over 4 years ago Location: Portland, OR
This kit is pretty much a direct bolt on, so a larger carb and radiator isn't needed. You will have to dial in the jetting a little bit after installing this set up but thats about it. Down the road you can always pick up the Stage 2 Cams and then you'd have a solid set up with good mid and top range power.
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randersen Over 4 years ago
How much horsepower gain and top speed with this have on a 2003 suzuki ztz400?
MotoSport Staff Expert
Over 4 years ago
this will not give you a lot more horse power but it will give you alot more torque. this will give you mostly bottom and midrange kick.
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