GYTR High Compression Piston

$198.49 - $219.99
5.00 out of 5 stars
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GYTR High Compression Piston
GYTR High Compression Piston
  • Description
  • Reviews (2)
  • Q&A (8)
  • Fitment

The GYTR High Compression Piston Kit provides a performance boost throughout the RPM range while maintaining a high level of durability.

  • Forged aluminum construction that is CNC machined to exact tolerances for performance and durability.
  • Machined valve pockets provide additional valve clearance when used with higher lift camshafts.
  • The kit includes piston, piston rings, piston pin, and clips (uses stock replacements).
  • Notes: Requires use of minimum 100-octane racing fuel. This accessory may be restricted to closed-course use. This performance accessory does not meet California standards for off-road recreational vehicle usage regardless of model year. IMPORTANT: GYTR Oil Sprayer (sold separately) is required for GYTR High Compression Piston Kit.
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Overall 5 out of 5 stars
Verified Purchaser
Best Purchase Ever

best performance part for my quad

Overall 5 out of 5 stars
Ease of Installation
Location: Mill Creek WV
A Must Have

Just put this in my 2009 YZ250F an right after I got the bike back together and running I could tell a huge difference in the power. It almost threw me off the back because I wasn't expecting my bike to accelerate that much faster. The only down side is the higher cost of the gasoline you have to run, but if your serious about racing this is a must have!

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Total Questions (8)
Questions with answers:
Questions without answers:
Jensen Location: Norway
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Johnson Over 5 months ago
Would I need to get a programmer to run this piston in a yfz 450r?
MotoSport Staff Expert
Over 5 months ago
Most likely for optimum performance you will need to reprogram your YFZ450R when installing the GYTR High Compression Piston.
Yamy250f Over 9 months ago
Would it be bad to run higher than 100 octane fuel with this piston or do I need to run 100?
I currently use 110 octane race fuel for the setup I have now and it is easy for me to get. Would I have to switch to 100 octane?
Expert MotoSport Staff
Over 9 months ago
The GYTR High Compression Piston Requires use of minimum 100-octane racing fuel.
BigTRanch Over 11 months ago Location: Austr
Will this piston fit a 2014 YZ450?
MotoSport Staff Expert
Over 11 months ago
No, unfortunately we do not have the GYTR High Compression Piston for your 2014 Yamaha YZ450F at this time.
Jensen 1 year 2 months ago Location: Norway
Can i use 98octane?
Can i use 98octane insted of 100octane? And how much hp can I expect to gain on my 2013 yz250f?
Top 1 Contributor Top 50 Contributor
1 year 1 month ago
It is always recommended to use Premium fuel with a GYTR or any other brand High Compression Piston. Depending on the compression ratio and other factors, you may need to use a mix of race gas to eliminate detonation.

As a general rule of thumb, a higher compression piston will give you more low end power in trade for higher RPM power.
joe800 1 year 3 months ago
Do i need to install new cams with the installation of this product?
MotoSport Staff Expert Top 1 Contributor
1 year 3 months ago
No, you don't have to run aftermarket camshafts.
Zach3445 1 year 10 months ago Location: O'Neill, NE 68763, USA
Dont these require high compression Gytr Gaskets?
I need to replace the gaskets around my cylinder while I'm In my motor and I Thought these required a high compression GYTR gasket set and i can not seem to find it on the site. I cant find any gaskets that fit the stock Bore. they are all for big bore kits. Im shopping for my 2009 YFZ450R fuel injected model.
Expert MotoSport Staff
1 year 10 months ago Location: Portland, OR, USA
You should be able to use the OEM gasket kit or any aftermarket gasket kit with this piston. I cannot find anything on this kit that says it would require a specific gasket kit for the higher compression.
Tupadre 2 years 5 months ago
Could I run 91 octane gas?
MotoSport Staff
2 years 5 months ago Location: Portland, OR, USA
Yamaha recommends running 100 octane fuel with this piston kit. You can mix a 110 race fuel 50/50 with your 91 octane and be okay. Basically compression ratios between 12.5 and 13.1 will start to require 100 octane. If it is not used then your motor can start to pre-detonate during the compression stroke which can cause pre-mature engine wear, and can lead to piston failure.
absolutbaikel 2 years 7 months ago Location: Chile
What happens if I use regular 97 octane gas with this piston kit in my yfz450r?
GAS cuestion
MotoSport Staff
2 years 7 months ago Location: Portland, OR, USA
Your YFZ450R with this piston kit installed should run just fine with 97 octane fuel.
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