434cc Big Bore Cylinder Piston Kit for Arctic Cat 400 Kawasaki KFX400 KLX400 Suzuki DRZ400 LTZ400 11210-29F20-0F0 11005-S007

Was concerned with the quality before order since it was only $107. Saw a lot of good reviews and only 2 talking about the piston exploding. I believe if you gap the rings properly all will be fine. They come almost touching. Everything came very well packaged. Better than I expected. Have the kit installed and bike almost ready to run. Will update after the first few rides. Update: took it on two long rides and it seems to be doing great. No sealing issues or coolant leaks. Definitely has more low end torque. Will bring the front off the ground all the way through 3rd. Time will tell how well it holds up. For $107 go for it, just be sure to gap your rings right.

So far I am very impressed. This kit made a huge difference in punch in all the rpm range. My kit was very easy to install. I used a page with a title like “Lazy big bore install”. I honestly had nothing to lose because my bike was burning tremendous amounts of oil before the install. I spent lots of time doing research about the other name brand kits. The same kit selling for 600 now sold for 180 back 10 years ago. I rolled the dice and to be honest I am so please. Would absolutely buy again. I did not install the compression release on my SM but after trying to kick it without that I feel like I am going to install it.

Used this on my drz worked great the biggest issue I ran into is the piston wrist pin absolutely would not slide in without beating it in with a hammer so I ended up reusing my old one that slid right in, piston casting does not seem that great but it works

Fit just like oem have about 10 hours with it installed good bump in power and well made and cheap

Bought and installed this kit in January. I did upgrade the piston to a Namura, just because and it all fit perfectly. Seven months and many miles later, it's still going strong and uses no oil, to speak of. Very happy, especially for the $$$.

Wrist pun came bent and didn’t fit right. Base gasket didn’t fit no matter how hard I tried. Cylinder and piston including wrist pin look to be manufactured decent

Installed and broken in. Everything measured out. It was missing the circlips, but they sent an entire replacement piston kit to compensate. Bike runs flat out with good compression so far. I'll update if anything changes.

I personally don't trust the piston to hold up to my rough riding style but the cylinder looks to be really good. Can't beat $150 for a bore kit that comes with gaskets piston and the cylinder.

gasket kit was very hard to put on on the block. no instructions found in or on the website for the install. oil rings were the most difficult to put in place but enough fiddling got em in. other resources did help with the install. all in all good buy for the price and looking forward to finish the break in to go for a proper ride.

Put this in a 04 ltz 400. The old top end had low compression so I decided to go with this big bore kit. So far so good have about 30 hours on it since instal. Quad runs great and has lots of power.

Although initial appearance looks very good when installed would not seal and leaked between cylinder and block also between head and cylinder head was resurfaced so it's 100% straight so I torqued the head bolts down to 44 ft lb and got the coolant leak to somewhat stop seems to be fixed now although bolts are 10 lb over spec