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What's new New media New media comments Latest activity. Media New media New comments. Log-In Register. What's new. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. HM CRX Latest: Ricky Today at AM. Honda Mini. Dirt Bike Brands - Other.

Would YOU run these graphics? Latest: Okiewan Yesterday at PM. Pro Motocross announces nine-race schedule: begins Aug. Vintage Motorcycle Rebuilds. Start 'Em Young Latest: Divouneh Wednesday at PM. New Member? Go here first. Who to Ride With, Where to Ride. Getting into the sport Latest: Okiewan Jul 9, CR80 Big Bore kit Questions. Thread starter nsxxtreme Start date Jun 4, I bought the bike for a Girlfriend's son a few years back who eventually outgrew the bike.

I then freshened up the engine with a cc big bore kit, new clutch, heavy duty clutch springs and gave it to another friend to ride - I'm 6'2" lbs and far too big to ride this bike on a regular basis. She rode it for all of 20 minutes before parking it for three years and then returning it to me.

This little bike rips! Make Honda. Model CR. I purchased this bike this past summer for my son, who was a beginning rider. Although awhen I bought the bike, it was as new as when it left the showroom floor. It was completely original except for the Renthal handlebar setuphad barely been ridden and clearly never saw any mud. On the sides of the frame where your riding boots normally rub, the paint had no visible wear. The bike was brand new. Since then, my son has ridden the bike on a small track that I built in my back yard for a single season.

It still has never seen any mud. The CR85 Big Wheel is a full-blown motocross bike, only in a smaller package. The power is awesome and the suspension is great. The fork oil and seals have been changed, along with new Factory Connection springs this summer. The rear shock seals and oil have been changed as well.

The top end was professionally done about 20 hours ago with a new Wiseco piston and ring. The jug has a cast iron sleeved cylinder original bore diameteras opposed to the Nickasil alloy generally found in these bikes. I installed a set of Boysen Reeds and a carburetor spacer kit to help improve the bottom end. It also has a new Pro Circuit Platinum pipe and silencer setup that improved the performance from the mid to upper range.

The sprockets have been upgraded, along with a quality Renthal O-Ring chain. Other upgrades include an oversized Mishimoto radiator and silicone hoses. The Twin-Air air filter was cleaned and oiled regularly, along with the gear oil Lucas Synthetic. It still has all of the original plastic and even the factory decals and labeling throughout.

cr80 big bore kit

It comes with all of the factory original parts, including the complete exhaust setup like newfork springs and the radiator like new and hoses. I do not have the title, but will provide a bill of sale. Local sales only. I'm not offering, nor will I even consider shipping this vehicle. It must be picked up in person. Check out the pictures and email any questions.

Make Triumph. I promise you will not find a more beautiful, well maintained, stronger running bike out there.Here at MotoSport you'll find all the dirt bike parts to suit a wide variety of bikes and riding styles.

We carry a large selection of dirt bike exhausts to give you the option of a race ready system like the Yoshimura RS-4 complete system or the more modest FMF Powercore 4 complete exhaust system for your mini. Not only do we carry the parts that give your dirt bike a performance boost, we also carry the parts to keep your ride feeling smooth with All Balls bearings. Sometimes the parts that keep your bike riding its best come directly from the manufacturer. At MotoSport you can find the OEM dirt bike parts to complete almost any job, from a basic fender bolt to a complete new top end.

After you get your dirt bike set up check out our selection of the hottest dirt bike gear. You can easily find the right gear that matches your style and needs. We stock the same gear the pros wear from head to toe.

Riding gear isn't just about looking good. Staying protected is important. Make sure your time spend on the track is as safe as possible with our selection of protective gear. If your knees have seen better days or if you just want to keep them healthy set yourself up with a set of Asterisk Cell Knee Braces for world-class knee protection.

You've got more choices than ever when it comes to where to buy, and we always aim to give you the best shopping experience in the industry.

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Cr80 Big Bore Motorcycles for sale

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2000 cr80r with fmf pipes and 105cc big bore kit

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New Used 5. Please provide a valid price range. Item Location see all Item Location. Default filter applied. Canada Only. North America. Show only see all Show only.Hello guys, i'm trying to get my wifes bike ready for california. I bought it off craigslist. It's a CR80R and i just recently learned when i used a micrometer, that it's a big bore kit. I also don't know what engines are interchangable. One person mentioned using a cr85 piston on his bored cr80, i do know that the has the same engine as the Please help i am stressing out hard.

cr80 big bore kit

I have a Cr80 Will this kit im linking work with or fit on my bike? It has an overbored cylinder and when i guaged it with a micro the piston was I hear that the engines are all the same for through or 5. Though mines bored over, with a 47mm stroke, i think that piston has the same but im not sure.

I actually wanna just get this kit A dial bore gauge and a set of micrometers is best for measuring. Measure the bore in at least three spots from bottom to top, to determine the amount of taper.

Surprising how many bores are not straight. Then you can figure in, say. Digital or slide calipers are not very accurate for precise cylinder bore measuring. Would suck to just throw some random piston in it, and see it squeak to a halt. But it doesn't come with cylinder head Vital MX - Motocross.

I'm stressing out! Related: Edit Tags Done.

cr80 big bore kit

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L.A. SLEEVE Big Bore Kit 105cc - CR80-105

Social Scoop 1. Most Popular. A New Chapter - Weston Peick 4.In particular, racing kits consist of lighter pistons with a flat head, special portings, exhaust bridge, and a new cylinder head designed to increase the compression ratio and improve internal combustion.

For some models Athena also supplies special long stroke racing kits complete with crankshafts and reinforced connecting rods. Note: All Athena products which are manufactured with higher displacement and power than those permitted by law of the country where the end user lives are intended solely for competition-sports usage.

Wash hands after handling. For more information, go to www. Athena Athena Big Bore Kit. Rating: 4. It appears you may have javascript turned off in your web browser, or are using a browser that does not support javascript.

You must enable javascript to use our site. For questions call us at Select your bike to see if this big bore kit fits.

cr80 big bore kit

Add to Cart. Similar Items. Cylinder Works. Big Bore Stroker Kit. Factory Cylinder Kit. The Athena Big Bore kit is the missing source for increasing your motorcycles raw power. The included cylinder is constructed out of aluminum with a nickel-carbide coating to increase durability.

The water jets have been widened for a higher flow rate, keeping the cylinder cool. Athena built a reliable cast piston that has been molybdenum-coated for high performance use and extended wear life. Includes a specially designed gasket kit to accommodate the big bore features.

Each kit also includes easy-to-follow step-by-step installation instructions. Notes: Some kits will require case boring. Kits for 4-stroke applications do NOT include cylinder head. Image is for display purposes ONLY and may not represent actual product.

Read More. Find More.Want to increase the overall performance of your engine? Nothing else is as important, since the boost in displacement is tied to your torque performance. And for that, you need big bore kits. These big bore kits are utterly reliable, and for great low end you get a huge boost in torque.

Big Bore Kits

And at the same time, the power is also enhanced all through the whole power band. This is the most effective way to boost the engine performance. This improvement is available for 2-stroke and 4-stroke motorcycles, and for ATVs.

Kustom Kraft has big bore kits for all the popular brands. All you need to do is to send Kustom Kraft the cylinder and head plus the power valves. Kustom Kraft will do the rest, including boring, sleeving, or replating the cylinder to the new size. Modifications will be made to the power valves, should they be necessary for the valves to work properly with the bigger bore size. In some cases, the cylinder head will have to be re-chambered to the right volume and compression ratio.

All you need to do is to determine the big bore kit you need. Carefully pack it, and then send the package to us. We do have a wide range of big bore kits, including for 2-stroke off road motorcycles, 4-stroke off road motorcycles, 2-stroke ATVs, and 4-stroke ATVs.

Home Big Bore Kits Want to increase the overall performance of your engine? About the same price ranges for the motorcycle big bore kits and the ATV big bore kits can be found for the Suzuki and the Yamaha models. What more do you need?

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