Awesome
By
Brad M.
on
Verified Purchaser
Awesome kit. Son has put 100 hours on this kit so far with no issues.
Fits:
$175.03 – $1348.16
Product Note:
Specification | Details |
---|---|
Bore | Varies (make selection above) |
Compression Ratio | Varies (make selection above) |
Country of Origin | Italy |
Displacement | Varies (make selection above) |
Material | Varies (make selection above) |
Size Over Standard | Varies (make selection above) |
Fitment is guaranteed or your money back plus free return shipping.
Don’t waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.
By
Brad M.
on
Verified Purchaser
Awesome kit. Son has put 100 hours on this kit so far with no issues.
By
Mike Z.
on
Verified Purchaser
I had no problem with this kit...big bore kit works good....got mine all broke in and it runs really good...glad I got it...
By
Ripper
on
Verified Purchaser
Bolts right on. No grinding on crankcase necessary for 1999 yz125. Runs great
By
Thomasj
on
Verified Purchaser
Everything was good until I tried putting the power valves in. The valves didn’t fit correctly so I had to file them down to make them seat all the way in correctly. Other than that it all seems good.
By
Ethan S.
on
Verified Purchaser
Bought the big bore kit for a 2006 klx110, very high quality kit comes with everything you need. The kit is the best bang for your buck. Really wakes the bike up.
By
Jason A.
on
Verified Purchaser
Made my ltz400 a missile.
How many stars would you give this product? Write a review.
By Anon.
There's no machining required whatsoever to fit these cylinder kits to any machine you select from our fit guide, including all Honda CRF150R models. Just bolt all the included parts in place of the stock items and you're all set.
By Anon.
Yes, this kit is offered for that 1997 YZ125. However, you would need to use a pipe from a 1999-2004 YZ125 due to the way the cylinder in this kit is made. It will only work with a pipe from that 1999-2004 YZ125. Other than that, you would just need to machine the cases as shown in the included installation instructions to provide enough clearance for the big bore piston.
By Kuntry
Is this bolt on and rip? Can i throw these on a stock banshee without having my case milled?
Yes, the kit can be installed on the Banshee engine without any machine work being done.
By Anon.
Yes, there is a 80cc kit offered for that 2007 KX65.
By Bold
Yes, the kit for that 2000 YZ125 would require you to machine the cases in order to provide enough clearance for the piston.
By Anon.
You will need to have the cases machined in order to allow the clearance needed for the larger piston.
By Anon.
Yes, you would need machine the cases in order to allow the clearance needed for installation of this kit on the 2001 YZ125. The included installation instructions clearly show how much and where to took out the material.
By Anon.
There is not case machining that needs to be done in order to install this kit on the Banshee.
By Anon.
Yes, this would be a bolt on kit for that 2006 KFX400. No case machining required.
By Kevlar
Also does the crank work with stock bearing or do I need specific crank bearings?
Yes, you would need to machine the cases to allow proper clearance. Yes, the crank included would work with the stock style bearings.
By Chaz
Yes, the kit for the 2003 KX125 would include having to open up the cases in order to allow fitment of the new components.
By Anon.
How much would it cost
As long as that is the bike that you choose before adding the kit to your cart, it would be a fit.
By Turbo
So long as you choose that 1999 Yamaha YZ125 when adding to your cart and you have a stock stroke length crank installed, you should have no fitment issues.
By Johnny
Hi guys I'm just curious to know if this is a straight bolt on kit or am I gonna have to modify anything on my 1997 YZ 125 and do the power valves include Springs rod and everything else needed for the cylinder
According to Athena, to assemble this cylinder kit on models YZ 125 1997-1998, you have to replace the original pipe with a version for the year 1999-2003 and for 1997-1999 models you have to order the 2-torsion original springs (valve) Yamaha year 2000-2003.
By Dee
Yes, there is a kit offered for that 2018 Honda CRF450R. Just be sure you choose that model before adding it to your cart.
By Anon.
The kit for that 2004 YZ250 would actually include a new power valve.
By zach
You should be good with running premium grade fuel, 93 octane or higher.
By zach
You would be able to use stock cams or aftermarket cams with this kit.
By Anon.
Yes, it would be recommended to use larger jets with the install of this big bore kit.
By Clint
1998 yz 125
For the 1998 YZ125, it would not be necessary to modify the cases to install this kit.
By James
I only see that we offer a 240cc kit for that bike. If you search our site for BBR 240cc Big Bore Kit, you should have no problem finding it.
Have a question? Please ask our experts and customers who own this product.