KDXRIDER.NET

Having swapped my 220 kips power valve components to a 200 cylinder, I ended up finding something unexpected that could help someone in the future. The subvalves are inserted in from the top of the cylinder followed by the guides or bushings. The bushings are designed to support each subvalve and keep them from moving up and down from engine vibrations.

I found that the bushings on the 220 are .9mm (17.6mm) taller than the ones on the 200 (16.7mm). So, if you go to use the 220 bushings on a 200 cylinder, they will stick up above the cylinder and the entire power valve system will be locked up after tightening the cylinder head on. You can remedy this by removing material off the 220 bushings but I decided to use the correct part.

On the other hand, if you use the 200 bushings on a 220 there may be excessive up and down movement on each subvalve.

The way to tell the difference is by looking for a groove around the center of the bushings. The 200 bushings have a groove and the 220 don’t. Also, if you look at parts diagrams they are a different part number.

The 200 bushings dimensions are listed next to the part number as 6x15x17.2mm yet that is incorrect based on the 2 sets I got a hold of. The actual measurement is 6x15x16.7mm. No one has shed light on the difference between the bushings as far as I can see.

Lastly, It is known that you never want to mismatch a 200 and 220 main valve to your cylinder. If you have a 220 cylinder use the 220 main valve and vice versa. If not, you will have a clearance issue between the main valve and the piston or you will not be fully closing off the exhaust port at lower rpm’s. Hopefully this helps someone in the future.

Damn good info for those considering swapping to the other. Thanks for posting this up!

Where’s the like button….. thanks for the info.

JZ05220r, thank you for sharing this detailed info. It is and will be very useful to many of us.

Another update is needed to complete this topic. The right side covers are also a different part number between the 200 and 220. On the 200 the part number is 14032-1418 and on the 220 the part number is 14032-1419. I found that the governor/advancer shaft sticks up further out on the 200 cover and vice versa on the 220. This leads to a clearance issue when swapping an originally equipped 220 cylinder with a 200 cylinder. The paw gear has some serious binding issues that completely lock up the KIPS once tightened. This can be remedied by shimming below the paw gear. If you were to swap a 220 cylinder to the 200 you will find that the paw gear will not mesh as tightly with the gear teeth on the main shaft. Doesn’t appear to pose a serious risk in performance and function but there are definitely some people who may change their minds on doing a “displacement” swap with this info being available.

Reread this post again, could it be the 220 and 200.have a different deck cylinder height? This would explain the lower compression ratio on the 220 and hence the longer bushings required

kdxdazz wrote: 07:43 pm Sep 02 2024 Reread this post again, could it be the 220 and 200.have a different deck cylinder height? This would explain the lower compression ratio on the 220 and hence the longer bushings required

I’m not sure but it would make sense if that was the case. Obviously their are many many difference between the two cylinders.

kdxdazz wrote: 07:43 pm Sep 02 2024 Could it be the 220 and 200 have a different deck cylinder height? This would explain the lower compression ratio on the 220 and hence the longer bushings required.

If someone has an uncut 200H cylinder, I can measure my 220 cylinders to compare total deck height. I'd be very curious to know about this...

Could you measure and post please chuck, I have my 220 cylinder off now which I have just had heavily cut because of a bad sleeve install, I'll post the measurements to compare, hopefully I'll get the cylinder on today and check clearances and squish

Here is my cylinder, I'm guessing 0.5mm has been removed, hope it's not more, this is the SR model cylinder