Jump to content
Sign in to follow this  

kx100 oring chain

Recommended Posts

Anybody put an oring chain on a kx100? I just put an RK420SO chain on my son's kx100. I was tired of adjusting the standard chain. When I ordered it I didn't consider the strength. Now that it is on the the bike I have to admit it looks a little wimpy. I don't want to be 30 miles from the truck and have it let go. Now that I am concerned, I see some have gone to a 428 oring chain. Anybody with experience with one of thes chains? Thanks

...robert

Share this post


Link to post
Share on other sites

we have the 428 upgrade and have tried the o-ring. There is a slight different feel and a slight loss in power you can barely feel. When we had the 420, my son was going through a chain a week. Granted he races mx and practices everyday for as many hours as he can. He'll burn 10 gal gas a day, easy on our practice track.

After really doing my homework, I found if you wanna stay standard, The Renthal R1 is the strongest and it actually lasted him about 6 months. I made one adjustment after the initial stretch (about an hour of riding). After that not much adjusting. Granted between flats and some periodic maintenence done. I only had to finaly cut a link after 5 months, then it finally went on a rough set of whoops at an indoor track.

Renthal no longer makes the conversion sprockets. JT and Sprocket Specialists do though. We run a 14/52 for open tracks and drop to a 13 for tighter tracks. Watch the front sprockets, My son went through at least 8 last year. The rear was the last of the Renthals I found on Ebay and it lasted all year. Luckily I got the last 2. So he has one for this year.

The R1 is rated at 5800psi, the highest of any manufacturer. The Oring is 6800psi. Much stronger but he needs all the power he can get in Supermini. So this time, once it stretches to need cut, I'm just going to replace it.

Share this post


Link to post
Share on other sites

I did the 428 conversion to my nephews kx 100 a couple of weeks ago, JT sprockets(13-51) and an RK o-ring chain. I have yet to adjust the chain. We'll use the bike for hare scrambles racing this year, and there is no way I was going to travel around New York and New England with the wimpy 420 setup.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Reply with:

Sign in to follow this  

×