Hey there!
Posted: 03:25 am Oct 09 2018
I'm Sjaak, I'm from the Netherlands, and just joined this community.
I bought a 1991 KDX200 a few months back, and rebuilding it now from the ground up because a crank seal blew. I finished the engine (all gearbox bearings, seals, etc. replaced too) and picked up the frame from the coater, so I can actually start building the bike now.
I hope to have fixed the problem of the KIPS by making new collars on top of the valves that barely allow any play (see picture for old and new situation). I thought that the single valve on the right in the picture had too much play when the gap of the collar was facing away from the rod, causing it to chip off teeth from the valve when there was a bit of carbon buildup. What's your opinion on this? Might the valves get jammed when the engine gets hot because the aluminum expands? (Gonna test it first by leaving the valves open and the governor disconnected, and see if the valves still move smoothly after blasting the bike around for a while.)
I found out later, there are steel KIPS valves available, so I'll definitely buy those if this doesn't work.
Thank you for having me in this forum, and I hope we can help each other out! Drive safe!
I bought a 1991 KDX200 a few months back, and rebuilding it now from the ground up because a crank seal blew. I finished the engine (all gearbox bearings, seals, etc. replaced too) and picked up the frame from the coater, so I can actually start building the bike now.
I hope to have fixed the problem of the KIPS by making new collars on top of the valves that barely allow any play (see picture for old and new situation). I thought that the single valve on the right in the picture had too much play when the gap of the collar was facing away from the rod, causing it to chip off teeth from the valve when there was a bit of carbon buildup. What's your opinion on this? Might the valves get jammed when the engine gets hot because the aluminum expands? (Gonna test it first by leaving the valves open and the governor disconnected, and see if the valves still move smoothly after blasting the bike around for a while.)
I found out later, there are steel KIPS valves available, so I'll definitely buy those if this doesn't work.
Thank you for having me in this forum, and I hope we can help each other out! Drive safe!