Posts: 161
Joined: 9/3/2010
Location: IL, USA
I have a race YZ250F head I got from a team a few years back when I was sent it back after getting new valve guides put into it the valve seats weren't put in all the way and I dropped a valve into the piston. The only part with the head is around the bucket got blown out I didn't know if there was any way this could be fixed or not? It's a pretty nice race head and I would rather not scrap the whole thing.
Posts: 3388
Joined: 4/3/2013
Location: Benton, LA USA
Fixable??? Yes, but at what cost?
It will cost more than the head is worth to fix it.
Paw Paw
Posts: 161
Joined: 9/3/2010
Location: IL, USA
Paw Paw 271 wrote:
Fixable??? Yes, but at what cost?
It will cost more than the head is worth to fix it.
Paw Paw
Any idea on who could fix it or for what price?
Posts: 372
Joined: 4/15/2018
Location: TN, USA
If it were me I would reach out to Millennium Technologies, sure there are others but I've used these guys on two stroke cylinders and they do awesome work. Like Paw Paw said though may be more to fix it then it's worth.
2018 KX450F
2005 KX250
2003 KDX 220
1984 KX 80
1982 RM 80
1980 RM 80
1977 XR 75
1969 Honda Mini 50
Posts: 5506
Joined: 1/31/2018
Location: Mansfield, OH USA
You can try to reach out and see if someone can attempt to repair it.
I work at a tool and die shop, and we get stuff like this every so often on tooling. And in thin spots like that, you just cant weld it so its strong. And im talking about steel stuff - not aluminum.
Maybe a shop will try for it.. i think youd be better off getting a new head.
Posts: 120
Joined: 11/6/2018
Location: DEU
Easy fix - machine it out to proper surface and roundness, press a sleeve into the warmed up head, machine the sleeve with internal dimensions suitable for the original cam follower and start all over again.
