Engine Damage

Bottom of the guide broke off.....two options, replace the guide, or do nothing. Years ago it was common for Mitsubishi valve guides to break like that and it was considered OK by the manufacture.


Me personally, I'd replace the guides and do a valve job

Yep, I'd do a valve job.much cheaper to do it now than it would be if it broke more.

Pull the head replace the guides and have the valve seats cut. If it was my bike I would also replace the piston and rings since you are right there as well and new valves.

i do beleive you actually have the small pieces of the head which holds the valve guide in place....looks like a new head will be needed....however if the valve guide is still seated in the head and doesnt move then u could leave it...but a dropped valve will destroy the engine.....casting around that valve guide could have just been alittle brittle and broke off....u can see the in-mold of the actual guide....high reving definitely can shake thing loose