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Thanks for all the input

There are no timing marks on these cases so I’m going to check how the original builder set it.

What should static timing be set at with just an enhancer? Anybody know ??

Hey man, it's been a long time!! I don't know for sure but they came from a reputable shop. I ended up putting a new top end in it for him this winter. I checked the squish at that time but can't remember what it is. It was pretty conservative from what I remember.

Okay. Sounds like another vote for checking the head/deck. I will do that. Currently the cooling is set up flowing from bottom to top. 4 lines feeding the sides of the cylinder, one feeding the manifold, and 4 coming out of the head. From what I have seen it seems like this is the way...

Edges of the orings look like you put them in a frying pan......

I might double check the head surfaces and cylinder. I could see how that would cause the oring to leak, but not how it would cause the orings to melt.......????

Reviving an old thread. This dang 1200 is still burning up orings. I guess I might try feeding the head first. I thought when I found the timing issue that I had it figured out. Stator is staying put now, but still burning up orings. This thing has been a nightmare. It's running plenty...

Carbs are SE Ninja's

I think I'm on the right track now. Thanks guys. Next I need to get it to idle smoothly. Thinking bigger pilot jet or checking fuel pressure.......Not sure but seem like good places to start.

That's the thing.......He actually had them come loose once before. I had found it for him and tightened them really good and used red locktite. The guy who originally assembled it had missed a number of bolts and I found a number that weren't tight. I just assumed he didn't get them tight...

I will find out on the Orings what kind they are. I think I may have found the culprit. I started digging in deeper and found that the stator had turned. It was rotated fully counter clockwise.

Based on piston wash it is super rich, but reading piston wash is probably kind of useless if there was a lot of water being run through it. Plugs are fairly dark. He did have it run away on him early on after the motor was initially put in. I blamed the first set of burnt Orings on that...

He has also blown out two manifold/chamber couplers on his RRP pipe. Makes me wonder how hot his exh. manifold might be running as well. I wish I had seen what they looked like when he removed them. This would be a whole lot easier if I had ridden it more.

Yes, two feeding each side of the cylinders and two out of each side of the head.

I know!!!! It's crazy. I only rode it one time. I know he never checked any temps. I didn't see all of this nastyness until now and started looking into it. I have a TPE and it runs way too cold. I know billet retain more heat but somethings not right. To me the water lines look correct...

I'm looking for suggestions. I'm working on my buddies Dasa 1200. He just got the motor last year and someone else installed and tuned it for him. He has burned up three sets of orings on his domes in a VERY little amount of run time. Probably 10 hours at the most. They look like over cooked...

Shoot. Can’t go this year.

Can’t find it listed anywhere. What are the 2023 dates?

That's crazy. It's not coming out that vent hole at all. That side of the motor actually stays fairly clean. With the OEM F/A it seems to come out and dump right on top of the head.