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1250 build not going to plan. Check out these pics...
So I decided to start my 1250 build today. I noticed a big problem (i think). I have been riding with 2 broken exhaust studs (1 on each head) for god knows how long!! Which probably explains why I have had such poor mpg before I started the build. Can i use a metal brush to get rid of all the black carbon build up? Are these heads still usable? What should i do? Bike has 6k miles.
Last edited by RedTailChop; Oct 17, 2014 at 07:01 PM.
Back at home.
You can use a Bead blaster to clean up that chamber. As far as the exhaust studs.
You need to get them fixed. It shouldnt cost that much money if you can do it yourself.
If you cannot extract the studs without messing up the heads. Take it to a dealer or machine shop. SHouldnt cost that much money.
Brake cleaner and patience. You have to be careful extracting the broken studs because they are harder than the surrounding material and if you veer off your gonna do some damage. You can buy extractor bits and spray it with some penetrating oil the day before you extract it.
The heads look fine/normal.....I am going to disagree with the people above...first of all I don't like beadblasters unless you are going to completely dissemble the heads, because those damn glass beads get in all the crevices and bolt holes and are next to impossible to get all out without a dip tank..now you could get a beadblaster and put baking soda in it, that works real good and dissolves in water so it is easy to clean off....But what I would do is get a wire brush that goes in a drill (looks like a paint brush but round instead of flat) , they make 2 different kinds, course and fine, get the fine one and go to town cleaning the combustion area of the heads, the valves and valves seats are tough and you can use more pressure on them, on the aluminum be a little more careful as you don't want to scratch it up to bad, also use it to remove the old head gasket from the head, again being careful to not gouge the flat areas, when you are done clean the whole thing including the ports with some good solvent ( I like kerosene) and then with some brakekleen or carb cleaner...it is important to get the area where the head gasket meets the head real clean and grease/oil free....But, if you are going to send the heads out to have the studs replaced they are going to want to clean them and you might as well let them and while they are there have them install new valve seals...
+1 on the baking soda blasting. Get a large Rubbermaid type container and some plastic drop cloth, do the blasting inside the container to reduce the amount of baking soda dust. If not you'll look like Casper the friendly ghost when your done and you'll find fine white powder in your shop for years to come
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