Need help diagnosing
Dirt don't hurt
Joined: Jan 2011
Posts: 21,066
Likes: 4,568
From: Haslet Texas
Thanks for the recommendation on gaskets, long as Cometic has rubber for the rocker boxes im good using them.
Mileage on the bike when I got it in May showed 9000 on the odometer and PO assured me it was accurate, I have 13400 on it now. Had a local indy check it over the day I bought it and said the bike is super clean and thinks millage is probably legit. Only thing I know for a fact is I called S&S and the bottom end did come out of there facility in late 95. Besides having to replace the ignition the bike has run flawless. I just road 2 up with the wife and all of our gear over 800 miles in two days climbing through the mountains to the coast and back and never a hick up, burned through a quart of oil though. I've read about noise and vibration from other evo's but mines super smooth and no noise at all.
Mileage on the bike when I got it in May showed 9000 on the odometer and PO assured me it was accurate, I have 13400 on it now. Had a local indy check it over the day I bought it and said the bike is super clean and thinks millage is probably legit. Only thing I know for a fact is I called S&S and the bottom end did come out of there facility in late 95. Besides having to replace the ignition the bike has run flawless. I just road 2 up with the wife and all of our gear over 800 miles in two days climbing through the mountains to the coast and back and never a hick up, burned through a quart of oil though. I've read about noise and vibration from other evo's but mines super smooth and no noise at all.
Seasoned HDF Member
Joined: Aug 2008
Posts: 5,082
Likes: 2,159
From: Ohio
One of the cylinders shows scuffing from the piston, main reasons for a failure like this is heat. Need to make sure your air/fuel mixture is good with the new engine, slightly lean conditions can cause the issues pictured so know that jetting when putting it back together with a new bore.
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Road Captain
Joined: Apr 2015
Posts: 636
Likes: 35
From: NorCal
One of the cylinders shows scuffing from the piston, main reasons for a failure like this is heat. Need to make sure your air/fuel mixture is good with the new engine, slightly lean conditions can cause the issues pictured so know that jetting when putting it back together with a new bore.
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Road Captain
Joined: Apr 2015
Posts: 636
Likes: 35
From: NorCal
I have a couple threads going since this one was started asking for advice. Thanks to everyone here who has helped me out with my bike, you all are great and make things so much easier. Thought id update this and post my progress with what I've decided to do on the build. Also wanted to update with what we found the problem to be.
I ended up finding a place called Freeman Choppers in Chico, only an hour drive for me. These guys are great and do everything in house including dyno so real glad I found them. He suggested I run 10:1 Wiseco forged pistons with my EV46 cam, go through the heads and Cometic gasket kit. Cylinders were actually in decent shape and he only has to go .05 over on them. Heads.....not so much. This is were my main problem was. He said that the spring retainers were coming loose actually destroying the valve seals and basically pumping oil out my exhaust, hope I explained that right? He ended up installing a set of PSI? (think thats what he said) valve springs and going through the heads. Im taking the bike down to him on Saturday to have him look at the bottom end before I put it back together just for piece of mind. Then im gonna have them dyno tune it after I get it broke in.
I ended up finding a place called Freeman Choppers in Chico, only an hour drive for me. These guys are great and do everything in house including dyno so real glad I found them. He suggested I run 10:1 Wiseco forged pistons with my EV46 cam, go through the heads and Cometic gasket kit. Cylinders were actually in decent shape and he only has to go .05 over on them. Heads.....not so much. This is were my main problem was. He said that the spring retainers were coming loose actually destroying the valve seals and basically pumping oil out my exhaust, hope I explained that right? He ended up installing a set of PSI? (think thats what he said) valve springs and going through the heads. Im taking the bike down to him on Saturday to have him look at the bottom end before I put it back together just for piece of mind. Then im gonna have them dyno tune it after I get it broke in.
Dirt don't hurt
Joined: Jan 2011
Posts: 21,066
Likes: 4,568
From: Haslet Texas
I have a couple threads going since this one was started asking for advice. Thanks to everyone here who has helped me out with my bike, you all are great and make things so much easier. Thought id update this and post my progress with what I've decided to do on the build. Also wanted to update with what we found the problem to be.
I ended up finding a place called Freeman Choppers in Chico, only an hour drive for me. These guys are great and do everything in house including dyno so real glad I found them. He suggested I run 10:1 Wiseco forged pistons with my EV46 cam, go through the heads and Cometic gasket kit. Cylinders were actually in decent shape and he only has to go .05 over on them. Heads.....not so much. This is were my main problem was. He said that the spring retainers were coming loose actually destroying the valve seals and basically pumping oil out my exhaust, hope I explained that right? He ended up installing a set of PSI? (think thats what he said) valve springs and going through the heads. Im taking the bike down to him on Saturday to have him look at the bottom end before I put it back together just for piece of mind. Then im gonna have them dyno tune it after I get it broke in.
I ended up finding a place called Freeman Choppers in Chico, only an hour drive for me. These guys are great and do everything in house including dyno so real glad I found them. He suggested I run 10:1 Wiseco forged pistons with my EV46 cam, go through the heads and Cometic gasket kit. Cylinders were actually in decent shape and he only has to go .05 over on them. Heads.....not so much. This is were my main problem was. He said that the spring retainers were coming loose actually destroying the valve seals and basically pumping oil out my exhaust, hope I explained that right? He ended up installing a set of PSI? (think thats what he said) valve springs and going through the heads. Im taking the bike down to him on Saturday to have him look at the bottom end before I put it back together just for piece of mind. Then im gonna have them dyno tune it after I get it broke in.
You ought to be real happy when your done.
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