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Classic Goldwing Technical Forums
Goldwing Customization & Tricks
'84 1200 engine for a '82 GW
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<blockquote data-quote="canuckxxxx" data-source="post: 152232" data-attributes="member: 2409"><p>OK this might be a game changer: :crying: :head bang: Today I thought I would lap all the valves in using some fine grade valve lapping past. The left head valves lapped in fine; nice even gray bands around the valve head and the seats. But the right head has some serious pitting on both exhaust valves and their seats. :Awe: The black spots are actually pits in the surface you can see they have some depth when you shine a light on the right way. I think you can see near the top where the light is brightest.</p><p>[GALLERY=media, 26714][/GALLERY]</p><p>and the valve also has pitting at the contact band</p><p>[GALLERY=media, 26715][/GALLERY]</p><p></p><p>In addition #1 intake valve would not lap in. I got an even band on the valve but there is a portion on the seat that does not make contact. </p><p></p><p>I think the pitting is beyond what can be taken out by lapping. I could get new seats ground in but I think that would put the valves in too far.</p><p></p><p>What do you guys think? Time to start looking at those heads on the 1100? I get 150 psi on all 4, on the 1100, which I know isn't great but those heads are proven runners and might lap in OK. What are bennies of 1100 heads and cams on a 1200 (besides and additional 100cc)?</p><p></p><p>Thanks guys in advance. :beg: </p><p>Brian</p></blockquote><p></p>
[QUOTE="canuckxxxx, post: 152232, member: 2409"] OK this might be a game changer: :crying: :head bang: Today I thought I would lap all the valves in using some fine grade valve lapping past. The left head valves lapped in fine; nice even gray bands around the valve head and the seats. But the right head has some serious pitting on both exhaust valves and their seats. :Awe: The black spots are actually pits in the surface you can see they have some depth when you shine a light on the right way. I think you can see near the top where the light is brightest. [GALLERY=media, 26714][/GALLERY] and the valve also has pitting at the contact band [GALLERY=media, 26715][/GALLERY] In addition #1 intake valve would not lap in. I got an even band on the valve but there is a portion on the seat that does not make contact. I think the pitting is beyond what can be taken out by lapping. I could get new seats ground in but I think that would put the valves in too far. What do you guys think? Time to start looking at those heads on the 1100? I get 150 psi on all 4, on the 1100, which I know isn't great but those heads are proven runners and might lap in OK. What are bennies of 1100 heads and cams on a 1200 (besides and additional 100cc)? Thanks guys in advance. :beg: Brian [/QUOTE]
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Classic Goldwing Technical Forums
Goldwing Customization & Tricks
'84 1200 engine for a '82 GW
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