Top End rebuild time
Posted: Thu Sep 25, 2008 9:14 pm
Hello all,
some weeks ago I posted re a problem I was having getting my bike to run on all 6. I started off thinking it may have been a timing issue.
Well I can report back that it was not timing. The bike had been sitting for such a long time on its side stand that all the left hand inlet valves had closed up due to moisture.
So now that it is apart, I have found damage to the bores as well as the head so I need to do a re-bore, new pistons (2nd oversize) and rings, gudgeons, gudgeon circlips, one inlet valve, stem seals, gasket set and maybe some lifters. Bottom end seems fine.
OK question #1. The reason I say maybe lifters is that some appear to be water marked. That is the chrome has become a dark grey colour on the face of the "downside" of some lifters, that is the lowest point they were touching the head if that makes sense. You can feel no difference to the texture of the lifter, it just looks different. I haven't tried to polish the marks out. What are peoples thoughts? Ok to use or should I replace them?
Question #2. Some idiot (ok it was me) manually turned the engine over with the rocker cover off but with the tacho drive in place and broke the casing just like my book says it will. Can these re repaired or does someone supply just that casing without having to buy the whole set?
Question #3. Is there a preferred supplier of parts or is there a supplier that is most likely to be able to supply all the bits I need at something close to a reasonable price. I have priced some of the bits through Honda here in New Zealand and to say it is expensive is an understatement compared to some of the prices I see on the internet.
Thanks guys
Tony
some weeks ago I posted re a problem I was having getting my bike to run on all 6. I started off thinking it may have been a timing issue.
Well I can report back that it was not timing. The bike had been sitting for such a long time on its side stand that all the left hand inlet valves had closed up due to moisture.
So now that it is apart, I have found damage to the bores as well as the head so I need to do a re-bore, new pistons (2nd oversize) and rings, gudgeons, gudgeon circlips, one inlet valve, stem seals, gasket set and maybe some lifters. Bottom end seems fine.
OK question #1. The reason I say maybe lifters is that some appear to be water marked. That is the chrome has become a dark grey colour on the face of the "downside" of some lifters, that is the lowest point they were touching the head if that makes sense. You can feel no difference to the texture of the lifter, it just looks different. I haven't tried to polish the marks out. What are peoples thoughts? Ok to use or should I replace them?
Question #2. Some idiot (ok it was me) manually turned the engine over with the rocker cover off but with the tacho drive in place and broke the casing just like my book says it will. Can these re repaired or does someone supply just that casing without having to buy the whole set?
Question #3. Is there a preferred supplier of parts or is there a supplier that is most likely to be able to supply all the bits I need at something close to a reasonable price. I have priced some of the bits through Honda here in New Zealand and to say it is expensive is an understatement compared to some of the prices I see on the internet.
Thanks guys
Tony