Misfires above 4,500

[jon stead]

blimey...
did you buy the pipes or were they on the bike when you purchased it?

On the bike when I got it. It never ran correctly from day one. Serious oil leak from engine, fuel leaking out of carburettors. Then compounded by incorrectly fitted electronic ignition system and after sorting all these out, it still wouldn’t run right. It runs good now though. :-)

[Woodside]

great
are they genuine honda pipes or a copy...

[Trigger]

Some years ago I had a inner pipe rust away from the outer on the top and vibrate at above 1700 RPM. That had me stripping the head down to try and find the problem as the echo sounded like it was in the head.
Great to see you have it all sorted.

[hairygit]

I'd be tempted to e -mail photos of that to Honda, just to see if they respond!

[jon stead]

great
are they genuine honda pipes or a copy...

Genuine Honda

[jon stead]

I'd be tempted to e -mail photos of that to Honda, just to see if they respond!

Not a bad idea. Do you happen to have a contact email address for them?

I’ve read on Classic Japanese Bikes, that this has happened on other makes, Yamaha and Suzuki, and has been attributed to a manufacturing defect that gets worse when heated, I guess especially if it overheats when running lean.

[Woodside]

genuine honda ....christ
im just off to the garage to cut my set up to double check they are are ok

[K2-K6]

genuine honda ....christ
im just off to the garage to cut my set up to double check they are are ok

 

[Trigger]

genuine honda ....christ
im just off to the garage to cut my set up to double check they are are ok

Woodside, can you cut up a set for me as it will save me doing mine 

[Woodside]

ok just to let you know ive cut up 2 sets and all 8 are ok...
so all is good

[Trigger]

ok just to let you know ive cut up 2 sets and all 8 are ok...
so all is good

I will take your word on it, and not cut mine then to see 

[Woodside]

all joking aside..its great when you nail a problem and get a fix...not surprised it took some finding thats a shocker
stick a few miles on the clock and enjoy
 

[Johnwebley]

ok just to let you know ive cut up 2 sets and all 8 are ok...
so all is good

I will take your word on it, and not cut mine then to see 

  maybe I need to check mine,it runs out of steem above 10k

[royhall]

Ive arrived a bit late to this party. Up early today so thought I would read this from start to finish. Had a few ideas building until I got to the end. What a thriller of a finish that was, who would have thought to look there. The one thing that jumps out from this story is Jon's tenacity to see it through. Well done mate that's an inspiration for many on here to get out to the garage and get it done. Nice one Jon.

[Bryanj]

John, something wrong there i used to get miner out of the top of the red band in first 3 gears