What the f!@?! is wrong with my bike!? (Honda GB)

[sammcj]

Input is always appreciated!

Well it is now a lot better than it was but... is there any way I could prove / disprove this?

[enth]

You would probably have to take the pistons out and have a look inside the cylinder for where it's not rubbing. But to be honest I wouldn't bother unless you had a whole weekend spare to mess around with it.

But if you say it's better then I'm most likely wrong and you shouldn't take my advice :P

[koba]

Input is always appreciated!

Well it is now a lot better than it was but... is there any way I could prove / disprove this?

How was it made bigger? Oversize liners can bulge and have all sorts of problems.

as for the plug reading, forget it, thats what the dyno runs were for.

any readings on old plugs are useless anyway, if you wan't to have a looksie (not a touchie) at the plug try it with a new one and pull it after a bit of running but do remember it is only a guide to how hot it is running and no where near as good as a proper dyno tune.

Also check your chain, the dyno curves look like they may have been run with a fucked chain, they have a quite a sawtooth pattern to them.

[sammcj]

She went from 500cc to about 600cc.
Chain is pretty new, but it was a bit loose at the time of the Dyno.


Bike is running sweet now! Starts and runs well; After tightening back chain rides a lot better.
Thanks for everyones help!