Had a play today and got head off as you can see just marked piston hoping it's ok

Liners are fine


As head is fooked


So do I second hand head or new engine???

Also for @Lee



Sent from my E6853 using Tapatalk

Starting getting there now decided not to give up as I don't admit defeat awaiting delivery of cylinder head and gasket so I can finish up. Since carbs are off ill be deep cleaning them


Sent from my E6853 using Tapatalk

I'd replace that piston mate just to save this problem becoming a holy piston and bottom end rebuild. Shouldn't be too costly though you'll need it re-boring and honing as that barrel and piston will have worn to each other.

New piston ~£30?
Re-bore around ~£25-40

Looks worse on photo than it actual is

New piston £30??? Think you need look again rings are £100 a piston

Sent from my E6853 using Tapatalk

SMUDGER wrote:Looks worse on photo than it actual is

New piston £30??? Think you need look again rings are £100 a piston

Sent from my E6853 using Tapatalk

Fowlers do them for £50.
Quick check and seen loads for €50.
New piston is £60.

https://www.fowlersparts.co.uk/parts/50 ... haftpiston" onclick="window.open(this.href);return false;

I wouldn't be leaving a damaged piston in but its your call. Its impacted a valve and chipped the crown.

Id be looking for a low milage replacement engine or it would be getting broke for spares and buy a new bike.

So that's £240 on pistons and £200-£280 on rings depending on rebore as let me see pointless doing one

Sent from my E6853 using Tapatalk

Why are the rings so expensive? Are they an odd size or fancy material?

Thats why id be looking at a new engine or bike.
What did it cost to buy if you don't mind me asking?


Sent from my iPhone using Tapatalk

rumpoldstilskin wrote:Why are the rings so expensive? Are they an odd size or fancy material?

Was pretty surprised at £50.
Even ktm are cheaper for mine.

Mind you a piston is £320 compared to the £60 for honda.

Wonder if a hammer can straighten these


Sent from my E6853 using Tapatalk