Hyper 50 piston

Hi guys, whilst stripping my Raptor50 after its untimely auto the other day I decided to pull the engine to give it a check over as this is the second time it has stopped for no aparent reason.
The pic below tells it all




This is the result of me not taking the advice I give to others about leaning engines out to much. I must have lost track of the needle setting and last time out I gave it a couple of clicks leaner thinking I was at 1.5 turns out. Wrong the needle ended up at just over 1 turn out which is far to lean as the picture proves. The piston crown has started to melt and dish in whilst the rim has melted and broken up.
The bore is scored and the rear bearing feels shot.
It will probably be cheaper to buy a new engine than to rebuild this one. Anyway I have always fancied a YS50 pumper!!!!

Regards

DaveS

Just priced the spares with Real Raptprs on line.

Pison-liner-piston rin-bearings

around 107.00 plus p&p

can buy a TT53 redline for £127.00

W hat would yo do?


DaveS

I would convert it to Electric, but then my brain may have been damaged by playing around with amps and volts for too long

I would treat myself to a whole new engine though

Cheers
Andy

go new redline

Cheep one on BMFA now

http://www.bmfaclassifieds.co.uk/detail.php?id=78548

M

Nice one Mark, just bought the engine off the BMFA site.

Regards

DaveS

gd gd hope its not a dog now he he