There's a good exhaust with exup valve on german ebay for £77 for that money it's worth getting and taking the exup out. Item number141903897335, I think it's ended but contact the seller. Google for quick guide to speak german :lol
the night i was born, lord the moon stood a fire red., my poor mother her crying,
she said the gypsy was right, and she fell right dead
she said the gypsy was right, and she fell right dead