We've been tackling 'Stacey's engine. We've managed to do a bit today using the Haynes Vespa manual and a brilliant set of videos by a guy called 'Sausage' - no honestly, that's his name! He has cult viewing status in our house........he makes things look so easy. Anyway lots done until we reached the clutch and discovered that we needed a clutch puller tool....which we've needed to order. Ah well!
Steve
Steve
the external view of the cylinder head
the base of the head, it's definitely a Malossi conversion
top of the piston, heavily carboned
the piston at the top of the bore
side view of guegon pin (at least that's how I think you spell it!)
some burning at the top but not below the rings
now for a decision, is it still OK or do we need to replace it?
Anyone got a view?
the crank showing through
the rear brake shoes and rear brake back plate
behind that back plate is the clutch cover
this is the brake back plate
the main driveshaft I think
the cover off and the clutch exposed
we need the clutch puller to get the clutch off the tapered spindle
the clutch looks like it is in good condition, I think!
Steve:
ReplyDeleteLooks like fun!
I believe the pin attaching the piston to the connecting rod would be called a "gudgeon pin", spelled the same as the gudgeons that take the pintles for Arwen's rudder.
Over here in the USA, that pin is called a "wrist pin."
God bless!
Wayne
ha! That makes sense. The guy who told me the name of it had a georgie accent so thick I thought he was from Scandinavia somewhere. took me a few minutes to work out he was speaking english. Didn't sound like my other georgie friends - so thanks Wayne. Gudgeon I understand! I quite like 'wrist pin' better actually
ReplyDeletesteve
hi Steve
ReplyDeleteOn a two stroke engine a certain amount of blowby past the piston rings is normal. That's the dark staining in your photo.
So long as the piston is not scuffed too badly around the lower part of the skirt it's likely to be OK
What you do need to do is to clean out the piston ring groves. be very careful when removing the rings to not break them - particularly the lower ring- they're made usually of cast iron and very brittle. Check carefully that the little roll pins which locate the ring gaps are secure in the piston. carbon on top of the piston is less critical. It usually flakes off on its own and passes through the exhaust when it gets to a great enough thickness thickness.
If you need any info just ask and if i can help I will.
Lovely pictures on your blog BTW.
Jim E-mail flexwing462 at yahoo dot co dot uk
hey Jim, thanks for the comments and advice - much appreciated - really useful tips. we'll post more on engine renovations soon
ReplyDeletestay in touch and thanks
steve