Scooterotica

coaster wrote: ... just trying to avoid unnecessary faffing

get a TS1, mate You know you want to

PS, my money's on your snazzy stator

lambytone wrote:Why prolong the inevitble, if it was me I'd get the barrel off and check for a blown head gasket

^

soulsurfer wrote:

lambytone wrote:Why prolong the inevitble, if it was me I'd get the barrel off and check for a blown head gasket

^

Yes Mike I'm keeping my fingers crossed that is the problem too

And Paul, I know where you're coming from mate but I hate admitting defete , got that clutch sorted yet?

Excat same problem as i had...take the exhaust off and look up the exhuast port...i reckon youlle see the bottom ring as shed its peg...and gone walkies....(read my post)...i too was using a stage 4 indian head...i had the the head rebored and fettled at Mb,s..its perfect now.

coaster wrote: ..... got that clutch sorted yet?

turned out the the clutch was not slipping at all. It was a worn out drive spring and ramp on the front sprocket that made it seem like clutch slip. Mr. Winstone and Mr. Tid diagnosed the problem :bigsm:

Update, managed to get a couple of hours on the scoot today, whipped the barrel off and was greated by this, you were right :




No sign of damage on the underside

Cleaned up ok and rings freed off easily enough


I reckon the piston at least started to go about 3 weeks ago when it suddenly lost power whilst I was giving it some stick. I noticed that the exhaust flange has been leaking so it might have been a bit weak. The piston is an MB Racetour and the crown seems very thick, there is no discolouration underneath the cratered area so I might put it back together and see how it goes before risking another piston in it.

no discolouration you say ?
its all black and charred.

A sad sad sight pal..id say first cause of action would be to investigate and seek the reason why its got so hot and started to eat the piston..

piston rings might be free but it's goin to get hot when it starts blowing past the damaged top ring groove,
:smug:


muppet

Muppet wrote:piston rings might be free but it's goin to get hot when it starts blowing past the damaged top ring groove,

That is a good point.

Sean, what I meant was that the colouration is uniform, no localised signs.