Won't start, occational backfire opinions please

[storkfoot]

... just trying to avoid unnecessary faffing

get a TS1, mate You know you want to

PS, my money's on your snazzy stator

[soulsurfer]

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

^

[coaster]

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?

[tobytyke]

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.

[storkfoot]

..... 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:

[coaster]

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.

[sean brady scooters]

no discolouration you say ?
its all black and charred.

[Andy Pickering]

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..

[Muppet]

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


muppet

[coaster]

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.