The carbon on the pistons is built up from the burning of oil. The rear cylinder must of been leaking oil quite badly..

The circlips are what holds the pin on the piston. The should be replaced everytime but its not the end of the world if you dont (but only if they are not defromed from removing them). They WILL NOT come with the piston rings. They have to be ordered seperately.

__________________
Did some trips.
Rode some bikes.
Fix them for a living.
Can't say anymore.

cleaning the gasket... getting ready for the parts.


i noticed that there's some scratches here. is it ok?


what about this? i think it's normal.

Those scratches don't look like they were done while the bike is running. They are in the wrong direction to start with...

The other marks are normal on a high mileage clutch.. As long as they are smooth ??

__________________
Did some trips.
Rode some bikes.
Fix them for a living.
Can't say anymore.

Those scratches don't look like they were done while the bike is running. They are in the wrong direction to start with...

The other marks are normal on a high mileage clutch.. As long as they are smooth ??

Hi Ted! the second picture with the scratches looks fresh but im sure that when gary and i took out the clutch, we didnt 'scratch' it. what do u think might have cause this scratch marks?

the 3rd picture: the marks are smooth...so thats a good sign?

I wouldnt worry about them. They look like they are scratched from someone in the past installing or rolling around on a garage floor etc.. They won't do any harm..

__________________
Did some trips.
Rode some bikes.
Fix them for a living.
Can't say anymore.

hi ted and all, the piston rings, valve stems+seals+guides, gaskets and clutch plates+disc has arrived. i had sent the valve set and the cylinder head to a workshop for alignment and installation.

will update on the good news!

remove and replace valve guides
hone guides to size
check new valves for run-out
machine valve seats using spec's from repair manual
check spring heights
assemble with new valves and seals.
cost: US$250-350
duration:3 days+

meanwhile, gary help me to hone the cylinder to fit the size of the new 0.25 piston ring that we ordered. after a few minute of work, we find that the 0.25 ring is too tight for the current cylinder. a few method we could get the piston ring fixed:

1) continue to hone the cylinder and take out more materials to fit the 0.25 rings and file the end of the rings to specification.
2) order a set of OEM (original) rings from singapore again. (got to wait)
3) purchase a set of OEM rings here in usa but the problem is:

can u advise me if the shadow 750 piston ring fits into my bike?
my VIN number is JH2RD07A9WM302728.

a kind soul from HUBB left a message for me:

Hi!
If you have covered such a high milage with a faulty air filter, probably you will need some new rings...it is a simple task, you will just have to deglaze the bore and fit some new rings. When you do that , just replace the valve seals and this should solve your burning oil problems. You can use Honda Shadow 750 rings and valve seals, since both models share those engine components ....and Shadow 750 was widely available in USA market...
It is :

13011MV1305 for the rings
12208-413-003 for intake valve seals
12209-413-003 for exhaust valve seal
World of Powersports w/ MC MART's 2000 Honda Street Bike VT750C SHADOW Parts Finder this is Honda Shadow in States...
Motorbike components for Honda XRV-750-W (G) this is Africa Twin in Europe...

what is your advice folks?

goh