How's it look? (Head/Piston)

[MSFIT]

All original parts, how does it look? Both intake and exhaust are too tight to measure. At the last valve check I had one intake valve that couldn't take any feeler, figured I'd be looking at a valve job soon.

 

Kibblewhites? TRX? Should I replace piston, or can it be cleaned?

 

[FORMA MOTO]

Typical

 

How does it measure....that's what counts...

[Racer132]

Cut the valve seats(get the head checked out for guide wear

Put new valves in it and valve stem seals

Replace piston/rings

[Qqqqqqqqqqqq]

Check the cam chain and tensioner for wear .

[Dust_Devil]

Do the hokey pokey and turn yourself around...

[yellowdatsun]

Can't tell piston wear by looking at the top, it's the sides that show the wear. From the top yours looks normal.

[TDW]

Do the hokey pokey and turn yourself around...

 

Dude, thats what its all about...

 

sorry couldnt resist.?  

[zack05]

Do the hokey pokey and turn yourself around...

Best post on here in a long time!

[MSFIT]

Can't tell piston wear by looking at the top, it's the sides that show the wear. From the top yours looks normal.

 

I pulled the piston and cylinder yesterday - I didn't get a good picture of the piston, I'll take another tonight.

 

Here's how the cylinder wall looks: (I don't have a telescoping gauge and mic to read it)

 

How do I clean all of this? Piston head, that top portion of the cylinder, and the gasket material on the surfaces.

 

Edited February 2, 2015 by MSFIT

[zack05]

Buy a new piston and you won't have to clean the old one. Use a red scotchbrite pad and some Bon Ami cleanser in the cylinder, followed buy a hot water and Dawn wash, then wipe with a white rag and some auto trans fluid. If white rag is still white after wipe down, then cylinder is ready to go. The gasket surfaces use WD-40 and a scotchbrite pad. Send head to rebuilder of choice for new valves, and it will come back all clean and shiny. All of your parts in the pics look very typical.

[Spud786]

Need a bore gauge, other wise if your cylinder is full of cross hatching would indicate little to no wear. you can also look at the ring end gap of new rings to confirm they are in spec. and if the ring end gap is in spec then the cylinder would have to be in spec too.

Edited February 2, 2015 by Spud786

[MSFIT]

Buy a new piston and you won't have to clean the old one. Use a red scotchbrite pad and some Bon Ami cleanser in the cylinder, followed buy a hot water and Dawn wash, then wipe with a white rag and some auto trans fluid. If white rag is still white after wipe down, then cylinder is ready to go. The gasket surfaces use WD-40 and a scotchbrite pad. Send head to rebuilder of choice for new valves, and it will come back all clean and shiny. All of your parts in the pics look very typical.

 

 

Need a bore gauge, other wise if your cylinder is full of cross hatching would indicate little to no wear. you can also look at the ring end gap of new rings to confirm they are in spec. and if the ring end gap is in spec then the cylinder would have to be in spec too.

 

Great stuff, thanks.

 

To start with it'll be piston, rings, gaskets, and send the head out for new valves. 

[Leardriver]

The bore looks pretty typical. They are hard and last a long time.

 

I hate the though of taking a bike apart and not replacing a piston. They are so cheap.

[MSFIT]

Thanks everyone!

 

I think I'll be getting a head from APE, new Piston, rings, clips and gaskets from Honda.

[RyGuy85]

Typical

 

How does it measure....that's what counts...

That's what she said. Couldn't help myself

[RyGuy85]

Curious, how many hours did you have on your bike when you tore it down?

[MSFIT]

Close to 700.

[RyGuy85]

700?? You sure you don't mean 70?

[MSFIT]

700?? You sure you don't mean 70?

 

4 years of riding almost every weekend, add in a few trips to pismo, foresthill.

Edited February 14, 2015 by MSFIT

[cb0y1]

For the piston, if you don't race, I recommend the TRX450 piston, it greatly reduces oil consumption and keeps the oil cleaner since it has a oil scraper ring too