Lower end rebuild.

[Jesse8931]

Ok I'm gonna rebuild the lower end with help from a friend and I wanna order all the parts at one time so I can have this thing all finished in one day.

Here is a list.

 

[Blaaster]

I am presuming that you have had the barrel measured for wear.

The machinist must have the new piston in hand before the re bore is started as they require a different tolerance.

 

[Jesse8931]

I am presuming that you have had the barrel measured for wear.

The machinist must have the new piston in hand before the re bore is started as they require a different tolerance.

yes it was measured and will need a 67mm piston.

 

[Blaaster]

What I was aiming at saying is that a cast piston should not really be slipped into an old bore, they really should be fitted into a fresh bore cut to their tolerances.

I have witnessed a few forged pistons that have been fitted into a supposedly good cylinder, meet catastrophic destruction.

With a forged piston there is no room for mistakes.

 

[OConnor Racing]

Additions to your list:

Change all of the seals
Change the clutch and counter balance shaft washers
Change the snap rings on the kick idle gear
Use an OEM base gasket

 

[Jesse8931]

So the vito's base gasket is no good ?

 

[Blaaster]

Paper gaskets can leak.

 

[Jesse8931]

Well I looked up the oem gaskets and they are cheaper so I think I will order all oem parts except the vito's crank and piston.

 

[Wifesblaster]

Well I looked up the oem gaskets and they are cheaper so I think I will order all oem parts except the vito's crank and piston.

If you are replacing the crank I would put a stroker crank in. Make the build worthwhile.

 

[Jesse8931]

If you are replacing the crank I would put a stroker crank in. Make the build worthwhile.

I think with the extra 30 bucks Ill be saving with oem parts I can get the stroker crank.

 

[gb blaster]

Stroke it!!!

Your buddy your doing it with and you are really good mechanics?

Rebuilding a top and bottom end takes ALOT of know how.

Not to try and discredit you or anything by any means.

Just saying this isn't exactly a job for beginners. Best of luck tho.

 

[Jesse8931]

I've built engines before lots of two strokes just none with a trans.

 

[Jesse8931]

I'm also gonna go ahead and use a cast piston as well to save some dollar's.

 

[Jesse8931]

So you can see its missing one of the washers.

I'm gonna order the stroker crank but what I need to know is the space that vito's include do I use a oem base gasket with that or just the spacer. ?

 

[Herpderplol]

You will need two OEM base gaskets. One for below the spacer, one for above. DO NOT USE THE CHEAP CRAPPY PAPER GASKETS, THEY DO NOT WORK