A rider ...

[Ricks]

Got the inner ring today.

Now, if I had ordered properly, I would not have had a problem.  It seems I misread, and ordered a RNA2202-2RS bearing..  This does not include an inner ring, and is made to ride directly on a shaft.

The CORRECT PART NUMBER is NA2202-2RS.  This includes the inner ring. 

The company below is where I bought mine.  They have the correct bearing, available from 3 different manufacturers.  Just type the part number in the search. I personally choose the INA brand, as they are made in Germany.  The NRB bearings are cheaper, but made in India.  The FAG brand, I don't know the origin, but are the most expensive.

http://www.locateballbearings.com/Search

[pd]

Thanks for that ^ , Rick .

 How do Wayne's billet rods compare to Bob's ?

And , you said you installed a longer rod ... how much longer ?
I would think not too much , as even a protruded tip spark plug is way to 'deep', even with an indexing 'washer' . They get closed without a full stroke .

Pete .

[Ricks]

I have never used one of Bob's, but they look nicer.  Wayne's does not have a bronze bushing in the small end, the pin just rides in the aluminum.

Wayne makes a standard size and a .030 longer rod.

[pd]

Thanks , Rick .

Looks like I'll be talking to Wayne , before long .

Pete .

[pd]

I finally sent my cylinder to Wayne for  boring to an oversize piston with rings . I asked him to fit that piston with a wrist pin and clips , along with a billet connecting rod .

I noticed that his shipping address is different than the address in Bob Gurkin's post in the suppliers section .

Hopefully , I'll end up with a motor that runs for more than 10 minutes .

Pete .

[Ricks]

The reason for 2 addresses, you can't ship UPS or FedEx to a PO Box.  91 Hudson Road, Decatur, Al is his physical address.

I have the same issue.  We do not have home mail delivery in my town, so we are issued a PO Box by the USPS, no charge.  If a package is sent FedEx or UPS to me, then I give my street address.

[pd]

Ah , makes sense . I should have figured that out .

We have two . Where we happen to be at the moment  and our mail service 'resident' address .

Pete .

[pd]

My cylinder and new parts came via the brown box on wheels this afternoon .

Wayne does some very nice work .
Maybe now I can have a decent running bike .

I'll make work of getting it back together and see how it turns out .

Pete .

[pd]

The motor is back together and looks pretty good .
I haven't tried to fire it yet . Gotta save something for tomorrow .

I replaced the OEM compression plate screws with socket head screws . 8 - 32 X 1/2" . I went with standard lock washers on top of flat washers . All stainless .
The OEM screws are 3/8" long . I had a couple of those loosen a little too much , as if they were starting to strip threads . I checked the screw holes and found there was room for 1/2" , but an extra washer was needed for a nice snug fit on 4 of the dozen holes .
Anyway , I think it looks fairly decent and there was no sense of thread weakness , likely due to the extra threads I was able to reach with the longer screws . I'm glad it worked out that way as I really didn't want to go with bigger screws or have to install heli coils .

Pete .

[pd]

This morning , I spun the motor a few times , then flipped the ignition switch to RUN .

Run it does , and very nicely . It's a one kick to start machine and takes me down the road at about 40 MPH . Maybe a bit faster , but I had no speedometer to tell me for sure .

I'm very happy with the way the motor turned out .

Now , I have to work on better lighting .
After I go for another ride .

Pete .

[Ricks]

Excellent Pete! Now you can ride with us at Portland next year.

[pd]

Yup . But , I'll have to clean the piston and cylinder up and then put everything back together , again .

 Something got into the cylinder and caused a seizure . Not real bad , if any seizure can be anything but .
It must have been in there from the start as I heard something that I thought was probably the transmission making a noise . I was wrong .
I found no evidence that anything was on top of the piston . I think whatever it was introduced through the exhaust port . The seizure site was at the exhaust port 'rib' . On the piston , from just above the rings to the bottom of the skirt . I think the piston is salvageable and should clean up decent . The cylinder should clean up with just a few passes with a hone .

So much for a fresh bore and piston .

Pete .

[Ricks]

Did you measure the ring gap?  How about piston clearance?  I have posted before, but I think Wayne keeps it a little tighter than others would like.  If you don't have .005" piston clearance cold, it will seize when hot.  I have measured the piston growth at about .004" at 425 degrees.  I set the rings around .008", but Bob Kerr told me that is the MINIMUM.  He suggests a little more, like .010".

[pd]

I did not measure the ring gap or piston clearance , yet . My mistake .

The noise I heard was being made right from the first start , cold .

The piston seemed a bit tight , but I thought with a fresh bore that was typical .
Anyway , I'm sure that after I get things cleaned up , there will be more clearance .
I'll check the ring gap before I put it all together .

Rick , Thanks for posting the clearances I should have .

Pete .

[pd]

I tore the top end off the motor and honed the cylinder until I could have a .005" feeler gauge blade alond side the piston inside the cylinder and still move the piston . The ring gap : one has .011" and the other has .014" clearance .

I put it back together and it fired and ran nicely , for about twice as long as it did with Wayne's bore job . It is siezed , again . 

 I'm getting a bit tired of this ...

Pete .