Patience rework.

[Wingedwheel]

Since the white stuff is flying it’s time to hunker down and take care of a few things I wanted to do to Patience. Missing the riding season with my shoulder injury didn’t help with motivation but I’m ready to move forward with a list of things I want/need to do. Last ride with this bike a buddy mentioned I was getting a little smoke out the right side exhaust. I kinda suspect a valve seal but I’m gonna go in and take a look. Last time I was in the top-end was during Covid. I had to replace an exhaust valve on the RH side so I want to go in and see how that’s looking. During this time getting parts was difficult at most and the only vendor with one was Mike’s and all they had in stock were SS. I had heard somewhere that if you replaced a valve with SS you also needed to replace the guide with a bronze? Anyone know anything about that?

 

[Wingedwheel]

I also want to do some other things that weren’t done. New wheel bearings, some rubber bits replacements on the gauges and I ordered a chain guide from GLJ because mine was really worn from the PO not keeping the chain adjusted. I have one guage damper but everyone either doesn’t carry them or they are OOS. I found a replacement OEM on Ebay(pricey) but if the ones on the bike lasted 49 yrs I should be good. Now I need a new Airbox crossover boot. Those are available but cost as much to ship as the price on the item. I’ll wait until I need a few more things.

 

[WideAWAKE]

Since the white stuff is flying it’s time to hunker down and take care of a few things I wanted to do to Patience. Missing the riding season with my shoulder injury didn’t help with motivation but I’m ready to move forward with a list of things I want/need to do. Last ride with this bike a buddy mentioned I was getting a little smoke out the right side exhaust. I kinda suspect a valve seal but I’m gonna go in and take a look. Last time I was in the top-end was during Covid. I had to replace an exhaust valve valve on the RH side so I want to go in and see how that’s looking. During this time getting parts was difficult at most and the only vendor with one was Mike’s and all they had in stock were SS. I had heard somewhere that if you replaced a valve with SS you also needed to replace the guide with a bronze? Anyone know anything about that? View attachment 340181

Is that a 2 piece valve?? Beyond my dislike of all things mikes - a 2 piece valve just doesn’t sit right with me.

Bronze guides would reduce the chance of ware.

Did you recut the valve seat when installing or just drop a new one in??

Easy enough at this point to swap to OEM (tried and true).

 

[Jim]

had heard somewhere that if you replaced a valve with SS you also needed to replace the guide with a bronze? Anyone know anything about that?

Yeah, manganese bronze is the current metal of choice with stainless valves. Maybe just me, but I'd use the bronze guides regardless of valve metal.
Bronze is much better than cast iron (original guides) at transferring heat. Not to mention less friction and wear...

 

[Wingedwheel]

Is that a 2 piece valve?? Beyond my dislike of all things mikes - a 2 piece valve just doesn’t sit right with me.

It’s a one piece. I didn’t recut the seat, just lapped it in. At the time with everything closed down and limited resources that was my only option.

 

[Wingedwheel]

Pulled the top end off today and thought things looked pretty good. The plugs were pretty identical but there was more carbon buildup on the right side which is the side that my buddy said was smoking. I’ll pull the valves and see how they look.