oil spinner cleaning and other tune up recomendations

[theboxgobbler]

I am always reading about engine maintenance and specifically cleaning the oil spinner. I haven't tore into one of these motors before and would rather build one from the ground up that isn't my weekend warrior to learn the specifics, but, I would like to know how to perform some of these mounted motor maintenance options on a bike with 3400 miles and was pretty rough when i got it. Currently it runs well but does decelerate and pops a bit when you let off the throttle. I do have a couple very minor oil leaks but I'm running a 10/40 oil in 98* weather. Does anyone have any advice on the oil spinner and any other must do maintenance?

Thanks in advance

 

[b52bombardier1]

The popping is likely to be "lean backfire" secondary to a leaky or missing gasket at the exhaust pipe to head union. You are getting a little air in there that allows a little more combustion to be completed in the pipe. You could also be a little too lean on the main jet in the carb or you might have a vacuum leak that leans out your mixture.

Cleaning the clutch spinner is easy with the correct tools. A good set of JIS screwdrivers from Mcmaster Carr helps out - all three for less than $35 shipped. Or you can use an impact driver but this is rougher on the clutch and screws. Banging on the clutch with the impact driver without supporting the back of the clutch with two flat pieces of wood is inviting disaster. You need to buy an impact driver and the JIS screwdrivers in my opinion.

A clutch holder and a torque wrench are also necessary. A strap wrench to hold the clutch can work but its a slippery job and the clutch holder is better here. The torque wrench is necessary to put the required 28-33 foot pounds of torque back on the large clutch nut. And note that there is a metal "keeper" on this large nut with locking tabs. I have seen enough sludge here to bury these keepers and you need to tap the one that is up back down to unlock this nut.

And you might as well go ahead and buy a right side engine case gasket and an outer clutch cover gasket. Also buy a few extra outer clutch cover screws because it is quite possible you will be drilling the heads off of these. I would also buy a new kick starter shaft seal and replace it. It's short money and you will only be mad at yourself if your old one leaks after you are done.

Dr ATV has all of the parts on his web site. If you have any questions, let us know.

Rick