Got My Ebay Chinese 4-Stroke Belt Drive Kit Today

[Deleted Member 4613]

The bushing you found would drop in without any mod, based on my
measurements. It's an option. Knowing that it is genuine oilte gives
you the opportunity to remove it every 4-10 hours and soak it in
hot 30 wt oil, or overnight. I will order one and inspect it. If your
current bushing is brass like mine, and I suspect it is because I
bought my kit from the same seller as you, yes you would use
grease. Of course, nothing is going to work as well as sealed
ball bearings. I would say this bushing will be a little loose
since the housing is 19.89mm, but it might work. It could
cause some wobble. I changed my mind about ordering
one because of the possible loose fit.

 

[Deleted Member 4613]

I ordered 7 of these from Avid Racing, an established manufacturer serving
the rc racing community:

Avid Racing Concepts LLC | RC Bearings and Accessories for radio controlled vehicles

15x21x4 rubber bearing by Avid Racing Concepts is the standard outdrive bearing for Team Associated RC8B, RC8T, RC8BE, Mugen MBX6, MBX6T, MBX6-ECO, and Losi LST2. Check your manual for the correct size for you vehicle if you are not certain. Check your m

www.avidrc.com

Another realistic option for a good fit is to ream the housing to 21mm and use one of these
oilite bushings from McMaster-Carr. 6659K126. This flanged bushing would not require a press fit,
just take out enough material to drop in the bushing. It's 15x21x22 .

 

[JerryAssburger]

The bushing you found would drop in without any mod, based on my
measurements. It's an option. Knowing that it is genuine oilte gives
you the opportunity to remove it every 4-10 hours and soak it in
hot 30 wt oil, or overnight. I will order one and inspect it. If your
current bushing is brass like mine, and I suspect it is because I
bought my kit from the same seller as you, yes you would use
grease. Of course, nothing is going to work as well as sealed
ball bearings. I would say this bushing will be a little loose
since the housing is 19.89mm, but it might work. It could
cause some wobble. I changed my mind about ordering
one because of the possible loose fit.

I think the Oilite would definitely be better than the brass one. I'm gonna try it. Still love the kit. The little HS motor is worth it.

 

[Deleted Member 4613]

Just watch for some slight vibration and inspect the bushing after a couple
of hours or so. Let us know what happens. Between your test and mine, we'll
find a solution for everyone. I suggest taking some measurements before
installing it, and measuring it after use to detect any damage or changes.

 

[Chainlube]

Just watch for some slight vibration and inspect the bushing after a couple
of hours or so. Let us know what happens. Between your test and mine, we'll
find a solution for everyone. I suggest taking some measurements before
installing it, and measuring it after use to detect any damage or changes.

And, lots of pictures.

 

[Deleted Member 4613]

I was surprised to learn the company that sells the bushing
is located about 1/2 hour from me, Cadence Supply. They
supply industrial products.

 

[Deleted Member 4613]

Jerry, I believe I found the oilite solution for you that fits and
does not require any mod other than buying a top washer.
It's a sleeve oilite bushing 15x20x25, part number 6658K178
from McMaster-Carr. It should drop in perfectly, and find a
15mm top washer to hold it in. I ordered one for testing
and fitting.

 

[Deleted Member 4613]

Be careful not to tighten down on the bushing. There has to be
some space for the bushing to move freely. Tighten a little than
back off. Put a drop of oil on the underside of the washer.
To safeguard against over overtightening, you can order the
shorter 20 mm long version which will sit totally inside the
clutch housing. I ordered both to test. The shorter version is
15x20x20, part number 6658K177, McMaster-Carr.

 

[JerryAssburger]

I have an update on my kit... So tonight I decided to change the plug and check valve clearances. GLAD I DID. The intake had about 1/16" slop and the exhaust was pretty much on- but the real issue was the shaft that the rockers ride on. Is there supposed to be a set screw that holds it in? There's a hole drilled and tapped, but no set screw. I think the only thing holding the shaft in was the valve cover itself- unless that's by design....
I found a screw in my junk-box and tightened it in, just in case, but maybe one of the HS Experts can weigh in on this.
Put it back together and it's a little peppier. Before, I hit 30mph both ways on our street.

Funny- after wrenching on B/S and Tecumseh engines since I was a teen, these things are like working on an old wind-up alarm clock.... the parts are SO SMALL!

 

[Deleted Member 4613]

Have no help on this.