Project "Got Milk" - Yamaha Cart

[DieselSlug]

Start of assembly.

 

[Husker6.5]

So, where's the turbo?

 

[DieselSlug]

Got the case back together. Also began some valve lapping.

 

[MrMarty51]

So, where's the turbo?

 

[Will L.]

Now if you could have a 5,000 rpm motor driving that....

 

[Husker6.5]

Look! A trailer park supercharger!

 

[Husker6.5]

Or, just one bright idea short of this one!

 

[MrMarty51]

Or, just one bright idea short of this one!View attachment 70341

If it were Me, I’d move that AC unit to the rear window on the drivers side. Its a bad deal to not be able to see out the passenger side.
Especially when those to the right have the right away.

 

[Husker6.5]

If it were Me, I’d move that AC unit to the rear window on the drivers side. Its a bad deal to not be able to see out the passenger side.
Especially when those to the right have the right away.

Which is why it's the good ol' trailer park engineering school!

 

[DieselSlug]

3 lapping tries until we held water and compressed air bubbles didn't come through.

 

[Husker6.5]

How's the valve stem to guide clearances?

 

[DieselSlug]

How's the valve stem to guide clearances?

Clearance per specification on both guides is .1mm.

To be honest I don't have a dial indicator so I had to take the head to a friend's. I only have a digital caliper. After getting the head pinned down to a table we got the indicator setup and it is right at .1mm

To be honest wiggling the stem in the guide it has barely any movement. Honestly the best I've ever felt. Being this is a low power small engine build I feel it is sufficient.

 

[DieselSlug]

Some more progress today. Got the valves sealed well and lash set per specs. Plastics on for the most part. I am at a stopping waiting on more parts. Hope to get some hardware tomorrow but the primary needs new rollers along with a new slinner sheave for the secondary.

 

[Husker6.5]

Sounds great. Was just hoping you weren't going to all this effort only to find that you were fogging for mosquitoes from worn valve guides after it was all back together and running.

 

[DieselSlug]

Got the block dated. Forgot this pic.

 

[DieselSlug]

Sounds great. Was just hoping you weren't going to all this effort only to find that you were fogging for mosquitoes from worn valve guides after it was all back together and running.

Its kinda strange as there is an oil seal on the intake side above the guide but not the exhaust side.

 

[Husker6.5]

If it were Me, I’d move that AC unit to the rear window on the drivers side. Its a bad deal to not be able to see out the passenger side.
Especially when those to the right have the right away.

But then you'd have two major problems. 1) Field of view blocked in the door mirror - making pulling out to pass an interesting prospect, and 2) the overhang issue with oncoming traffic - especially on a narrow residential street - could make things interesting!

 

[btfarm]

Its kinda strange as there is an oil seal on the intake side above the guide but not the exhaust side.

That's normal because the intake has vacuum to pull oil around the guides. Exhaust wouldn't.

 

[Husker6.5]

Its kinda strange as there is an oil seal on the intake side above the guide but not the exhaust side.

Evidently they didn't want intake suction to pull oil in, but didn't care about exhaust blowby contaminating the oil.

 

[DieselSlug]

Got the cradle on today. Working on thw next round of parts ordering.