El Lobo 6" Mini Motor Bike

[bob58o]

Going to check the engine tomorrow.
Compression loss has to be spark plug hole, valves, head gasket seal, or piston rings/cylinder, right???

Slipped pushrod?
Bent Rocker?

Hmmm?
Last time it was running was during the whiskey throttle wheelie rev when I messed up the cable. The bike didn't crash or fall... Wonder what happened.

 

[Randy H]

If your a worst case scenario type, hole in piston.

I really hope not.

 

[bob58o]

If your a worst case scenario type, hole in piston.

I really hope not.

Didn't think about that. I measured the piston head to be 0.200" and IIRC the pocket I cut was like 0.075" at the deepest.

I was thinking 37lb valve springs busted through thin head wall due to porting and valve spring pockets being cut.???

Pistons are $20. My head was a bit more.

 

[ezcome-ezgo]

El Lobo deserves better than this.

 

[Randy H]

I was thinking 37lb valve springs busted through thin head wall due to porting and valve spring pockets being cut.???

Seems like you would've heard all kinds of noise if that were the case. Any possibility of coil bind?

A stress riser caused by the pocket cutting operation?

A new MLS had gasket, I don't see that failing.

Well sorry for all the speculation, hope it turns out to be something stupid simple.

I guess I was wrong about a burned piston being worse case.

 

[itsid]

37lb springs... CrMo pushrods?
if not my bet's on bent pushrod
but that'd not cause a compression loss
(well not if it's not sticking and forcing a valve open of course or the endcap came loose and is stuck somewhere nasty)

IDK .. actually working your way top down is the only thing you can do really..
since evn if you find the the compression relase on the cam being stuck,
you'd want the rest to be checked anyways

'sid

 

[bob58o]

37lb springs... CrMo pushrods?
if not my bet's on bent pushrod
but that'd not cause a compression loss
(well not if it's not sticking and forcing a valve open of course or the endcap came loose and is stuck somewhere nasty)

IDK .. actually working your way top down is the only thing you can do really..
since evn if you find the the compression relase on the cam being stuck,
you'd want the rest to be checked anyways

'sid

Yes I have CrMo PushRods.
I thought about the compression release on cam, but since the pull start RPMs bump the valve open anyway... I think the compression would feel the same while using the pull start, release stuck or not. It feels like more compression is being lost than the release should be releasing.

I'll let you know what I find out as Scooby Doo and I set out in the Mystery Machine.

 

[Randy H]

Are you gonna have yourself a Scooby snack?

 

[bob58o]

I need a more profitable hobby.

I've been looking for early 2000's Civics, Accords, Corollas, and Camry's with less than 130,000 miles on them. If I can get them for slightly more than the trade in value and flip them for them the bottom end of the Private Seller "Fair Condition" KBB value... There seems to be some room for profit. Maybe $500-$1000 per flip.

For example the trade in value of a 2002 Accord with 130,000 miles is less than $500, but the Private Seller Value is $1800.

A 2002 Camry with 130,000 miles trades in for $1500 and sells privately for $3k.


https://chicago.craigslist.org/chc/cto/d/honda-accord-2000/6352594955.html
https://www.kbb.com/honda/accord/20...ate-party&options=6441329|true&condition=fair

Hi, I'm selling a 2000 Honda Accord four-cylinder four-door EXL sedan for $1200 or best offer local offers only.

He's asking $1,200, but I'd bet $1000 would take it. $100 mechanic inspection?
So if the inspection checks out, I'm $1100 deep and Private Seller KBB is $2100 for fair and $2350 for good condition. Leaves a decent chunk of wiggle room, right?
Seems like an easy $500 to me??

 

[ezcome-ezgo]

Flip 50 a year and you qualify for food stamps.

 

[bob58o]

Flip 50 a year and you qualify for food stamps.

What do I qualify for if I build 50 expensive minibikes?

 

[ezcome-ezgo]

All this means is that you'll leave DIYGoKarts and join DIYCarFlippers, and we will be left with a GAB void.

 

[bob58o]

All this means is that you'll leave DIYGoKarts and join DIYCarFlippers, and we will be left with a GAB void.

Me having my hands on numerous cheap Japanese Cars will not be a bad thing for the forum. I promise you that.

Been waiting on the brakes, but if they are not here I'm going to check the engine anyway.

 

[ezcome-ezgo]

Multi-task, the meter is running.

 

[bob58o]

So I took off the valve cover and everything seemed ok in there. Pulled the cord and seemed as though the Compression was back. Put the valve cover back on and it started fist pull.

 

[ezcome-ezgo]

Rumors of the compression's death were exaggerated.

 

[bob58o]

Drove it for a bit, then saw the catch can was leaking nasty looking grey milky oil. Drained the oil from the engine. It was pulsing out of the crank case. It was strange. Then went to empty the catch can and nothing came out. I had the valve on the catch can open, not closed. It's like an air compressor drain valve.

---------- Post added at 04:26 PM ---------- Previous post was at 04:16 PM ----------

But I've got some good data.

My 4000 RPM engagement driver unit starts to move the minibike with me on it at 3k RPM. Should of sprung for the yellow garter springs (comet 216111).

Cruising in the driveway, 4800 - 4900 RPM seemed around 14 - 15 mph. Holy Torque Batman.

There were lots of what seemed to be "After-Fires" in the exhaust (-thanks Hellion) when allowing the throttle to close quickly. At one point it died when I let the throttle snap shut.

All very good data collected on the very brief test drive!!!!! This is learning!!!


The swing of emotions I experience can best be described in the form of this Irish tale....
Worth repeat posting IMHO
https://www.youtube.com/watch?v=qYBH2gh-5XU

 

[bob58o]

Are crap videos better than no videos?

https://m.youtube.com/watch?v=jnIaEmtqvk8
https://m.youtube.com/watch?v=JOpz-AW8DB4

 

[MTNSleder]

Leave for 10 days and your still not done?

 

[bob58o]

Leave for 10 days and your still not done?

I get no satisfaction out of finishing. Wait, never-mind, yes I do.

I got fresh oil.
I got compression.
My brake is here.

I might leave the driveway tomorrow? Who knows?