59mm engine experimentation

[kliff]

Looks like MaddMaxx is about a month from completion, and the whole reason for it's build is "quickie" engine changes...ie., NO bodywork.

So with it's impending conclusion, I started laying in some parts to start developing several different 59MM engine combos. Next month, I'll add a few more heads and half a dozen or so cams, maybe score a used engine or 2, and boom...we'll be ready to start 'sperimentin'!

As for now, unless I clean off another 4 foot of shelving, this is where we're standing...























That 4 ft section of shelving is DEFINITELY getting crowded.....
Hope some of y'all will benefit from the experimentation, but the 58.5/59mm big bore kits, not needing any machining to assemble, should be the most popular. Maybe this time next year, we'll move on to the PFS "Big Block." But for now, let's shoot for some reliable, but fun mouse motors. ;D

None of this is done with "sponsorship funds." This is all outta my pocket, so I can line up some inexpensive engine packages for the locals around here. Just thought I'd share all my findings with y'all. Cause if I screw up, or come up with something domed from the start, I'd rather it be on me, rather than another scooter owner. And when I hit a good combo, I want all the DAWGs to be able to duplicate.

61mm, 63mm, and strokers are coming soon.

But as an added "tidbit" of info, here is [glow=red,2,300]factoid #1[/glow]

1P57qmj engines CAN be converted to us the cheaper, and easier to find 157qmj heads.

here's what you need:
157qmj cam chain (autotech355)
157qmj cylinder studs #164-136 (PFS)

and naturally the 157qmj head and cam, with all associated valvetrain.

So as you can see, this thread will grow, with "factoids" of my research and development thrown in from time to time, that just might be helpful with all 150cc GY6's... ;D

[kliff]

MaddMaxx, has numero uno:

59mm with moly coated piston
Big port, oem size valves, port matched
K&S springs
A-9 cam
28mm OKO Flat(actually "D") slide carb, w/dial-a-jet & 5" K&N filter, reversed manifold
Homemeade 2 step, anti-reversion exhaust, 1", 1.25", & 1.5" diameters.
9200 rpm CDI
Bando Coil
Iridium plug

2.64:1 final gear

Has yet to be fired, scooter should be on the road in 3-5 weeks, and the testing will begin. From then on, testing will be much easier, as MM was built for quickie engine swaps to be used as the R&D platform. Maxx will be around for a LONG time....his powertrain....who knows what will be pushing it down the road next? For a while though, it'll be some developmental 59mm tiddlers.

[Rocketdog]

Kliff if I haven't said this before now, Nice inventory there.

[Deleted]

kliff,
Can I be so bold as to ask if you would consider the 1P58MJ engine? I can't find any performance parts/upgrades for it.

pugzila

[Rebel]

Pugzila

I just wanted to double check that you didn't mean 1P57QMJ

[harrywr2]

May 20, 2009 13:31:48 GMT -5 Rebel said:

Pugzila

I just wanted to double check that you didn't mean 1P57QMJ

The 1P58QMJ AKA GY6-B is for the 16 inch wheel bikes...variator and CVT belt are definitely different.

[kliff]

If I could find one, super cheap, I'd be glad to do a tear-down, and take some measurements. Cause if it's like Harry says, the topend, and even crankshaft may interchange. But I won't say yea or nay, 'till I can lay an eyeball and mic on one myself.

Honestly, until, last week, I'd never heard the designation "158" until last week. Then I was told it was water cooled...

So like I say Pugz....till I can put an eyeball on it...I'm clueless!

[harrywr2]

May 20, 2009 15:45:12 GMT -5 kliff said:

Honestly, until, last week, I'd never heard the designation "158" until last week. Then I was told it was water cooled...

CF Moto makes a 158MJ that is water cooled for 16" wheels. There are also air cooled 16" scooters as well.

[Rebel]

Ahhh,

You have the water cooled one then, now I understand why you are having trouble finding part to hop it up with then. their just are not enough of those out there to make a market for parts to be made.

On the other hand, I thought those were pretty fast anyway, compared to a stock 150cc GY6.

[therustyaxe]

Hey Kliff,

Can you get an intake riser? Carlos can't get one. Grrr.

I have to probs,

#1 I cannot fit a flatside carb because it hits the frame.

#2 I cannot use a performance CDI. I have tried three different brands. One just blows the fuse, the other two ... no spark.


Paul

[harrywr2]

May 21, 2009 3:45:17 GMT -5 therustyaxe said:

#2 I cannot use a performance CDI. I have tried three different brands. One just blows the fuse, the other two ... no spark.

Interesting...the QMB139-3 suffers the same problem.

[xs650]

May 21, 2009 3:45:17 GMT -5 therustyaxe said:

Hey Kliff,

Can you get an intake riser? Carlos can't get one. Grrr.

I have to probs,

#1 I cannot fit a flatside carb because it hits the frame.

#2 I cannot use a performance CDI. I have tried three different brands. One just blows the fuse, the other two ... no spark.


Paul

Have you got an electrical schematic for your scoot that you can post? I can't help with the problem but someone here might be able to. It might be something as simple as a different wiring order on the plug.

[kliff]

May 21, 2009 3:45:17 GMT -5 therustyaxe said:

Hey Kliff,

Can you get an intake riser? Carlos can't get one. Grrr.

I have to probs,

#1 I cannot fit a flatside carb because it hits the frame.

#2 I cannot use a performance CDI. I have tried three different brands. One just blows the fuse, the other two ... no spark.


Paul

Intake risers, those OEM plastic sorta doohickies....PFS, Partsforscooters.com

CDI's, untill I have some extra fundage, I'm running the oem CDI's...maybe XS or someone with a more electrical brain than mine can help....elctricalical things worry the crap outta me....cams, pistons, valves....that's my forte....

[Rebel]

JR likes wires maybe he can help.