AF05E Big Bore List - Aero and 88-93 elite Engines

This is the repository for hop-ups and mods for Elite and Spree. Look here for information on exhausts, porting, cylinders, intakes, and suspension mods.

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veedubh20
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Re: AF05E Big Bore List - Aero and 88-93 elite Engines

Post by veedubh20 » Sat Nov 07, 2009 2:57 am


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Re: AF05E Big Bore List - Aero and 88-93 elite Engines

Post by Bugaboo » Tue Nov 10, 2009 6:26 pm

Wheelman-111 wrote:Greetings:

Sorry that was confusing. Absolutely the Contesta kit is designed to re-use your stock head. In my case a channel was cut into it for use of a Corsa-type viton O-Ring. This makes head removal possible without sourcing spare head gaskets, and raises compression ratio for higher output. Premium fuel recommended.
Do you have to have your head modified to do this or do you just put the stock head on top of the channeled cylinder?
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Re: AF05E Big Bore List - Aero and 88-93 elite Engines

Post by Wheelman-111 » Tue Nov 10, 2009 6:55 pm

Greetings:

I had my head grooved - actually the scooter's - for the O-ring. Never seen the cylinder done that way.
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Re: AF05E Big Bore List - Aero and 88-93 elite Engines

Post by mr pibbs » Tue Nov 10, 2009 7:08 pm

jk171282jk wrote:
Wheelman-111 wrote:Greetings:

Sorry that was confusing. Absolutely the Contesta kit is designed to re-use your stock head. In my case a channel was cut into it for use of a Corsa-type viton O-Ring. This makes head removal possible without sourcing spare head gaskets, and raises compression ratio for higher output. Premium fuel recommended.
Do you have to have your head modified to do this or do you just put the stock head on top of the channeled cylinder?
Unlike the only spree kit that is available, you may just bolt on your original head with no modifications - so long as you use the correct provided head gasket.
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Re: AF05E Big Bore List - Aero and 88-93 elite Engines

Post by Bugaboo » Wed Nov 11, 2009 12:46 am

Just thought a gasketless cylinder would be more enjoyable to work on. I heard LSD really grooves your head :crazy:
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Re: AF05E Big Bore List - Aero and 88-93 elite Engines

Post by Lunytune » Wed Nov 11, 2009 9:03 am

jk171282jk wrote:Just thought a gasketless cylinder would be more enjoyable to work on. I heard LSD really grooves your head :crazy:
LSD? Are we talking scooters? :crazy:
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Groovin' the Cylinder and Head

Post by Wheelman-111 » Wed Nov 11, 2009 11:05 am

Greetings:

Replacing the base gasket with a Viton or Teflon O-ring is a great idea that never occurred to me. If there's enough space down there and the machine tool and skill set exists to carve a groove, it'd sure speed up the gasket-scraping process - AND avoid shreds dropping into the crankcase. Lapping the two surfaces together and using Copper Permatex worked for me, but an O-ring would probably be a more reliable seal.

As for the cylinder/head junction, I guess it's just a lot easier to carve on the head than the cylinder, but as long as the O-ring has a place to live, either would be fine.

Substituting an O-ring for the .02" thick gasket down below effectively lowers the ports, and so increases the static compression ratio two ways, considerably more than just O-ringing the head. Doing either mod, and especially if you do both, watch carefully for piston/head clearance issues. In my case, the Esteemed Scooterwerx machined a new combustion chamber in my stock head, as well as cutting the groove. 'Twas a thing of beauty, like all the machine work he does. I hope he remains available for future Scooter projects.
Wheelman-111
Most of my money is spent on scooterparts. The rest is just wasted.
Still Seeking Red PCX-150
Flash 9: 2001 Elite SR Contesta 72 ZX Tran, 9:1 Gears, Stock Airbox, Carb and Pipe 58.8 MPH
Punkin: 2010 Vespa/Malossi S78, 99KPH

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Re: AF05E Big Bore List - Aero and 88-93 elite Engines

Post by jamadi112233 » Sun Nov 29, 2009 7:26 pm

will these fit on all years of the aero?

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Re: AF05E Big Bore List - Aero and 88-93 elite Engines

Post by workdog » Sun Nov 29, 2009 7:47 pm

I think the AFO5E came in 85+ Aeros, not the early ones but I'm not positive.
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Re: AF05E Big Bore List - Aero and 88-93 elite Engines

Post by jamadi112233 » Sat Dec 05, 2009 11:03 am

can anyone else chime in on that i may be looking at buying one, but onle if i can up grade it. it is an 83

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Re: AF05E Big Bore List - Aero and 88-93 elite Engines

Post by turtle13 » Sat Dec 05, 2009 1:42 pm

jamadi112233 wrote:can anyone else chime in on that i may be looking at buying one, but onle if i can up grade it. it is an 83
Im not sure if there is any kit available for the pre 85 aeros. or atleast none that are available in the US.
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